In present study a reliable data bank of nutrient concentration versus fruit yield was established from survey of litchi orchards grown in lower Himalayas (Uttarakhand, India). By using mean and standard deviation, five foliar diagnostic norms were derived as deficient, low, optimum, high and excess for each nutrient of both fruiting terminals (FT) and non-fruiting terminals (NFT) based on the principle of diagnosis and recommendation integrated system (DRIS). | Foliar diagnostic norms for litchi (Litchi chinensis Sonn) in lower himalayas
