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Using Soil Phosphorus Measurements to Assess the Effectiveness of Subsurface-Band Application of Broiler Litter in Reducing Phosphorus Leaching

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Transactions of the ASABE. 61(1): 133-138. (doi: 10.13031/trans.12496) @2018
Authors:   Jasmeet Lamba, Puneet Srivastava, Subhasis Mitra, Thomas R. Way
Keywords:   Leachate, Manure, Nutrient management, Phosphorus, Surface runoff, Water quality.

Abstract. Excessive delivery of phosphorus (P) from agricultural landscapes to surface waters results in water quality impairment. The method of application of broiler litter to agricultural fields significantly affects P loss to surface waters via surface and subsurface flow pathways from agricultural landscapes. Subsurface-band application of broiler litter can help reduce P loss in surface and subsurface flows. Typically, leachate samples are collected using lysimeters or subsurface flows are sampled to assess the effectiveness of subsurface-band application of broiler litter in limiting P mobility. In this study, we tested a simple and inexpensive method of assessing effectiveness of subsurface-band application of broiler litter using ortho-P (PO4-P) measurements in soils. This method of measuring PO4-P concentration in soils showed that subsurface-band application of broiler litter helps to reduce P leaching, whereas surface application of broiler litter was not effective in reducing P leaching. The results of this study show that soil PO4-P measurements can be successfully used to assess the effectiveness of subsurface-band application of broiler litter in reducing P leaching.

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