IV. Question - Answer
1. Define crop ?Name the various types of crops. What
are Kharif and Rabi crops ?
2. Describe the mechanism of crop variety improvement.
3. How are minerals
replenished in the soil of a crop field ?
4. What is organic farming? What are its advantages?
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Answers
1)Crops are living plants grown by farmers. Most crops are foods such as grain, vegetables, or fruit. Some crops are for drugs, such as quinine, or fibers such as cotton, or other materials such as rubber or wood. Farms are usually made to grow just one kind of crop.
2) ans: HYBRIDIZATION - it is a process of crossing between two or more genetically dissimilar plants to produce a new variety with good properties of both the crops. ii. GENETIC IMPROVEMENT-: In genetic improvement, genes of crops are modified so that desired properties are retained and undesirable properties are suppressed.
4)Advantages of organic farming
Farmers can reduce their production costs because they do not need to buy expensive chemicals and fertilizers. Healthier farm workers. In the long term , organic farms save energy and protect the environment. It can slow down global warming. Fewer residues in food.
Answer:
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