Decomposition of the effects of small-scale irrigation systems on outputs of selected lowland and upland rice in the Philippines
2015
Carambas, N.DM. | Quilloy, A.J.A. | Rapera, C.L. | Ella, V.B.
In order to better harness the potentials of small-scale irrigation systems, this paper identifies the sources of improvements in rice outputs of lowland and upland ecosystems. Analysis of cross-section data sets for dry season production from 60 lowland rice farms in Laguna in 2010, and 60 upland rice farms in Ilocos Norte in 2012 with the use of stochastic frontier production function approach showed that using small-scale irrigation systems such as shallow tubewells and small water impoundment project improves yields of rice farms. The use of small-scale irrigation systems can increase rice productivity through technical change and improvement in technical efficiency. Shallow tubewells were found to be effective in increasing lowland rice productivity because it can shift the production function upward. Meanwhile, productivity improvement in upland farms using small water impoundment projects were largely due to higher technical efficiency attained by these farms.
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