Q1 of 67 Page 412

Name the nutrients provided by air and water.

Nutrients supplied by air:
-Oxygen(O2)
-Carbon(C)
Nutrients supplied by water:
-Hydrogen (H)
-oxygen(O2)


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4

Identify the cross performed between two plants belonging to different species.

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Name three factors for which crop variety is improved.

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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–

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