Irrigation crop coefficients for lowland rice |
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| Authors: | S Mohan N Arumugam |
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| Institution: | (1) Hydraulic & Water Resources Eng. Division, Department of Civil Engineering, Indian Institute of Technology, 600 036 Madras, INDIA;(2) Research Scholar, Hydraulic & Water Resources Engg. Division, Department of Civil Engineering, Indian Institute of Technology, 600 036 Madras, India |
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| Abstract: | Meteorological and lysimetric data for a period of nine years were used to develop crop coefficients for rice grown under lowland conditions in a sub-humid tropical climate in India. The estimated crop coefficients were found to be higher than those values recommended by FAO. A crop coefficient model with basal coefficient, moisture availability coefficient and surface wetness coefficient terms has been proposed and found suitable. On most counts, the moisture availability coefficient was found to be near unity and the wetness coefficient was found to be significant. The basal crop coefficients for lowland rice have also been presented for practical use with the proposed models. |
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| Keywords: | crop coefficients evapotranspiration irrigation regression model rice |
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