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reason to believe your crops need molybdenum, you <br />can try planting a test plot with molybdenum additions. <br />• how much molybdenum is <br />needed? <br />As with all trace elements, the amount of molybde- <br />num needed is very small and varies with the crop. <br />Legumes, for instance, require five times as much <br />molybdenum as grasses. A typical supplemental mo- <br />lybdenum addition for legumes might be about half a <br />pound of molybdenum in the form of sodium molyb- <br />date per acre. The cost is negligible compared with <br />the results. There are some indications that tropical <br />soils will require much higher molybdenum supple- <br />ments. <br />• how is molybdenum added? <br />On large seeded legumes such as soybeans and <br />peas, seed treatment provides an economical and <br />effective method of supplementing the crops' molyb- <br />denum requirements. Liquid or dry fertilizers can be <br />formulated to contain molybdenum so molybdenum <br />can be added along with the regular fertilizer pro- <br />gram. Foliar sprays are used to eliminate molybde- <br />num deficiency in citrus crops and frequently these <br />sprays are used on other crops where deficiencies <br />are apparent or anticipated. <br />• what about excessive <br />molybdenum? <br />Under exceptional conditions, as in areas of Western <br />United States, there may be sufficient excess molyb- <br />denumavailable in the soil to have adisadvantageous <br />effect on some animals, particularly ruminants. The <br />excess molybdenum produces a copper deficiency <br />and is normally treated by copperglycinate injections. <br />