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16 Most profitable nitrogen rate depends on soil, rainfall, plant population, and cultural practices with 120 lbs nitrogen per acre suggested for most soils. For very sandy soils where the yield potential is 80 bushels per acre or less, 100 lbs nitrogen per acre rate is adequate. In river bottoms or locations where yields of 130 bushels per acre or more are often obtained, apply 150 lbs nitrogen per acre. 17 Preplant by broadcasting or at planting, 30 to 40 lbs nitrogen per acre banded by the row. Sidedress balance of nitrogen when the plants are 18 to 30 inches tall. Following soybeans or other legumes in rotation, reduce the nitrogen rate by 20 to 30 lbs nitrogen per acre. 25 Broadcast recommended phosphate and potash fertilizer, and magnesium-, zinc- and sulfur-containing fertilizer when recommended, during land preparation prior to planting. 28 This is a boron sensitive crop. Apply 0.5 lbs boron per acre in fertilizer. (Recommended when soil test boron is less than 3.0 lbs per acre) 64 This is a zinc sensitive crop.
Fertilizer should contain sufficient zinc to supply 5 to 10 lbs zinc per acre if
soybeans is following crop. (When soil test zinc is not excessive)
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