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100 | _aRajasekharan,P .,Nair,K,M. et. al | ||
245 | _aSoil Fertility Assessment and Information Management for Enhancing Crop Productivity in Kerala | ||
260 |
_aThiruvananthapuram _bKerala State Planning Boar _c2013 |
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_2ddc _cBK _k631.8RAJ |
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