A farmer adds/supplies Na, Ca, Mg and Fe regularly to his field and yet he observes that the plants show deficiency of Ca, Mg and Fe. Give a valid reason and suggest a way to help the farmer improve the growth of plants.

(i) The deficiency of any element can cause multiple symptoms. (ii) Same symptoms may be caused by the deficiency of one or several different elements. (iii) The concentration of the essential element below which plant growth is retarded is termed as critical concentration. Chlorosis is the loss of chlorophyll due to deficiency of N, K, Mg, Fe, S, Mn, Zn Mo. Different plants respond differently to the deficiency of the same element. How many of the above statement are correct?

GM plants are useful in many ways. How would you convince farmers to grow GM plants on their field ? Explain giving three reasons.

GM plants are useful in many ways. How would you convince farmers to grow GM plants on their field ? Explain giving three reasons.

A farmer is interested to cultivate cucumber plants in his field. Then suggest him the correct plant growth regulator which can induce more number of female flowers in those plants?

A farmer observed drops of water along the margins of leaves of tomato plants growing in his well irrigated field on a winter morning. Give reasons for this occurrence. Why the water drops appeared only along the leaf margins?

A farmer is growing a crop regularly in his field. He uses chemical fertilizers, pesticides, organic manure as well as bio-fertilizers. Very close to his field is a factory which emits smoke as a by product. There is also a huge lake in the nearby area. A considerable increase in plant life in the lake was noticed after the farming activity intensified. The most likely reason for this could be:

A farmer is growing a crop regularly in his field. He uses chemical fertilizers, pesticides, organic manure as well as bio-fertilizers. Very close to his field is a factory which emits smoke as a by product. There is also a huge lake in the nearby area. Consider the following food chain in the same lake. Aquatic plant to Small fish to Big fish to Birds Which of the above organisms is likely to show minimum amount of pesticide concentration in them after considerable time?