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 |
Field experiment was conducted at Agricultural Research Station, Gangavathi, Karnataka during the rainy season of 2014, 2015 and 2016 to evaluate “Nutrient expert” a decision supporting tool against farmers and recommended fertilizer practice to optimize fertilizer recommendations for transplanted rice. The treatments consisted of various fertilizer practices including recommended fertilizer practice compared with site specific nutrient management and leaf colour chart based N management. The results revealed that farmers practice with high fertilizer dose of 330:158:100 kg N, P2O5 & K2O/ha recorded significantly higher mean grain yield of 69.91q/ha as compared to Nutrient expert based application of 125:37:57 kg N, P2O5 & K2O/ha with a mean grain yield of 58.73q/ha. However Nutrient expert based NPK compares well with recommended fertilizer practice (62.0q/ha) and remained on par with it in all the years as well as in the mean yields. Nutrient expert based NPK resulted in 37, 63 and 43% saving in N, P and K against recommended practice. The economics revealed that net returns in nutrient expert based NPK remained on par with farmers fertilizer practice in two out of three years and in all the years with recommended practice indicating the economic profitability of the use of nutrient expert decision supporting tool in rice.
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