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6Allen R G. Using the FAO-56 dual crop coefficient method ove ran irrigated region as part of an evapotranspiration intercompar- ison study[J]. Journal of Hydrolygy, 2000,229:27 41.
7TYAGI N K, SHARMA D K, LUTHRA S K. Evapotranspiration and cropcoe{ficients of wheat and sorghum[J]. Journal of irrigation and drainage engineering, 2000, 126(4):215 -222.
8ALLEN R G. Using the FAO - 56 dual crop coe{ficient method overan irrigated region as part o{ an evapotranspiration intercomparison study[J]. Journal o{ Hydrolygy, 2000, 229:27 - 41.
