Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50274#.VDNjQFfHRK0 Author(s) Nithya Rajan 1* , Stephan J. Maas 2 Affiliation(s) 1 Texas A & M AgriLife Research and Extension Center, Vernon, Texas, USA . 2 Texas Tech University and Texas A & M AgriLife Research Center, Lubbock, Texas, USA . ABSTRACT While the amount of water used by a crop can be measured using lysimeters or eddy covariance systems, it is more common to estimate this quantity based on weather data and crop-related factors. Among these approaches, the standard crop coefficient method has gained widespread use. A limitation of the standard crop coefficient approach is that it applies to “standard conditions” that are invariant from field ...
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