The Nitrogen Status Beneath Beef Cattle Feedlots in Eastern Nebraska
1975
Ellis, J. R. | Mielke, L. N. | Schuman, G. E.
Soil cores (129) were taken from 15 eastern Nebraska feedlots in the Elkhorn and Platte river valley areas. The sites represented a wide range of conditions from small farm feedlots to large commercial operations. Most feedlots did not constitute a nitrate pollution hazard to ground water. Upland feedlots, with slopes >5%, contained less than 10 ppm NO₃⁻-N in the ground water; however, slopes <5% had increased frequency of NO₃⁻-N in the ground water. Only one river-valley feedlot ground-water sample exceeded 10 ppm NO₃⁻-N. Problems of ground water with > 10 ppm NO₃⁻-N were localized. The feedlot and cropland conditions examined and ranked according to decreasing average NO₃⁻-N in the core were: abandoned feedlot > feedlot-cropland > upland feedlot > corn (Zea mays L.) > river-valley feedlot > profiles under feedlot mounds > alfalfa (Medicago sativa L.) > grassland.
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