Crop Improvement | Improvement in Food Resources | Assessment | English | Grade 9

Which of the following is rich in carbohydrates?

• Spinach

• Wheat

• Apples

• Eggs

Answer explanation

Wheat is rich source of carbohydrates. Spinach and apples are rich in vitamins and minerals Eggs are rich source of proteins

How does the presence of weed affect the plant?

• Weed takes essential nutrients from soil thereby creating scarcity of nutrients for the crops

• Kills the crops

• Stops the growth of plant

• All of these

Answer explanation

Weeds acquires essential nutrients from the soil. Thus, crops don't get right amount of nutrients, hence quality of crops decreases & they may eventually die. If there are excess of weeds, then more amount of nutrients will be taken away, which may stop the growth of plants. Lack of nutrients may even kill the crops.

Choose the correct sentence regarding manure among the following.

• Manure increases water holding capacity of the soil

• If used in excess it causes pollution

• Helps in draining out excess of water from soil

• all of these

Answer explanation

Manure improves water holding capacity of soil, hence it is not responsible for draining out excess of water from the soil. Also use of manure is environment friendly, i.e. it does not cause pollution.

Which of the following plant provides us with essential fats?

• Rose

• Moong

• Soyabean

• Coriander

Answer explanation

Soyabean provides us with fats in the form of oil.

Fertilizers do not contain ____.

• Nitrogen

• Phosphorus

• Potassium

• Iron

Answer explanation

Fertilizers contain N,P,K i.e. Nitrogen, Phosphorus and Potassium. They do not contain iron.

Crop improvement can be done by

• increasing crop variety

• increasing crop production

• both 1 and 2

• Neither 1 nor 2

Answer explanation

Crop improvement can be done by increasing crop variety as well as increasing crop production.

Chandu wants to store the grains of his field. What measures should he take to avoid damage to the grains.

• Keep the granary clean

• Spray insecticides and fungicides

• Dry the grains in the sun

• all of these

Answer explanation

To store grains for longer time, one should- Dry grains in the sun. Keep the granary clean. Spray insecticides and fungicides.