Effect of NPK fertilizer on yield of tea

Abstract

An experiment was conducted to study the effect of various dosage of fertilizer on yield of mature tea and to determine the nutrient concentrations in tea soils and leaves under different dosage. The standard clone TV-1 was taken into consideration in three different agro-climatic zones of Assam. Total eight treatments were imposed in the trial along with normal fertilizer dose. Although T6 (50% excess of normal dose ie. 195 kg Nitrogen, 60 kg phosphate and 195 kg Potassium per hectare per year) give maximum yield, it is evident from plant nutrient analysis values that the above & higher dose of nutrient application tends to create micronutrient imbalance. Therefore it has been inferred that T5 (25 % excess of normal dose ie. 162.5 kg Nitrogen, 50 kg Phosphate and 162.5 kg Potash per Ha per year) has emerged as best treatment without adversely affecting the nutrient status of the soil. It was observed that soil N, P and K are positively correlated with leaf N, P and K respectively and also the yield of green leaf.