文章基本信息

标题：Economic gains of improving soil fertility and water holding capacity with clay application: the impact of soil remediation research in northeast Thailand
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作者：Saleth, Rathinasamy Maria ; Inocencio, Arlene ; Noble, Andrew D. 等
期刊名称：Journal of Food Distribution Research
印刷版ISSN：0047-245X
出版年度：2009
卷号：40
期号：SUPPL
出版社：Food Distribution Research Society
摘要：Declining productivity of agricultural soils in Northeast Thailand is a challenge facing land managers and farmers. A program was initiated in 2002 to investigate the potential role of incorporating clay-based materials into degraded soils as a means of enhancing productivity. This research report attempts to provide an ex-post assessment of the field level impact and economic viability of this approach, using the empirically derived estimates of the average income impacts that the application of bentonite or clay technology has generated among farm communities in Northeast Thailand. From an exclusive IWMI perspective, the impact evaluation suggests that the program has a net present value (NPV) of US$0.41 million with a benefit-cost ratio (BCR) of 2.44 for the sample, and a NPV of US$21 million with a BCR of 75 for the region.
关键词：Soil improvement;Impact assessment;Research projects;Soil fertility;Sandy soils;Water holding capacity;Clay soils;Soil water relations;Soil management;Farming systems;Crop yield;Vegetable crops;Rice;Sorghum;Models;Statistical methods;Cost benefit analysis;Economic analysis;Economic aspects;Thailand