Crop Production & Management- 3 - Free MCQ Practice Test with solutions,

Let's analyze the given statements and determine their truthfulness:

(i) Growing different crops in different seasons in the same field will deplete the nutrients of the soil.
- False. Growing different crops in different seasons, known as crop rotation, generally helps maintain soil fertility by balancing the nutrient demand.

(ii) Freshly harvested grains must be dried before storing.
- True. Freshly harvested grains must be dried to reduce moisture content and prevent mold growth and spoilage during storage.

(iii) Manures are mineral specific as they provide all the minerals needed by the plant.
- False. Manures are not mineral specific; they are organic matter that enriches the soil with nutrients but do not provide all the minerals needed by plants.

(iv) Broadcasting of seeds is done by seed drill.
- False. Broadcasting is a method of sowing seeds by scattering them over the soil surface, while a seed drill is a tool that places seeds at specific depths and intervals in the soil.

Therefore, the correct identification of true (T) and false (F) statements is:
(i) F
(ii) T
(iii) F
(iv) F

To correctly match the terms in Column I with their related descriptions in Column II, let's understand each term:

• (a) Weeding: The process of removing unwanted plants (weeds) from a field.
• (b) Threshing: The separation of grain from the chaff after harvesting.
• (c) Tilling: The loosening and turning of the soil before sowing seeds.
• (d) Harvesting: Cutting and gathering the mature crop from the field.

Hence, the correct matching is:

(a) - (ii), (b) - (iv), (c) - (i), (d) - (iii)

This corresponds to option C.

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.

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 given agricultural tool is hoe which is used for removing weeds and for loosening the soil. It has a long rod of wood or iron. A strong broad and bent plate of iron is fixed to one of its ends and works like a blade. It is pulled by animals.

Manure is not nutrient specific. It only removes the general deficiency of soil. Manures enhance the water holding capacity of soil, increase the number of friendly microbes and improve the texture of the soil.

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.

Correct Answer :- b

Explanation : Chain pump, dhekli and pulley system are traditional methods of irrigation while drip system is the modern method of irrigation. Urea, potash, ammonium sulphate are fertilisers while oxychloride is not a fertiliser. Khurpi, weedicides and seed drill are used in weeding while silos are used in storing food grains. Sowing, irrigation and harvesting are agricultural practices while hybridisation is not. 2, 4 - D, MCPA and butachlor are herbicides while BHC is an insecticide.    

Metolachlor, simazine, MCPA, butachlor, 2, 4-D and dalapon are weedicides.

Soybean has been grown as a cash crop as tofu and soy oil are obtained from it. Soybean plants are legumes. They have bacteria on nodules of the roots of the plant. These bacteria help in nitrogen fixation. Crop rotation of soybean legume is done with grass crops like corn or wheat. This is because the nutrient requirements of grass crop are fulfilled by the soybean crop. Growing soybean crop provides nitrogen-fixing bacteria in the soil which helps the growth of grass crop in the successive year.

Pongal, Baisakhi,Onam,Makar Sankranti are the festivals associated with harvest season while Christmas and Eid are not associated with harvest season.

Loose smut of wheat is caused by fungus Ustilago tritici, early blight of potato is caused by fungus Alternaria so/an/ and late blight of potato is caused by fungus Phytophthora infestans. Citrus canker is a bacterial disease caused by bacterium Xanthomonas.

Water logging decreases the amount of salts in the soil that reduces soil fertility. Fertilisers are soluble in water, they are directly absorbed by plants and greatly increase crop yield. The practice of growing two or more dissimilar crops in the same field simultaneously is called mixed cropping.

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 given pot X, Y and Z contains green manure, manure and fertiliser respectively. Green manures and manures replenish soil with nutrients while fertiliser has no role in replenishment of nutrients.

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.

• 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.