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All questions of Crop Production and Management for Class 8 Exam
Which of the following tools would a farmer use to remove weeds from the field?
- a)Hoe
- b)Axe
- c)Plough
- d)Cultivator
Correct answer is option 'A'. Can you explain this answer?
Which of the following tools would a farmer use to remove weeds from the field?
a)
Hoe
b)
Axe
c)
Plough
d)
Cultivator
|
Aditya Shah answered |
Option A: Hoe is used to remove weeds and to loosen the soil. Hoe works like a blade. Below is the image of Hoe.
Option B: Axe is used to cut the trees.
Option C: Plough is used for tilling the soil.
Option D: The cultivator is used for ploughing.
Option C: Plough is used for tilling the soil.
Option D: The cultivator is used for ploughing.
Thus, option A is correct.
Cutting mature crop manually or by a machine is called:
- a)Irrigating
- b)Harvesting
- c)Breeding
- d)Weeding
Correct answer is option 'B'. Can you explain this answer?
Cutting mature crop manually or by a machine is called:
a)
Irrigating
b)
Harvesting
c)
Breeding
d)
Weeding
|
|
Anita Menon answered |
The process of cutting the mature crop manually or by machine is called harvesting. The crops are pulled out or cut close to the ground.
The first agricultural task is the sowing of seeds. - a)True
- b)False
Correct answer is option 'B'. Can you explain this answer?
The first agricultural task is the sowing of seeds.
a)
True
b)
False
|
Bhakti Mehta answered |
The first agricultural task is Preparation of soil. Therefore, Sowing of seeds is not the first agricultural task.
Option (b)
Weeds are the:- a)main crop plants
- b)insects and pests
- c)unwanted plants growing along the crop
- d)chemical substances.
Correct answer is option 'C'. Can you explain this answer?
Weeds are the:
a)
main crop plants
b)
insects and pests
c)
unwanted plants growing along the crop
d)
chemical substances.
|
Ritu Joshi answered |
A weed is a plant growing in the 'wrong' place; where it is not wanted or where it causes harm. A weed in a garden may make the garden look untidy and it may shade out or strangle garden plants. A weed in the New Zealand environment may exclude native species, change the environment to make it less suitable to native animals or impact on the farming economy.
In ancient cultures, process of separating grains from chaff is :- a)Buffering
- b)Harvesting
- c)Wind Winnowing
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
In ancient cultures, process of separating grains from chaff is :
a)
Buffering
b)
Harvesting
c)
Wind Winnowing
d)
None of these
|
Akshita Bose answered |
Wind winnowing is an agricultural method developed by ancient cultures for separating grain from chaff. It is also used to remove hay and chaff or other pests from stored grain.
Any plant cultivated at a large stretch of land is called :- a)crop
- b)weed
- c)cereal
- d)fibre
Correct answer is option 'A'. Can you explain this answer?
Any plant cultivated at a large stretch of land is called :
a)
crop
b)
weed
c)
cereal
d)
fibre
|
Rohini Seth answered |
When plants of the same kind are grown and cultivated in one place on large scale, it is called a crop.
Example: Crop of wheat, crop of rice, etc.
Example: Crop of wheat, crop of rice, etc.
Seed drill is used to remove grains from chaff.- a)True
- b)False
Correct answer is option 'B'. Can you explain this answer?
Seed drill is used to remove grains from chaff.
a)
True
b)
False
|
Shubham Sharma answered |
Seed drill is for drilling the seeds or actually sowing seeds not removing seeds.
Winowing is used for this process.
The monsoon season in India is during the months:
- a)April to December
- b)June to September
- c)November to March
- d)January to May
Correct answer is option 'B'. Can you explain this answer?
The monsoon season in India is during the months:
a)
April to December
b)
June to September
c)
November to March
d)
January to May
|
|
Amit Sharma answered |
Monsoon or rainy season, lasting from June to September. The season is dominated by the humid southwest summer monsoon, which slowly sweeps across the country beginning in late May or early June. Monsoon rains begin to recede from North India at the beginning of October. South India typically receives more rainfall.
Separating grains from chaff is called:
- a)winnowing
- b)harvesting
- c)tilling
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Separating grains from chaff is called:
a)
winnowing
b)
harvesting
c)
tilling
d)
None of these
|
|
Aditya Shah answered |
The process of separating grains from chaff is called as winnowing
Which of the following statements can be regarded as an advantage of seed drill?- a)Avoiding overcrowding allows plants to get sufficient sunlight and nutrients.
- b)Seed drill reduces time and labour.
- c)It ensures seeds get covered by the soil after sowing, preventing damage caused by birds.
- d)All of the above.
Correct answer is option 'D'. Can you explain this answer?
Which of the following statements can be regarded as an advantage of seed drill?
a)
Avoiding overcrowding allows plants to get sufficient sunlight and nutrients.
b)
Seed drill reduces time and labour.
c)
It ensures seeds get covered by the soil after sowing, preventing damage caused by birds.
d)
All of the above.
|
|
Shubham Sharma answered |
Nowadays, the seed drill is used for sowing with the help of tractors. This tool sows the seeds uniformly at proper distances and depths. It ensures that seeds get covered by the soil after sowing. This prevents damage caused by birds. Sowing by using a seed drill saves time and labour.
