Irrigation and Melioration


The study was carried out in 2013-2014 at two pilot farms of Fergana Valley cultivating grapevines using canal irrigation and groundwater, accordingly. The farm data on irrigation applications and energy inputs were compared with the experience of farmers of Turkey and Iran.The study indicated that at the farm using groundwater yield of grapes was 2.7 times and water productivity 3 times higheras compared to using canal irrigation. This was found to be the consequence of inadequate applications of organic fertilizers and farming machinery, and poor irrigation scheduling under gravity system. The farm using groundwater applied timely frequent short irrigations that ensured soil moisture content at the optimal level andimproved availability of nutrients for plants. There were additional electricity expenses of 14349 Mj/ha for groundwater pumping. Widening the access of farmers to advanced pumps can reduce these expenses by 25%. Using solar energy could be another alternative which is the subject for future research.


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