Soybeans require large quantities of nitrogen, phosphorous and potassium. Most of the nitrogen needed is obtained from the atmosphere. Phosphorous and potassium recommendations will vary according to potential yield goal and the soil?s ability to supply nutrients to the crop. Soybeans remove approximately .90 pounds of phosphorous and 1.50 pounds of potassium per bushel of grain. It is important to supply the soybean crop with the appropriate amount of phosphorous and potassium to achieve the potential yield goals.
To maximize soybean yields, your soil test should indicate that your soil is at optimum level for pH, phosphorous and potassium. Then apply the recommended amount of phosphorous and potassium based on grain removal for yield goal.
The calculator below will assist you to determine the recommended amount of phosphorous and potassium needed based on grain removal only.
For Soybean Grain Removal "Click" on the Picture or http://www.mfa-inc.com/Crops/Soybeans/AgronomyTips.aspx