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Sampling stage and plant part sampled to determine micronutrient sufficiency in field and horticultural crops

Plant tissue testing requires the selection of the appropriate plant part at best stage of growth when it contains higher content of nutrients. The paper discusses the appropriate stage of growth and plant part to sample for a variety of crops. Micronutrient concentrations were consistently higher in leaves than in any other part of the plant. Leaf sheath in cereals and stems in dicots contained the least amount of nutrients. It is recommended that recently matured leaves in cereals and Brassica spp., young leaves in soybeans and potatoes, and entire plant tops at the 10% bloom stage for forage legumes be sampled to determine the micronutrient nutrient status of these crops.