Heena Sharma, Shubhankat Vats and, Rashmi Gupta Solutions for Chapter: Improvement in Food Resources, Exercise 7: CHAPTER EXERCISE

In the last few decades, the production of food from animal sources has increased. Justify this statement.

What is bee-keeping? Which variety of bee is commonly used for commercial honey production?

How can poultry and fish farming help in solving the food and nutrition problem?

Differentiate between pathogens and pests. How does an insect-pest attack the plants?

Mention any two desirable agronomic characters for crop improvement. Explain how farmers get desired characters incorporated into the new varieties produced. List two condition necessary for the new varieties to be accepted.

A farmer is advised to use manure instead of fertiliser in his fields. List any two advantages that the farmer will get if he accepts this advice. How is the use of manure particularly useful for clayey and sandy soil?

There is a water reservoir (river) near a village. Due to insufficient rain, farmers are worried about their crops. Suggest and explain the irrigation practice that can be adapted to supply water to the entire agricultural land in the village.

Explain composite fish culture system with examples. State the major problem associated with this system. Can fish culture be done in any type of combination? If yes, explain.