Effect of nitrogen levels and row spacing on yield, CCS and nitrogen uptake in different sugarcane varieties

A field experiment was conducted at the Sugarcane Breeding Institute, Coimbatore to study the effect of graded levels of N application (0, 100, 200, 300 and 400 kg ha-1) under two different row spacings (75 and 90 cm) and in three promising sugarcane varieties (Co 86027, Co 86032 and Co 86038) on the nitrogen uptake, cane yield and sugar recovery percent in a sandy loam soil. Though the uptake of nitrogen increased with increased nitrogen application, cane yield did not show any significant increase with N applications above 100 kg ha-1. Row spacing did not influence cane yield and CCS%, but closer spacing led to an increased nitrogen uptake.