تحميل...
Adaptability constraints of a technically and economically feasible subsurface drainage system in the low-lying acid sulphate soils of Kerala, India
This paper discusses the introduction of subsurface drainage as a tool to improve rice production in low land areas of acid sulphate soils. Pipe drains with 15 and 30 m spacing were installed in farmers' fields in coastal lowlands of Kerala, India, at Kuttanad. Soil conditions improved within 2...
| المؤلف الرئيسي: | |
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| التنسيق: | Printed Book |
| منشور في: |
Irrigation and Drainage Systems 18: 329-346, 2004.
2004
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| الموضوعات: | |
| الوصول للمادة أونلاين: | http://10.26.1.76/ks/00898.pdf |
| الملخص: | This paper discusses the introduction of subsurface drainage as a tool to improve rice production in low land areas of acid sulphate soils. Pipe drains with 15 and 30 m spacing were installed in farmers' fields in coastal lowlands of Kerala, India, at Kuttanad. Soil conditions improved within 2 years after the introduction of the subsurface drainage and significantly improved the crop yield. Data collected over a period of 14 years, showed a yield increase of 1.1 t/ha (43) compared to non-drained areas. An economic analysis indicated that subsurface drainage is feasible with a benefit-cost ratio of 2.45, an internal rate of return of 47 and a net present value of Rs 5.17 million. The poor financial status of the farmers, however, is the main constraint for the large-scale adoption of the comparatively capital-intensive subsurface drainage systems in the acid sulphate soils of Kerala. |
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