Mineral Nutrition

Mention the artificial methods involved in the restoration of soil fertility.

Artificial methods That restore the fertility of soil are :

(1) By adding farm yard manure or animal excreta to the soil.

(2) By adding fertilizers, manure.

(3) By green manuring.

(4) By crop rotation.

(5) By controlling over-grazing.

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Give the role of minerals.

Mention the significance and disdvantages of hydroponics.

Write the various natural methods involved in the replenishment of the soil fertility.

List the criteria for essentiality of elements.

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