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United States Department of Agriculture

Agricultural Research Service

Research Project: Conservation Systems Research for Improving Evnironmental Quality and Producer Profitability

Location: Soil Dynamics Research

Title: Comparison of soil applied flue gas desulfurization (FGD) and agricultural gypsum on soil physical properties

item Arriaga, Francisco
item Watts, Dexter
item Torbert, Henry - Allen

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 10/21/2012
Publication Date: 10/21/2012
Citation: Arriaga, F.J., Watts, D.B., Torbert III, H.A. 2012. Comparison of soil applied flue gas desulfurization (FGD) and agricultural gypsum on soil physical properties. ASA-CSSA-SSSA Annual Meeting Abstracts. CDROM.

Interpretive Summary:

Technical Abstract: Gypsum can come from different sources. Agricultural gypsum is typically mined and used to supply calcium to crops. Flue gas desulfurization (FGD) gypsum is a by-product of coal power plants. Although their chemical formulas are the same, different trace elements and materials are present in them. Both types of gypsum can be applied to agricultural soil as amendments; however, questions remain if their effects on soils are similar. The purpose of this study was to determine the effects of different rates of FGD gypsum application to soil, and compare it to agricultural gypsum, fly ash and lime. Soil samples for bulk density and aggregate stability analysis were collected three years after application to a Bermudagrass (Cynodon dactylon L.) hay stand. Additionally, soil electrical conductivity and penetration resistance were measured. Preliminary results show that FGD gypsum has a less pronounced impact on soil physical properties compared to agricultural gypsum. Results of this work will help determine the effects and benefits of FGD gypsum application to soil.

Last Modified: 10/18/2017
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