The soil matter formed by decayed organic matter is called
- a)pesticide
- b)fertiliser
- c)humus
- d)biocide
Correct answer is option 'C'. Can you explain this answer?
The soil matter formed by decayed organic matter is called
a)
pesticide
b)
fertiliser
c)
humus
d)
biocide
|
Nayanika Das answered |
Humus
Humus is the soil matter formed by the decay of organic matter such as dead plants, leaves, and other materials. It is a dark, organic material that provides numerous benefits to soil health and fertility. Here are some key points to understand about humus:
Nutrient-rich
Humus is rich in nutrients like nitrogen, phosphorus, and potassium, which are essential for plant growth. These nutrients are released slowly over time, providing a steady supply for plants to absorb.
Improves soil structure
Humus helps improve soil structure by binding particles together, creating aggregates that allow for better water infiltration and root growth. It also helps prevent soil erosion by holding soil in place.
Enhances water retention
Humus has a high water-holding capacity, which helps soil retain moisture and reduces the need for frequent watering. This is especially beneficial during dry periods when water availability is limited.
Promotes microbial activity
Humus provides a habitat for beneficial soil microorganisms, such as bacteria and fungi, which play a crucial role in nutrient cycling and plant health. These microorganisms break down organic matter further, releasing more nutrients for plants.
In conclusion, humus is a vital component of healthy soil that supports plant growth and overall soil fertility. Its presence in the soil is essential for sustaining agricultural productivity and ecosystem health.
Humus is the soil matter formed by the decay of organic matter such as dead plants, leaves, and other materials. It is a dark, organic material that provides numerous benefits to soil health and fertility. Here are some key points to understand about humus:
Nutrient-rich
Humus is rich in nutrients like nitrogen, phosphorus, and potassium, which are essential for plant growth. These nutrients are released slowly over time, providing a steady supply for plants to absorb.
Improves soil structure
Humus helps improve soil structure by binding particles together, creating aggregates that allow for better water infiltration and root growth. It also helps prevent soil erosion by holding soil in place.
Enhances water retention
Humus has a high water-holding capacity, which helps soil retain moisture and reduces the need for frequent watering. This is especially beneficial during dry periods when water availability is limited.
Promotes microbial activity
Humus provides a habitat for beneficial soil microorganisms, such as bacteria and fungi, which play a crucial role in nutrient cycling and plant health. These microorganisms break down organic matter further, releasing more nutrients for plants.
In conclusion, humus is a vital component of healthy soil that supports plant growth and overall soil fertility. Its presence in the soil is essential for sustaining agricultural productivity and ecosystem health.
Combines are used for:- a)sowing of seeds
- b)harvesting the crops
- c)threshing
- d)harvesting and threshing both.
Correct answer is option 'D'. Can you explain this answer?
Combines are used for:
a)
sowing of seeds
b)
harvesting the crops
c)
threshing
d)
harvesting and threshing both.
|
|
Aditi Saxena answered |
The modern combine harvester, or simply combine, is a versatile machine designed to efficiently harvest a variety of grain crops. The name derives from its combining three separate harvesting operations - reaping, threshing, and winnowing - into a single process.
Drip irrigation system is the economical method of irrigation. - a)True
- b)False
Correct answer is option 'A'. Can you explain this answer?
Drip irrigation system is the economical method of irrigation.
a)
True
b)
False
|
|
Amit Kumar answered |
Drip irrigation is water economical method because in this irrigation system water falls drop by drop on the position of roots of the plant, thereby reducing both the consumption and loss of water.
Examples of kharif crops are- a)Wheat and maize
- b)Gram and maize
- c)Paddy and maize
- d)All of these.
Correct answer is option 'C'. Can you explain this answer?
Examples of kharif crops are
a)
Wheat and maize
b)
Gram and maize
c)
Paddy and maize
d)
All of these.
|
Kavya Saxena answered |
The crops that are sown in the rainy season are called Kharif crops in India. Kharif crops are usually sown with the beginning of the first rains in July. The example of kharif crops are:-
Paddy and maize.
Paddy and maize.
Weeding is necessary because weeds compete with the crop plants for _____, ______, ______, and ______.
- a)Tempreture,Water, Sunlight, Air
- b)Sunlight, Water, Space, Nutrients
- c)Nutrients, Sunlight, Air, Space
- d)Water, Space, Sunlight, Tempreture
Correct answer is option 'B'. Can you explain this answer?
Weeding is necessary because weeds compete with the crop plants for _____, ______, ______, and ______.
a)
Tempreture,Water, Sunlight, Air
b)
Sunlight, Water, Space, Nutrients
c)
Nutrients, Sunlight, Air, Space
d)
Water, Space, Sunlight, Tempreture
|
Gargi Choudhary answered |
Importance of Weeding in Agriculture
Explanation of the Answer
Therefore, weeding is necessary in agriculture to ensure that crop plants have sufficient access to space, water, light, and air, allowing them to thrive and produce high yields. By removing weeds, farmers can help their crops grow more efficiently and effectively, ultimately leading to better harvests.
