Vol. 10, Special Issue 8 (2021)

Author(s):
A Sireesha, Ch. S Ramalakshmi, T Sreelatha and T Usharani

Abstract:
A survey was conducted in major sugarcane growing mandals of Visakhapatnam district and collected soil, plant samples along with the data on sugarcane yield during formative to grand growth stage of the crop. The leaf samples were analysed for all macro, secondary and micronutrients content and nutrient ratios were developed. The leaf samples analysed were classified into two categories viz., low yielding (less than 70 t ha^-1) and high yielding (more than 70 t ha^-1). Computation of nutrient ratios for sugarcane at its formative to grand growth stage implied that the mean N/P, N/K, K/P and K/N ratios 9.65, 1.21,0.78 and 7.20 respectively in the third leaf of sugarcane in the high yielding zone resulted in maximum cane yields compared to relatively higher ratios in the leaves from low sugarcane yielding zones (N/P, N/K, K/P and K/N ratios 11.02,1.25,0.85 and 9.16 respectively) which indicates that low nutrient concentrations in low yielding zone resulting in low productivity of sugarcane.