The nutrient elements which are required comparatively in small quantities are called as micro or minor nutrients or trace elements. The essential micronutrients include nutrient elements like zinc, iron, manganese, molybdenum, copper, boron and chlorine and are essentially as important as macronutrients to have better growth, yield, and quality in plants. The major causes for micronutrient deficiencies are intensified agricultural practices, unbalanced fertilizer application including NPK, depletion of nutrients and no replenishment and fruit growing in marginal and sub marginal soils.

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