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This article in SSSAJ

  1. Vol. 39 No. 1, p. 107-111
     
    Received: July 11, 1974
    Accepted: Sept 17, 1974


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doi:10.2136/sssaj1975.03615995003900010029x

The Nitrogen Status Beneath Beef Cattle Feedlots in Eastern Nebraska1

  1. J. R. Ellis,
  2. L. N. Mielke and
  3. G. E. Schuman2

Abstract

Abstract

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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