| Title: | Economic and environmental impacts of pasture nutrient management |
| Authors: | Osei, E., P.W. Gassman, L.M. Hauck, S. Neitsch, R.D. Jones, J. Mcnitt and H. Jones |
| Year: | 2003 |
| Journal: | Journal of Range Management |
| Volume (Issue): | 56(3) |
| Pages: | 218-226 |
| Article ID: | |
| DOI: | 10.2307/4003810 |
| URL (non-DOI journals): | https://journals.uair.arizona.edu/index.php/jrm/article/view/9795 |
| Model: | SWAT |
| Broad Application Category: | hydrologic and pollutant |
| Primary Application Category: | model and/or data interface |
| Secondary Application Category: | pollutant cycling/loss and transport |
| Watershed Description: | 1,270 km^2 Lake Fork Reservoir drainage area, which drains parts of Hopkins, Hunt, Rains, and Wood counties in northeast Texas, U.S. |
| Calibration Summary: | Tabular comparisons between simulated and measured mean flows and pollutant losses are reported. |
| Validation Summary: | |
| General Comments: | SWAT was interfaced with the APEX and FEM models to evaluate the impacts of several pasture-based dairy scenarios in the watershed. The scenarios pasture stocking density adjustments and changes in in fertilizer rates applied to the pastures, to depict different N and P rate scenarios. Significant reductions in nutrient losses were predicted for the scenarios; the greatest was 54 & 13% for soluble & organic losses when P was assumed to be totally plant available. |
| Language: | English |
| Keywords: | stocking density, manure, nutrient losses, nitrogen, phosphorus, economics |