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Science 15 April 1966:
Vol. 152. no. 3720, pp. 346 - 347
DOI: 10.1126/science.152.3720.346
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Articles

Tracers Determine Movement of Soil Moisture and Evapotranspiration

U. Zimmermann 1, K. O. Münnich 1, W. Roether 1, W. Kreutz 2, K. Schubach 2, and O. Siegel 3

1 C-14 Laboratorium, Zweites Physikalisches Institut, University of Heidelberg, Germany
2 Agrarmeteorologische Forschungsstelle, Deutscher Wetterdienst, Giessen (Hessen)
3 Landwirtschaftliche Untersuchungsund Forschungsanstalt, Speyer (Rhein)

The downward movement of water in soil is a layered one. Marking a certain layer with hydrogen-isotope tracer, and watching its displacement, makes possible a water balance and gives information on evaporation and groundwater recharge.


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