Myers, R.J.K. and Foale, M.A. and Done, A.A. (1984) Responses of grain sorghum to varying irrigation frequency in the Ord irrigation area. II. Evapotranspiration, water use efficiency and root distribution of different cultivars. Australian Journal of Agricultural Research, 35 (1). pp. 31-42.
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Abstract
4 grain sorghum cv. were grown during 1976 on cracking clay soil irrigated every 7, 14, 28 or 42 days or irrigated once only at sowing. Frequent irrigation resulted in shallow root development, with most water use from the surface 40 cm of soil. Depth of water extraction increased with plant age and with less frequent irrigation. The depth of root penetration determined by direct measurement was similar to that inferred from soil water profiles although water uptake/unit length of root was related to soil water content only in the 0-40 cm soil layers. Ea/Ep (actual evapotranspiration/pan evaporation) immediately after irrigation was c. 0.75 irrespective of cv., LAI or irrigation interval. At a later stage of soil drying Ea/Ep was linearly related to LAI for LAI less than 5. It was concluded that max. sorghum yields were attainable with irrigation at sowing followed by 3 carefully timed irrigations
| Item Type: | Article |
|---|---|
| Author Affiliation: | Division of tropical crops and pastures, CSIRO, St. Lucia, Qld. 4067, Australia |
| Subjects: | Plant Production |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 14 May 2012 06:06 |
| Last Modified: | 14 May 2012 06:06 |
| Official URL: | http://dx.doi.org/10.1071/AR9840031 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/5288 |
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