- Competition for Resources: Weeds compete with crop plants for resources such as space, water, light, and air. This competition can significantly reduce the growth and yield of the crop plants.
Explanation of the Answer
- Space: Weeds take up space in the soil where crop plants could be growing. This limits the space available for the roots of crop plants to spread out and absorb nutrients and water.
- Water: Weeds absorb water from the soil, competing with crop plants for this essential resource. This can lead to water stress in crop plants, affecting their growth and productivity.
- Light: Weeds can block sunlight from reaching crop plants, reducing the photosynthetic activity of the crop plants. This can hinder their ability to produce energy and grow effectively.
- Air: Weeds can also compete with crop plants for access to air, which is essential for respiration and other physiological processes. Restricted air circulation can negatively impact the growth of crop plants.
Therefore, weeding is necessary in agriculture to ensure that crop plants have sufficient access to space, water, light, and air, allowing them to thrive and produce high yields. By removing weeds, farmers can help their crops grow more efficiently and effectively, ultimately leading to better harvests.
Rahat is the device which is used to plough fields.- a)True
- b)False
Correct answer is option 'B'. Can you explain this answer?
Rahat is the device which is used to plough fields.
a)
True
b)
False
|
Manasa Nambiar answered |
Incorrect Statement
The statement "Rahat is the device which is used to plough fields" is incorrect.
Explanation
- Rahat is not a device but a name of a person, which means "comfort" or "ease".
- Ploughing fields is done using various types of equipment such as ploughs, harrows, cultivators, etc. These devices are designed to break up and loosen the soil, preparing it for planting crops.
- Ploughs are the most commonly used agricultural tool for ploughing fields. They are drawn by animals such as oxen, horses, or mules. The plough has a blade or share which cuts through the soil, turning it over and creating furrows for planting.
- Harrows are used for smoothing and leveling the soil after ploughing. They break up clumps of dirt and remove weeds, creating a fine seedbed for planting.
- Cultivators are used for tilling the soil and removing weeds. They are smaller than ploughs and are often used in gardens and small farms.
Conclusion
In conclusion, Rahat is not a device used for ploughing fields. Ploughs, harrows, and cultivators are the common types of equipment used for preparing fields for planting crops.
The statement "Rahat is the device which is used to plough fields" is incorrect.
Explanation
- Rahat is not a device but a name of a person, which means "comfort" or "ease".
- Ploughing fields is done using various types of equipment such as ploughs, harrows, cultivators, etc. These devices are designed to break up and loosen the soil, preparing it for planting crops.
- Ploughs are the most commonly used agricultural tool for ploughing fields. They are drawn by animals such as oxen, horses, or mules. The plough has a blade or share which cuts through the soil, turning it over and creating furrows for planting.
- Harrows are used for smoothing and leveling the soil after ploughing. They break up clumps of dirt and remove weeds, creating a fine seedbed for planting.
- Cultivators are used for tilling the soil and removing weeds. They are smaller than ploughs and are often used in gardens and small farms.
Conclusion
In conclusion, Rahat is not a device used for ploughing fields. Ploughs, harrows, and cultivators are the common types of equipment used for preparing fields for planting crops.
Paddy and maize are the examples of ___________.- a)Zaid crops
- b)Rabi crops
- c)Kharif crops
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
Paddy and maize are the examples of ___________.
a)
Zaid crops
b)
Rabi crops
c)
Kharif crops
d)
None of these
|
|
Shubham Sharma answered |
Paddy, maize are examples of Kharif crops because they require a lot of water so they are cultivated in rainy season.
Seed drill is used to- a)sow the seeds
- b)remove the weeds
- c)remove the pest
- d)mix manure in the soil.
Correct answer is option 'A'. Can you explain this answer?
Seed drill is used to
a)
sow the seeds
b)
remove the weeds
c)
remove the pest
d)
mix manure in the soil.
|
Gauri Dey answered |
The correct answer is A as Seed drill is a device that sows the seeds for crops by positioning them in the soil and burying them to a specific depth.
The period of crop harvesting is celebrated with great joy and happiness in all parts of India. Special festivals are associated with the harvest season. Which among the following group of festivals is associated with harvest season?
- a)Pongal, Baisakhi,Onam,Makar Sankranti
- b)Diwali, Christmas, Eid, Pongal
- c)Pongal, Eid, Holi, Nabanna
- d)Pongal, Baishakhi, Eid, Nabanna
Correct answer is option 'A'. Can you explain this answer?
The period of crop harvesting is celebrated with great joy and happiness in all parts of India. Special festivals are associated with the harvest season. Which among the following group of festivals is associated with harvest season?
a)
Pongal, Baisakhi,Onam,Makar Sankranti
b)
Diwali, Christmas, Eid, Pongal
c)
Pongal, Eid, Holi, Nabanna
d)
Pongal, Baishakhi, Eid, Nabanna
|
Gowri Ahuja answered |
Pongal, Baisakhi,Onam,Makar Sankranti are the festivals associated with harvest season while Christmas and Eid are not associated with harvest season.
