Hoffman, G.J. and Rawlins, S.L. and Oster, J.D. and et al, . (1979) Leaching requirements for salinity control I. Wheat, sorghum, and lettuce. Agricultural Water Management, 2 (3). pp. 177-192.
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Abstract
Crop productivity and water use efficiency when saline irrigation water is used are highest when efficient irrigation systems are managed to meet the crop's leaching requirement. The objective of this experiment was to establish the leaching requirements for frequently irrigated wheat, grain sorghum, and head lettuce. The 4-year study in field plots consisted of six replicated leaching fraction treatments. The plots were pulse-irrigated daily with water having a total dissolved salts concentration of 1350 mg/l. The leaching requirements are 0.08 for wheat and sorghum, and 0.26 for lettuce. The respective evapotranspiration during each crop's growing season coincident with the leaching requirements was 440, 550, and 245 mm. A pan factor of 0.7 was consistent among these three crops at their respective leaching requirements. With daily irrigation, 90% of the crop's water uptake occurred above a soil depth of 0.6 m, independent of leaching fraction.ADDITIONAL ABSTRACT:Crop productivity and water use efficiency when saline irrigation water is used are highest when efficient irrigation systems are managed to meet the crop's leaching requirement. The objective of this experiment was to establish the leaching requirements for frequently irrigated wheat and grain sorghum. The 4-yr study in field plots consisted of 6 replicated leaching fraction treatments. The plots were pulse-irrigated daily with water having a total dissolved salts conc. of 1350 mg/l. The leaching requirements were 0.08 for wheat and sorghum; the evapotranspiration during each crop's growing season coincident with the leaching requirements was 440 and 550 mm, resp. A pan factor of 0.7 was consistent among these crops at their respective leaching requirements. With daily irrigation, 90% of crop water uptake occurred above a soil depth of 0.6 m, independent of leaching fraction
| Item Type: | Article |
|---|---|
| Author Affiliation: | U.S. Salinity Laboratory, USDA, Riverside, California, USA |
| Subjects: | Plant Protection |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 28 Jan 2013 11:00 |
| Last Modified: | 28 Jan 2013 11:00 |
| Official URL: | http://dx.doi.org/10.1016/0378-3774(79)90001-5 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/9412 |
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