Venkatachari, A. and Reddy, K.A. (1978) Relationship of evapotranspiration with pan evaporation and evaluation of crop coefficient. Acta Agronomica Academiae Scientiarum Hungaricae, 27 (1-2). pp. 107-110.
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Abstract
Evapotranspiration for 11 irrigated crops sown in Nov. and sorghum and pearl millet sown in Jan. was estimated by a gravimetric method of 9 stages of plant growth at 15-day intervals from 0 to 125 days in 1969-75. Pan evaporation data were available from a nearby observatory. Crop coefficient factors (K) were calculated for each plant stage (for wheat, maize, sorghum and pearl millet) according to the Blaney Criddle formula. Season-long values of K for the 4 crops were 0.62, 0.62, 0.68 and 0.74, resp. and the corresponding evapotranspiration:evaporation (Et:Eo) values were 0.72, 0.71, 0.56 and 0.57. The highest values of K, which occurred after 45-75 days of plant growth, were 0.79, 0.92, 0.81 and 0.93, and were associated with Et:Eo values of 0.81, 0.89, 0.72 and 0.73. In general, short-duration crops showed early peaks in the ratio Et:Eo
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Agronomy, A.P. Agricultural University, Hyderabad, A.P. India |
| Subjects: | Atmosperic Science > Climatology Atmosperic Science > Meterology |
| Divisions: | Maize Millet Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 10 Oct 2012 09:22 |
| Last Modified: | 10 Oct 2012 09:22 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/8364 |
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