Question

Explain the role of any two macro nutrients and any two micro nutrients and their deficiency symptoms

Answer 1

Nitrogen (N)

Function:-Nitrogen is the most critical nutrient for optimum farm production. Since it is readily leached from the soil, its level in soil is typically low, however the levels required for optimum crop growth are quite high and thus generous application is typically required. Nitrogen reduces all aspects of crop and pasture production e.g. growth, yield and quality.

Symptoms of Deficiency :-Plants which have Nitrogen for only limited growth, may exhibit chlorosis especially in the older leaves. In severe cases, the leaves first yellow and then tan as they die. Some plants (tomatoes, maize) may exhibit a purplish colouration of the stems, petioles and on the underside of their leaves .