01151naa a2200265 a 450000100080000000500110000800800410001910000190006024500580007926000090013752005070014665000130065365000130066665000100067965000170068965000120070665000160071865000170073465000100075165300120076165300150077370000200078870000170080877300600082510759661996-02-08       1989    bl ---       0--  u    #d1 aBRONSON, K. F.  aN Leaching under winter wheat minimal on sandy soils.  c1989  aConcern over groundwater contamination from agricultural chemicals has increased in recent years, and nitrates from heavy nitrogen fertilizer applications on small grain are a frequently accused culprit. However, tests by the Alabama Agricultural Experiment Station indicate that leaching of nitrogen (N) fertilizers is not a major problem. Nitrates leached into the subsoil by N fertilizers are in the tenths of a part per million range and nitrate from organic matter is only a few parts per million.  aleaching  anitrogen  awheat  aLixiviação  aNitrato  aNitrogênio  aSolo Arenoso  aTrigo  aNitrate  aSandy soil1 aTOUCHTON, J. T.1 aHAUCK, R. D.  tHighlights Agricultural Researchgv.36, n.4, p.7, 1989.