Record Display for the EPA National Library Catalog


Main Title Nitrates in groundwater resulting from manure applications to irrigated cropland /
Author Walker, Wynn R.
Other Authors
Author Title of a Work
Kroeker, Bruce E.
Publisher U.S. Environmental Protection Agency, Robert S. Kerr Environmental Research Laboratory ; Center for Environmental Research Information [distributor],
Year Published 1982
Report Number EPA/600-S2-82-079
OCLC Number 09404074
Subjects Nitrates--Physiological effect ; Groundwater--United States ; Irrigation farming--United States
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-S2-82-079 In Binder Headquarters Library/Washington,DC 12/04/2017
EJBD  EPA 600-S2-82-079 In Binder Headquarters Library/Washington,DC 09/05/2018
ELBD  EPA 600-S2-82-079 AWBERC Library/Cincinnati,OH 01/03/2022
Collation 3 pages : illustrations ; 28 cm
Caption title. At head of title: Project summary. "Sept. 1982." "EPA/600-S2-82-079."
Contents Notes
"Yearling beef manure was applied in three rates and three frequencies to 57 experimental plots located within a 9.3 ha field near Grand Junction, Colorado. The basic management practices investigated were irrigation and manure loading frequency, irrigation efficiency, and manure loading rates. Climatological conditions, soil moisture, evapotranspiration, groundwater outflows, and the furrow irrigation system performance were measured in the field plots. The soil was sampled and tested for nitrate-nitrogen (NO3-N), total Kjeldahl-nitrogen (TKN), ammonium-nitrogen (NH4-N), total organic carbon (TOC) and the common salinity constituents. Vacuum extractors below the soil root zone in 10 plots were used to measure and sample the water percolating downward. Crop N-uptake was evaluated by periodic analysis of plant samples. A soil-plant-water-N simulation model reported in the literature was used to evaluate the field data and predict the conditions in the field plots. Model simulations were run for a wide range of typical Grand Junction conditions to evaluate the effect of irrigation and manure utilization practices on NOs-N contamination of groundwater. The results indicate the time required to reach a steady-state condition and the quantitative effects of irrigation efficiencies, irrigation frequency, manure loading rates, manure loading frequency, and initial soil organic matter content."