Grains are separated from stalks by a process called________- a)Harvesting
- b)Threshing
- c)Weeding
- d)Winnowing
Correct answer is option 'B'. Can you explain this answer?
Grains are separated from stalks by a process called________
a)
Harvesting
b)
Threshing
c)
Weeding
d)
Winnowing
|
Nitin Sen answered |
Threshing- The Process of Separating Grains from Stalks
Threshing is a process that is used to separate grains from the stalks. It is an important step in the harvesting of crops such as wheat, rice, and barley. Threshing involves the use of a machine or a tool to separate the grain from the stalks.
The Process of Threshing
The process of threshing involves the following steps:
1. Harvesting: The first step in the process of threshing is harvesting. The crops are harvested when they are mature and ready for harvesting.
2. Separating: After harvesting, the crops are separated into stalks and grains. This is done by using a machine or a tool.
3. Beating: The next step in the process is beating. The stalks are beaten to separate the grains from the stalks.
4. Cleaning: After beating, the grains and stalks are separated. The grains are then cleaned to remove any dirt or debris.
5. Winnowing: The final step in the process is winnowing. The grains are winnowed to separate them from the chaff. Winnowing involves tossing the grain into the air while the wind blows away the chaff.
Importance of Threshing
Threshing is an important step in the harvesting process as it allows farmers to separate grains from the stalks. This makes it easier to store and transport the grains. Threshing also ensures that the grains are of high quality as it removes any unwanted debris or chaff.
Conclusion
In conclusion, threshing is an important step in the harvesting process. It involves the use of a machine or a tool to separate grains from the stalks. Threshing ensures that the grains are of high quality and easier to store and transport.
Threshing is a process that is used to separate grains from the stalks. It is an important step in the harvesting of crops such as wheat, rice, and barley. Threshing involves the use of a machine or a tool to separate the grain from the stalks.
The Process of Threshing
The process of threshing involves the following steps:
1. Harvesting: The first step in the process of threshing is harvesting. The crops are harvested when they are mature and ready for harvesting.
2. Separating: After harvesting, the crops are separated into stalks and grains. This is done by using a machine or a tool.
3. Beating: The next step in the process is beating. The stalks are beaten to separate the grains from the stalks.
4. Cleaning: After beating, the grains and stalks are separated. The grains are then cleaned to remove any dirt or debris.
5. Winnowing: The final step in the process is winnowing. The grains are winnowed to separate them from the chaff. Winnowing involves tossing the grain into the air while the wind blows away the chaff.
Importance of Threshing
Threshing is an important step in the harvesting process as it allows farmers to separate grains from the stalks. This makes it easier to store and transport the grains. Threshing also ensures that the grains are of high quality as it removes any unwanted debris or chaff.
Conclusion
In conclusion, threshing is an important step in the harvesting process. It involves the use of a machine or a tool to separate grains from the stalks. Threshing ensures that the grains are of high quality and easier to store and transport.
2,4-D is a
- a)Pesticide
- b)Insecticide
- c)Fungicide
- d)Weedicide.
Correct answer is option 'D'. Can you explain this answer?
2,4-D is a
a)
Pesticide
b)
Insecticide
c)
Fungicide
d)
Weedicide.
|
Geetika Shah answered |
Weedicides are commonly called herbicides. They are chemicals that control weeds to enter the field and compete with the crops andhence cause a direct effect on the crop. Some common herbicides are Metachlor, Nitofen, Round- up and 2,4-D.
Cutting mature crop manually or by a machine is called:- a)Irrigating
- b)Harvesting
- c)Breeding
- d)Weeding
Correct answer is 'B'. Can you explain this answer?
Cutting mature crop manually or by a machine is called:
a)
Irrigating
b)
Harvesting
c)
Breeding
d)
Weeding
|
Tejas Iyer answered |
The process of cutting mature crop manually or by machine is called harvesting. In harvesting, crops are pulled out or cut close to the ground.
________ is used to bring a bucket of water where the power is needed.- a)Moat
- b)Rahat
- c)Dhekli
- d)Chain pump
Correct answer is option 'A'. Can you explain this answer?
________ is used to bring a bucket of water where the power is needed.
a)
Moat
b)
Rahat
c)
Dhekli
d)
Chain pump
|
|
Shubham Sharma answered |
Moat system of irrigation involves taking out water directly from the well and supplying it to the irrigation field. It consists of a bucket tied to a rope attached to the well by a pulley system.
What is tilling?- a)Turning and loosening of the soil.
- b)Turning and tightening of soil.
- c)Killing the crop plants before they grow
- d)Secreting poisons that cause diseases in crop plants
Correct answer is option 'A'. Can you explain this answer?
