soybean, turkey litter, fertilizer, residual, tillage
Soybean yields measured from 2014 through 2016 were more than 50% greater from the residual from N-based turkey litter applications during 2011 through 2013 than in the control where no nitrogen (N) or phosphorus (P) was applied. However, residual from P-based turkey litter applications or fertilizer-only did not result in soybean yield different from the no N-P control. This residual effect on yield was largely due to increased pods per plant.
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Sweeney, D. W.; Barnes, Philip; and Pierzynski, Gary
"Response of Soybean Grown on a Claypan Soil in Southeastern Kansas to the Residual of Different Plant Nutrient Sources and Tillage,"
Kansas Agricultural Experiment Station Research Reports: