Agricultural and Biosystems Engineering Publications
Document Type
Article
Publication Version
Published Version
Publication Date
2015
Journal or Book Title
Applied Engineering in Agriculture
Volume
31
Issue
4
First Page
611
Last Page
620
DOI
10.13031/aea.31.11128
Abstract
Accumulation of phosphorus in soil is a major factor limiting the operational life (period of time where the soil can serve as an effective phosphorus sink) of land application waste disposal systems. Better evaluation of phosphorus operational life requires improved understanding of how manure application to soil can affect its phosphorus sorption characteristics. In this study, laboratory experiments were conducted to investigate the impact of feedlot runoff effluent application on phosphorus sorption capacities, equilibrium phosphorus concentrations, and phosphorus buffering capacities of six Iowa soils. Soil samples were collected from vegetative treatment areas that had received feedlot runoff application for the previous five years and from a paired grassed area that did not. Subsamples of each soil were incubated with a series of 12 phosphorus solutions ranging in concentration from 0 to 200 mg P/L to determine the sorption characteristics and results fitted to the Langmuir model to determine the phosphorus equilibrium concentration, phosphorus buffering capacity, and maximum phosphorus sorption capacity. Results indicated that vegetative treatment areas generally had elevated phosphorus equilibrium concentrations, indicating an elevated risk of loss of dissolved phosphorus. In most cases, the ability of the soil to sorb phosphorus was significantly increased, as was the remaining phosphorus sorption capacity of the soil. These results indicate that vegetative treatment area life could be greatly extended due to soil property modifications that occur as a result of system operation.
Access
Open
Copyright Owner
American Society of Agricultural and Biological Engineers
Copyright Date
2015
Language
en
File Format
application/pdf
Recommended Citation
Andersen, Daniel S.; Helmers, Matthew J.; and Burns, Robert T., "Phosphorus Sorption Capacity of Six Iowa Soils before and after Five Years of Use as Vegetative Treatment Areas" (2015). Agricultural and Biosystems Engineering Publications. 653.
https://lib.dr.iastate.edu/abe_eng_pubs/653
Included in
Agriculture Commons, Bioresource and Agricultural Engineering Commons, Environmental Indicators and Impact Assessment Commons
Comments
This article is from Applied Engineering in Agriculture 31 (2015): 611–620, doi:10.13031/aea.31.11128. Posted with permission.