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ARS Home » Southeast Area » Auburn, Alabama » Soil Dynamics Research » Research » Publications at this Location » Publication #348077

Research Project: Enhancing Production and Ecosystem Services of Horticultural and Agricultural Systems in the Southeastern United States

Location: Soil Dynamics Research

Title: Gypsum as a best management practice for reducing P loss from agricultural fields

item Watts, Dexter
item Torbert, Henry - Allen

Submitted to: Waste to Worth Conference
Publication Type: Abstract Only
Publication Acceptance Date: 4/17/2017
Publication Date: 4/17/2017
Citation: Watts, D.B., Torbert III, H.A. 2017. Gypsum as a best management practice for reducing P loss from agricultural fields [abstract]. Waste to Worth Conference, April 17-21, 2017, Raleigh, North Carolina. CDROM.

Interpretive Summary:

Technical Abstract: Phosphorus loss from agricultural fields fertilized with poultry litter (PL) may contribute to eutrophication of nearby rivers, lakes, and streams. It has been suggested that gypsum can be used as a soil amendment to reduce P loss from these fields. Also, a new USDA-NRCS National Conservation Practice Standard 333 “Amending Soil Properties with Gypsum Products” has recently been created to promote conservation through gypsum use. Thus, the objective of this presentation is to discuss research findings from a series of studies evaluating the effectiveness of gypsum as a management tool to reduce P losses from agricultural fields. Results from these studies showed that gypsum can reduce the loss of dissolved P with surface water runoff from both pastures and row crop systems. In addition, these studies showed that applying gypsum to grass buffer strips at the edge of an agricultural field could also be an effective management practice for P reduction. These findings suggest that gypsum use as a soil amendment has promise as a best management practice for reducing P losses from agricultural fields.