Plant nutrition is the process which involves taking up of materials from soil and atmosphere and utilizing those materials for the manufacturing of food as well as growth, development and reproduction.
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43.Write a note on symbiotic nitrogen fixation.
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44.Whiptail of cauliflower is caused by the deficiency of which element ?
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45.Write the various natural methods involved in the replenishment of the soil fertility.
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46.Deficiency of zinc causes which disease in cereals ?
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47.Mention the artificial methods involved in the restoration of soil fertility.
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48.List the criteria for essentiality of elements.
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49.Why do plants need potassium and magnesium ?
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50.Explain chlorosis and give its cause. Describe the role of copper.
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