Influence of “Pop-up” Fertilizers on Soybean Stands and Yield1
- J. G. Clapp and
- H. G. Small2
Both liquid and granular fertilizers containing nitrogen, phosphorus, and potassium were applied directly in the seed zone of soybeans (Glycine max (L.) Merrill) at planting. An application of 35.5 liters/ha (3.8 gallons/acre) of a liquid 5.0-8.8-4.2 (N-P-K) “popup” fertilizer reduced stands by 57.8% and yields by 20.3%. Plant stands were reduced when only 11.2 kg/ha (10 lb/acre) of a granular 10-15-5 (N-P-K) “popup” fertilizer was applied in the seed zone at planting.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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