Response of soybean and lentil to a seed-row placed nitrogen- phosphorus fertilizer blend in a Brown Chernozem in south-central Saskatchewan
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Pulse crops are able to supply their nitrogen requirement through fixation in symbiosis with rhizobia bacteria, but a small amount of nitrogen may be desirable to carry the crop until the fixation process establishes. Guidelines exist for the maximum safe rates of phosphorus fertilizers alone and in combination with potash for common pulse crops such as peas, however, there is little or no information on the tolerance of pulse crops to a seed-placed fertilizer blend that contains monoammonium phosphate (MAP) plus a high analysis N product like urea. This presentation covers the results of a field trial to investigate the response of soybean and lentil to different rates of a 50:50 blend of MAP and urea on emergence, grain and straw yield, N and P uptake, and nitrogen fixation by the crop.
Part OfSoils and Crops Workshop
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