What is tilling?
a)
Turning and loosening of the soil.
b)
Turning and tightening of soil.
c)
Killing the crop plants before they grow
d)
Secreting poisons that cause diseases in crop plants
|
Vivek Rana answered |
Preparation of soil: Soil is prepared well before planting a crop. This is called tilling the soil. Ploughing helps in loosening and turning the topsoil upside down and also in mixing the heaps of compost with the soil.
Plants contain nearly __________ water.- a)10%
- b)50%
- c)90%
- d)75%
Correct answer is option 'C'. Can you explain this answer?
Plants contain nearly __________ water.
a)
10%
b)
50%
c)
90%
d)
75%
|
Vandana Mehta answered |
Explanation:
Water content in plants:
- Plants contain a high percentage of water, which is essential for their growth and survival.
- On average, plants contain nearly 90% water in their tissues.
Importance of water in plants:
- Water plays a crucial role in various physiological processes in plants, such as photosynthesis, nutrient uptake, and transportation.
- It helps in maintaining turgidity in plant cells, which provides structural support to the plant.
Functions of water in plants:
- Water is a solvent that helps in the transport of nutrients and minerals within the plant.
- It is also involved in the process of transpiration, where water evaporates from the plant's leaves, helping in cooling and nutrient distribution.
Water storage in plants:
- Plants store water in various parts like roots, stems, and leaves to use during times of drought or scarcity.
- Succulent plants, like cacti, have specialized tissues for water storage, allowing them to survive in arid environments.
Conclusion:
- In conclusion, water is a vital component of plants, constituting a significant portion of their overall composition. Its presence is crucial for the growth, development, and survival of plants in various ecosystems.
Water content in plants:
- Plants contain a high percentage of water, which is essential for their growth and survival.
- On average, plants contain nearly 90% water in their tissues.
Importance of water in plants:
- Water plays a crucial role in various physiological processes in plants, such as photosynthesis, nutrient uptake, and transportation.
- It helps in maintaining turgidity in plant cells, which provides structural support to the plant.
Functions of water in plants:
- Water is a solvent that helps in the transport of nutrients and minerals within the plant.
- It is also involved in the process of transpiration, where water evaporates from the plant's leaves, helping in cooling and nutrient distribution.
Water storage in plants:
- Plants store water in various parts like roots, stems, and leaves to use during times of drought or scarcity.
- Succulent plants, like cacti, have specialized tissues for water storage, allowing them to survive in arid environments.
Conclusion:
- In conclusion, water is a vital component of plants, constituting a significant portion of their overall composition. Its presence is crucial for the growth, development, and survival of plants in various ecosystems.
What happens if weeds are allowed to produce flowers and seeds?- a)They become less harmful
- b)They decrease soil fertility
- c)They spread and increase their numbers
- d)They improve crop yield
Correct answer is option 'C'. Can you explain this answer?
a)
They become less harmful
b)
They decrease soil fertility
c)
They spread and increase their numbers
d)
They improve crop yield
|
S.S Career Academy answered |
If weeds are allowed to produce flowers and seeds, they will spread and increase in number, which can lead to more competition with crops for resources. Managing weeds before they flower and seed is crucial to prevent their proliferation and protect crop yields.
Rabi crops are sown in- a)March, April
- b)May, June
- c)September, October
- d)Any time.
Correct answer is option 'C'. Can you explain this answer?
Rabi crops are sown in
a)
March, April
b)
May, June
c)
September, October
d)
Any time.
|
|
Geetika Shah answered |
The crops that are sown in the winter season are called Rabi crops. (also known as the “winter crop”). Rabi crops are the crops that are sown at the end of monsoon or at the beginning of winter season, e.g. between September and October.
Which are the different traditional methods of irrigation?- a)Chain pump
- b)Dhekli
- c)Rahat
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
Which are the different traditional methods of irrigation?
a)
Chain pump
b)
Dhekli
c)
Rahat
d)
All of the above
|
|
Aditya Shah answered |
- Chain pump: A chain pump consists of two large wheels connected by a chain.
- Dhekli: It is a process of drawing water from a well or such similar source.
- Rahat: Rahat is a technology of manpower for lifting water from well. It is completely made of iron.
The soil matter formed by decayed organic matter is called- a)pesticide
- b)fertiliser
- c)humus
- d)biocide
Correct answer is option 'C'. Can you explain this answer?
The soil matter formed by decayed organic matter is called
a)
pesticide
b)
fertiliser
c)
humus
d)
biocide
|
|
Aditya Shah answered |
The organic matter in soil derives from plants, animals and microorganisms. ... When it decays to the point in which it is no longer recognizable, it is called soil organic matter. When the organic matter has broken down into a stable substance that resists further decomposition it is called humus.
Match different terms in column I with their related description in column II and select the correct option from the codes given below.
- a)(a) - (i), (b) - (iii), (c) - (ii), (d) - (iv)
- b)(a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)
- c)(a) - (ii), (b) - (iv), (c) - (i), (d) - (iii)
- d)(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)
Correct answer is option 'C'. Can you explain this answer?
