Swarup, A. and Singh, K.N. (1989) Effect of 12 years' rice/wheat cropping sequence and fertilizer use on soil properties and crop yields in a sodic soil. Field Crops Research , 21 (3-4). pp. 277-287.
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Abstract
In a field experiment initiated in 1974 on a sodic soil (pH 9.2 exchangeable sodium percentage 32), continuous cropping with rice and wheat grown in rotation for 12 years (1974 to 1986) reduced the available N, P and K from the initial levels of 225, 33.6 and 358 kg/ha to 120, 17.9 and 318 kg in plots without fertilizer (control). Continuous use of 120 kg N/ha alone or in combination with P and K significantly enhanced the yield of crops and available N. 22 kg P/ha applied to either or both rice and wheat in rotation significantly improved the yield of rice from 1979 onwards but that of wheat only during 1985-86, and led to a considerable build-up in available soil P. Where N alone was applied, available P and K declined from the initial level of 33.6 and 358 kg/ha to 8.7 and 280 kg. Application of 42 kg K/ha to either or both crops had no effect on yields. Application of N, P and K enhanced the concentration and uptake of these elements in the crops. Continuous cropping for 12 years reduced soil pH from 9.2 to 8.5 and ESP from 32 to 8.0, there being no differential effect due to treatments
| Item Type: | Article |
|---|---|
| Author Affiliation: | Central Soil Salinity Res. Inst., Karnal 132001, Haryana, India. |
| Subjects: | Plant Production > Production Practices Soil Science and Microbiology > Soil Sciences |
| Divisions: | Other Crops |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 31 Oct 2010 21:54 |
| Last Modified: | 31 Oct 2010 21:54 |
| Official URL: | http://dx.doi.org/10.1016/0378-4290(89)90009-9 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/391 |
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