Author(s): Suman Sarkar and Kaushik Chakraborty
Selection of proper dose of inorganic N fertilizer in relation to the growth stage of rice plant is given priority for effective field nutrient management. Farmers either follow typical leaf colour chart (LCC) or rely on conventional knowledge to apply N which often underscore the actual field nutrient necessity. The usual LCC, that are generally in practice, has only four green colour bands of different concentration and so does not represents the gradual change of leaf colour. Further reliance on farmer’s conventional knowledge may sometime have proven unscientific and less prudent. In this contemplation the present real time leaf colour chart (RTLCC) which have a wide colour range enable the farmer to determine the required N dose more accurately and scientifically for effective field management .