Match different terms in column I with their related description in column II and select the correct option from the codes given below.
a)
(a) - (i), (b) - (iii), (c) - (ii), (d) - (iv)
b)
(a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)
c)
(a) - (ii), (b) - (iv), (c) - (i), (d) - (iii)
d)
(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)
|
|
Anita Menon answered |
The correct answer is C as the correct code of column with their description is in option C
Transplantation of seedling is done in- a)coffee
- b)cocoa
- c)rice
- d)mango
Correct answer is option 'C'. Can you explain this answer?
Transplantation of seedling is done in
a)
coffee
b)
cocoa
c)
rice
d)
mango
|
|
Shubham Sharma answered |
Rice seedlings grown in a nursery are pulled and transplanted into puddled and levelled fields 15 to 40 days after seeding (DAS). Rice seedlings can either be transplanted manually or by machine. This is done in order to get higher yields and less weeding.
The supply of water to crops at regular intervals is called ____________.
- a)Crop rotation
- b)Irrigation
- c)Manure
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
The supply of water to crops at regular intervals is called ____________.
a)
Crop rotation
b)
Irrigation
c)
Manure
d)
None of these
|
|
Vivek Rana answered |
The supply of water to crops at regular intervals is called irrigation.
Given below are statements about the harmful effects of weeds on crop plants.(i)They interfere while harvesting.(ii)They help crop plants thrive.(iii)They compete with crop plants for water, nutrients, space, and light.(iv)They affect plant growth.Choose the correct statements from above.- a)(i), (iii) and (iv)
- b)(iii) only
- c)(iii) and (iv)
- d)(i), (ii), (iii) and (iv)
Correct answer is option 'A'. Can you explain this answer?
Given below are statements about the harmful effects of weeds on crop plants.
(i)They interfere while harvesting.
(ii)They help crop plants thrive.
(iii)They compete with crop plants for water, nutrients, space, and light.
(iv)They affect plant growth.
Choose the correct statements from above.
a)
(i), (iii) and (iv)
b)
(iii) only
c)
(iii) and (iv)
d)
(i), (ii), (iii) and (iv)
|
|
Shubham Sharma answered |
Weeds compete with crops for one or more plant growth factors such as mineral nutrients, water, solar energy, and space and they hinder crop cultivation operations. Competition for mineral nutrients: Being hardy and vigorous in growth habit; they soon outgrow the crops and consume large amounts of water and nutrients.
Read the following statements:
i. Tilling uproots all unwanted plants.
ii. Tilling loosens the soil and mixes fertilisers.
- a)Statement i) is wrong and ii) is correct
- b)Statement ii) is wrong and i) is correct
- c)both are wrong
- d)both are correct
Correct answer is option 'D'. Can you explain this answer?
Read the following statements:
i. Tilling uproots all unwanted plants.
ii. Tilling loosens the soil and mixes fertilisers.
i. Tilling uproots all unwanted plants.
ii. Tilling loosens the soil and mixes fertilisers.
a)
Statement i) is wrong and ii) is correct
b)
Statement ii) is wrong and i) is correct
c)
both are wrong
d)
both are correct
|
Arpita Basu answered |
The process of loosing and turning of the soil is called tilling. Tilling uproots all unwanted plants and loosens the soil and mixes the organic fertilizers with soil.
Cutting mature crop manually or by a machine is called:- a)Irrigating
- b)Harvesting
- c)Breeding
- d)Weeding
Correct answer is option 'B'. Can you explain this answer?
Cutting mature crop manually or by a machine is called:
a)
Irrigating
b)
Harvesting
c)
Breeding
d)
Weeding
|
Sarita Verma answered |
The cutting of crop after it is mature is called harvesting. In harvesting, crops are pulled out or cut close to the ground. It usually takes 3 to 4 months for a cereal crop to mature. Harvesting in our country is either done manually by sickle or by a machine called harvester.
The bacteria present in root nodules of leguminous plants that fix the atmospheric nitrogen is- a)Rhizobium
- b)Blue-green algae
- c)Nitrifying bacteria
- d)Paramoecium
Correct answer is option 'A'. Can you explain this answer?
The bacteria present in root nodules of leguminous plants that fix the atmospheric nitrogen is
a)
Rhizobium
b)
Blue-green algae
c)
Nitrifying bacteria
d)
Paramoecium
|
|
Aditya Shah answered |
The Rhizobium or Bradyrhizobium bacteria colonize the host plant's root system and cause the roots to form nodules to house the bacteria. The bacteria then begin to fix the nitrogen required by the plant.
Tool used for removal of weed is called as_________.
- a)seed drill
- b)Hoe
- c)plough
- d)Cultivator
Correct answer is option 'B'. Can you explain this answer?
Tool used for removal of weed is called as_________.
a)
seed drill
b)
Hoe
c)
plough
d)
Cultivator
|
|
Aditya Shah answered |
- A hoe is a simple tool used for removing weeds & for loosening the soil.
- It consists of a blade set at right angles to a long handle.
- It is commonly used in gardening and horticulture to loosen dirt and to chop weeds.
