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1Field investigation of water and nitrate-nitrogen movement in Yolo soil(in California) Field investigation of water and nitrate-nitrogen movement in Yolo soil(in California)by Nielsen, D.R., Joint FAO/IAEA Div. of Atomic Energy in Food and Agriculture, Vienna (Austria) eng, Research Co-ordination Meeting on Soil Nitrogen as Fertilizer or Pollutant eng 3 Jul 1978 Piracicaba (Brazil), Biggar, J.W., MacIntyre, J., Tanji, K.K., Gesellschaft fuer Strahlen- und Umweltforschung G.m.b.H., Munich (Germany, F.R.) oth
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