Q4 of 67 Page 412

In agricultural practices, instead of fertilizers, manures should be commonly employed. Give one reason.

In agricultural practices, instead of fertilizers, manures should be commonly employed because the Continuous use of fertilizers in an area can destroy soil fertility as the organic matter in the soil is not replenished and it also affects various microorganisms present in the soil which are beneficial for maintaining soil quality.


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2

Micronutrients are required by plants in smaller quantities. From the list given below, select only micronutrients required by plants.

N, P, K, Ca, Mg, S, Zn, Cu, Mb and Cl–

 3

Why some plants like sunhemp or guar and grown and mulched by ploughing into the soil before sowing of the crop seeds?

 5

Organic farming is an environment friendly farming system. Mention one advantage supporting the above claim.

 1

Give any one advantage of irrigation.