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Irrigation has playecl a contributing role in enhancing agricultural production and productivity in Nepal. Farmer-Managed Irrigation Systems (FMIS) have bcen operating for rnore than 25years using local capacities. A survey was accomplished during April-May, 200S to evaluate the changes that have been brought about by the introduction ofFMIS at Kumrej in Chitwan district. The changes in crop species, cropping area, irrigated area, crop production, productivity and cropping intensity after the introduction ofFMIS were explored. Comparisons were made in between farmers participating and not participating in FMIS. There was a total increase ef abeut 47% in irrigated Iand sincc the introduction ef FMIS. This has helped increase crop production as crops can be growll more than once a year and as a result cropping intensity has been tremendously irnproved to more than 256 percent. Further, the cropping areas as well as the crop productivity have bcen greatly influence with the inception ofFMIS. Thc change in the erepping pattern from cash crop oriented te foed crop production to combat food insuraciency in Nepal. Considering the successes of FMIS, development of small-scale farmers rnanaged irrigation system to improve agricultural production in Nepal should be emphasized,

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