Test: Crop Production and Management- 1 - Class 8 MCQ

• Plants contain nearly 90% water, which is essential for their growth and development.
• Water helps in transporting nutrients to different parts of the plant and is crucial for their overall health.

• Linseed is not classified as a Kharif crop; it is a Rabi crop grown in the winter season from October to March.
• Kharif crops like paddy, maize, and groundnut are typically sown in the rainy season from June to September.

• The seed drill offers multiple advantages in agriculture.
• It helps avoid overcrowding by sowing seeds at proper distances, ensuring that plants receive adequate sunlight and nutrients. It also reduces the time and labor required for sowing, making the process more efficient.
• Additionally, the seed drill covers the seeds with soil after sowing, which protects them from damage by birds and other pests. Thus, all the listed benefits are advantages of using a seed drill.

• Before growing a crop, it's essential to prepare the soil so that the roots can grow deep and strong.
• When the soil is loose and turned, roots can easily go deep inside and get the nutrients they need to grow well.
• This helps the plants become healthy and produce good crops.

• Mustard is typically sown in the winter season, classifying it as a Rabi crop.
• Rabi crops, including wheat, gram, and pea, are grown from October to March.
• This season provides the cool temperatures needed for these crops to thrive.

• Kharif crops are the ones that are sown during the rainy season in India.
• These crops include rice, maize, soyabean, groundnut, and cotton.
• Farmers plant these crops when the monsoon arrives to ensure a good harvest. 

• Cutting the crop is the first operation in the harvesting process.
• Separation of grain from chaff by blowing a current of air through the grain is called winnowing.
• The process of detaching the grains from the ear head, cob or pod is called threshing. It is basically the removal of grains from the plant by striking, treading or rupturing.

• 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.

• Cod liver oil is indeed a rich source of Vitamin D and is derived from the liver of cod fish.
• This oil is commonly used as a dietary supplement to support bone health and immune function due to its high Vitamin D content.
• It also provides other nutrients such as Vitamin A and omega-3 fatty acids, making it beneficial for overall health.
• So, the given statement is True.

Weeding is necessary because weeds compete with crop plants for essential resources such as sunlight, water, space, and nutrients. These resources are vital for the growth and development of crops, and the presence of weeds can reduce the availability of these resources to the crop plants, ultimately affecting their yield.

• Animal husbandry involves the scientific management of various aspects related to the care and breeding of livestock.
• This includes animal breeding (i), managing animal livestock (iii), and rearing animals (iv).
• These practices focus on improving the health, productivity, and overall management of farm animals.
• The culture of animals (ii) is more related to broader animal care practices rather than the specific management focus of animal husbandry.
• Therefore, option D correctly lists the components of animal husbandry.

• Grains are dried before storage to stop bugs and tiny living things from ruining them.
• When grains have too much water in them, insects and germs can spoil them.
• Drying the grains helps to keep them safe from harm, so they stay good to eat for a longer time.

• The last step in crop production is crop harvesting.
• This step follows all the preparatory and growing stages, including soil preparation, irrigation, and sowing.
• Harvesting is the process of gathering the mature crops from the fields, which is essential to complete the crop production cycle and obtain the final yield.
• Therefore, option B is the correct answer.

• The primary purpose of ploughing is to turn over the upper layer of the soil, bringing fresh nutrients to the surface, while burying weeds and the remains of previous crops and allowing them to break down.
• Ploughing enhances the water retention capacity of the soil.

• Modern ploughs are increasingly being made of iron, replacing the traditional wooden ploughs.
• Iron ploughs are more durable and efficient, allowing for better soil preparation and increased longevity compared to their wooden counterparts.

• It is important to remove weeds from the field so that they don't compete with the crop plants for things like water, nutrients, space, and sunlight.
• This competition can make it hard for the crop plants to grow well.
• When we remove the weeds, the crop plants have more space and resources to grow nicely.

Excessive use of fertilizers can lead to water pollution. When fertilizers are used in high quantities, they can wash into water bodies through runoff, causing nutrient overload that leads to problems such as algal blooms. These blooms deplete oxygen in the water, harming aquatic ecosystems. While fertilizers boost crop yield, their overuse poses significant environmental challenges.