Iron is most commonly used on sugar beets, corn for grain, pears, dry peas, onions, fresh sweet corn, cherries and apples. Copper and manganese are used on crops such as pears, corn for silage, alfalfa hay, peppermint and grapes. Plant micronutrients include boron, chlorine, cobalt, copper, iron, manganese, molybdenum, sodium and zinc. Only copper, iron, manganese and zinc were surveyed. Micronutrients are essential for plant growth, metabolism and overall plant health.
Micronutrient deficiencies can cause problems with leaf and stem growth and fruit production.
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