It is well known that micronutrients are equally important for plant growth and development, but they are required by plants in small quantities. If they are taken in excess amount, especially in soils having deficiency of major nutrients, they are harmful to plants. If micronutrients are applied in excess amount, they may produce a harmful level in soils, which may be more difficult to correct than a deficiency. Their deficiency can be determined bot by plant and soil tests. So, is that necessary to conduct an experiment to determine an appropriate rate or amount for micro-nutrients?

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