- Primitive subsistence agriculture is practiced on small patches of land with the help of hoe.
- Hoe helps in clearing soil of old roots and crop residues.
The semi-arid plains of a particular region show a pattern of alternating yellow and black stripes on the ground. The yellow stripes consist of land covered by ripening wheat. The black stripes are bare soil on which no crop is grown but farmers use herbicides or tillage to remove any weeds that try to grow in that region. Why do farmers in this region manage soils in this way?- a)Farmers put the half of their land to rest for minimising erosion and soil degradation.
- b)Farmers discourage transpiration in the wheat plantation by allowing free evaporation from the soil of the bare stripes.
- c)Farmers try to store some part of one year's rainwater in the soil under the bare stripes and use that water to supplement the rain on wheat crop planted the next year.
- d)All of these
Correct answer is option 'C'. Can you explain this answer?
The semi-arid plains of a particular region show a pattern of alternating yellow and black stripes on the ground. The yellow stripes consist of land covered by ripening wheat. The black stripes are bare soil on which no crop is grown but farmers use herbicides or tillage to remove any weeds that try to grow in that region. Why do farmers in this region manage soils in this way?
a)
Farmers put the half of their land to rest for minimising erosion and soil degradation.
b)
Farmers discourage transpiration in the wheat plantation by allowing free evaporation from the soil of the bare stripes.
c)
Farmers try to store some part of one year's rainwater in the soil under the bare stripes and use that water to supplement the rain on wheat crop planted the next year.
d)
All of these
|
|
Kavya Saxena answered |
- In the semi arid Plains ofa particular region farmers grow wheat in some long and leave back the black strips of land but take care of that land by using weedicides this is because rain harvesting is done in that black stripped areas.
- Sometimes semi arid areas do not get enough amount of rainwater due to some environmental conditions and hence the prestored rainwater in the black strips are used to cultivate wheat crops.
_______farming includes cattle, goat, sheep, poultry, and fish farming.
- a)Animal-based
- b)Plant-based
- c)both (A) and (B)
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
_______farming includes cattle, goat, sheep, poultry, and fish farming.
a)
Animal-based
b)
Plant-based
c)
both (A) and (B)
d)
none of these
|
|
Vivek Rana answered |
Animal-based farming includes different types of farming like cattle farming, goat farming, sheep farming, poultry farming, and fish farming.
What does the given figure signify?
- a)Life cycle of a plant
- b)Jhum cultivation
- c)Crop rotation
- d)Mixed cropping
Correct answer is option 'C'. Can you explain this answer?
What does the given figure signify?
a)
Life cycle of a plant
b)
Jhum cultivation
c)
Crop rotation
d)
Mixed cropping
|
|
Amit Kumar answered |
Crop rotation is the practice of growing a series of different types of crops in the same area across a sequence of growing seasons. It reduces reliance on one set of nutrients, pest and weed pressure, and the probability of developing resistant pest and weeds.
The cutting and gathering of crop after it is matured is called X. After this, grains are separated from the crop by a process called Y. Z is the process of separating the hay and chaff from the grains. Which of the following statements is/are correct regarding X, Y and Z?- a)Z is done with the help of wind in which grains along with husk is allowed to fall from a height.
- b)X is done mechanically by combine and manually by plough and harrow.
- c)X is the process known as threshing whereas Y is the process known as winnowing.
- d)Both (a) and (b)
Correct answer is option 'A'. Can you explain this answer?
The cutting and gathering of crop after it is matured is called X. After this, grains are separated from the crop by a process called Y. Z is the process of separating the hay and chaff from the grains. Which of the following statements is/are correct regarding X, Y and Z?
a)
Z is done with the help of wind in which grains along with husk is allowed to fall from a height.
b)
X is done mechanically by combine and manually by plough and harrow.
c)
X is the process known as threshing whereas Y is the process known as winnowing.
d)
Both (a) and (b)
|
Rishabh Chauhan answered |
The cutting and gathering of crop after it is matured is called harvesting. After this, grains are separated from the crop by a process called threshing. Winnowing is the process of separating the hay and chaff from the grains. Harvesting is done mechanically by combine and manually by sickle.
The different steps of agricultural practices are given below randomly.
Which of the following represents the correct sequence of these practices?- a)(ii) - (iv) - (vii) - (i) - (vi) - (iii) - (viii) - (v) - (ix)
- b)(iv) - (ii) - (vii) -(i)-(vi)- (iii) -(viii) - (v) - (ix)
- c)(ii) - (vii) - (iv) - (iii) - (i) - (v) - (vi) - (viii) - (ix)
- d)(iv) - (vii) - (i) - (ii) - (iii) - (viii) - (ix) - (v) - (vi)
Correct answer is option 'A'. Can you explain this answer?
The different steps of agricultural practices are given below randomly.
