National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Uneven distribution pattern of monsoon rain and highly permeable soil type and poor rainwater management practices effect the crop yield. Also lands remain barren in winter season due to lack of rainfall. A Dynamic Programing (DP) model is developed to allocate optimum supplemental irrigation to crop for receives maximum net annual return from the cropped area under land and water availability constraints in the OFR based rainfed agricultural system. This model requires soil data, crop data, meteorological data and different level of water management strategies as inputs. The model integrates the dynamics associated with the water released by supplemental irrigation from the OFR to the actual water utilized by the crops at farm level. It also takes into account the non-linear relationship of root growth, soil moisture dynamics for multiple crops and yield response to water deficit at various growth stages of the crops. Apply this model to 800 m2fields that the optimum size of the OFR varies with the combination of the crop (rice or rice - mustard) and the size of OFR reduces in 15% soil moisture depletion factor than 10% soil moisture depletion factor also the OFR size is less for rice than rice – mustard scenario. For 10% soil water depletion for rice (from saturation) and mustard (from field capacity) crops, the optimum size of OFR varied from 5.35% to 9.85%. Similarly, for 15% soil water depletion it varied from 5.05% to 9.35%.
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