Answers these questions:

1. How manure is different from fertilizer?
2. What are weeds? Give two examples.
3. Why irrigation is important for crops?
4. How can we control pests from damaging crops?

Dear Student,

1.

Manure	Fertilizer
Manures are relatively less rich in plant nutrients.	Fertilizers are very rich in plant nutrients like nitrogen, phosphorus and potassium
Manure would be more better in the long run because manure contain organic materials	Fertilizers contain chemical substances which when used in excess become harmful to the consumers
Do not cause water pollution	Fertilizer run off from the fields also causes water pollution.
It is not costly	It is costly

2. Undesirable plants that grow along with crop plants are known as weeds. Xanthium, Parthenium, etc. are some common weeds. Weeds compete with the crop for nutrients, light, and space. As a result, crop plants get lesser nutrients, light, and space for their development. This in turn, reduces their productivity. Thus, various weeding methods are employed.

3. The importance of irrigation for crops are:
1) It helps to maintain moisture in the soil which is necessary for the germination of seeds.
2) It is required for the growth of the roots of the plant.
3) It is essential for the absorption of nutrients from the soil.
4) It provides the plant with hydrogen and oxygen
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