Which of the following represents the correct sequence of these practices?
a)
(ii) - (iv) - (vii) - (i) - (vi) - (iii) - (viii) - (v) - (ix)
b)
(iv) - (ii) - (vii) -(i)-(vi)- (iii) -(viii) - (v) - (ix)
c)
(ii) - (vii) - (iv) - (iii) - (i) - (v) - (vi) - (viii) - (ix)
d)
(iv) - (vii) - (i) - (ii) - (iii) - (viii) - (ix) - (v) - (vi)
|
|
Shubham Sharma answered |
The measures that are taken to grow crops are called agricultural practices. Steps of agricultural practices are:
1. Soil preparation: The soil is plowed, leveled and manured before sowing the seeds.
2. Sowing: Seeds of good quality are sowed or dispersed in the soil.
3. Manuring: The nutrients are provided to the seeds at regular intervals. Manure is the decomposition product of plant and animal wastes.
4. Irrigation: The water is provided at regular intervals.
5. Weeding: Weeds or unwanted plants are removed using weedicides or removing them manually.
6. Harvesting: After the crop is fully grown, it is cut and gathered. This process is called as harvesting.
7. Storage: The harvested crop is then stored for further use or marketing.
Hence, the correct answer is Option A.
Combine is used for sowing of seeds. - a)True
- b)False
Correct answer is option 'B'. Can you explain this answer?
Combine is used for sowing of seeds.
a)
True
b)
False
|
|
Shubham Sharma answered |
Combine is machine used in harvesting crops. Combine harvest all crop easily. We don't have to work Mannualy for harvesting crops.
So, the statement that combine is used for sowing of seeds is false.
So, the statement that combine is used for sowing of seeds is false.
Which of the following is a weed?- a)Wheat
- b)Rice
- c)Maize
- d)None of the above
Correct answer is option 'D'. Can you explain this answer?
Which of the following is a weed?
a)
Wheat
b)
Rice
c)
Maize
d)
None of the above
|
|
Shubham Sharma answered |
Weeds can be defined as the unwanted plants that are grown in the field and harm the desired crops. Cyperinus is the most invasive weed found throughout the world. It is the weed of the rice field. This is the weed that is commonly found in the temperate regions.
Weedicides are used to destroy:- a)insects
- b)weeds
- c)pests
- d)none of these.
Correct answer is option 'B'. Can you explain this answer?
Weedicides are used to destroy:
a)
insects
b)
weeds
c)
pests
d)
none of these.
|
|
Jyotirmayee Sahoo answered |
Weedicides are used to kill weeds in the field
so b is the correct answer
so b is the correct answer
The last step in crop production is- a)Soil preparation
- b)Crop harvesting
- c)Irrigation
- d)Sowing
Correct answer is option 'B'. Can you explain this answer?
The last step in crop production is
a)
Soil preparation
b)
Crop harvesting
c)
Irrigation
d)
Sowing
|
Rohit Sharma answered |
The final step is Harvesting, and Sickles are usually used for harvesting.
Select the incorrect match.
- a)(i) only
- b)(ii) and (iii) only
- c)(iii) only
- d)(iii) and (iv) only
Correct answer is option 'A'. Can you explain this answer?
Select the incorrect match.
a)
(i) only
b)
(ii) and (iii) only
c)
(iii) only
d)
(iii) and (iv) only
|
|
Amit Kumar answered |
Kharif crops:
These are the crops grown in rainy season extending from june to october hence are also called as monsoon crops. These crops are totally rain dependent crops. Kharif crops include paddy, soybean, sugarcane and not wheat.
These are the crops grown in rainy season extending from june to october hence are also called as monsoon crops. These crops are totally rain dependent crops. Kharif crops include paddy, soybean, sugarcane and not wheat.
'Rabi' in Arabic means ________________- a)Autumn
- b)Summer
- c)Spring
- d)Rain
Correct answer is option 'C'. Can you explain this answer?
'Rabi' in Arabic means ________________
a)
Autumn
b)
Summer
c)
Spring
d)
Rain
|
|
Vivek Rana answered |
The crops grown in the winter season are called rabi crops. Their time period is generally from October to March. The term is derived from the Arabic word for spring, which is used in the Indian subcontinent, where it is the spring harvest (also known as the winter crop).
Read the following statements and select the correct option.Statement 1: Pheromones are used as biological method to control pest.Statement 2: Pheromones lure adult male insects into special traps and prevent them from breeding.- a)Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
- b)Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
- c)Statement 1 is true but statement 2 is false.
- d)Both statements 1 and 2 are false.
Correct answer is option 'A'. Can you explain this answer?
Read the following statements and select the correct option.
Statement 1: Pheromones are used as biological method to control pest.
Statement 2: Pheromones lure adult male insects into special traps and prevent them from breeding.
a)
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
b)
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
c)
Statement 1 is true but statement 2 is false.
d)
Both statements 1 and 2 are false.
|
|
Amit Sharma answered |
A pheromone trap is a type of insect trap that uses pheromones to lure insects. Pheromones, traps can be used to monitor target pests in agriculture or in residential areas.
Chapter doubts & questions for Crop Production and Management - Online MCQ Tests for Class 8 2025 is part of Class 8 exam preparation. The chapters have been prepared according to the Class 8 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 8 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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