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U.VIJAYABHASKAR REDDY, G. PRABHAKARAREDDY, M. SRINIVASAREDDY,V. RAJARAJESWARIAND
P.KAVITHA
Dept. of Agronomy, S.V. Agricultural College, ANGRAU, Tirupati-517502, Chittoor (Dist.), Andhra Pradesh
A field experiment was conducted during two consecutive kharif seasons of 2014 and 2015 to evaluate the effect of different levels of nitrogen (200, 250 and 300 kg ha-1) and phosphorus (40, 60, and 80 kg ha-1) on the yield attributes and yield of maize. The higher values of yield attributes viz., cob length, number of grains cob-1 and hundred grain weight were recorded at N applied at 300 kg ha-1 and P at 60 kg ha-1 , which was however comparable with rest of the levels tried, except on number of grains cob-1 by N levels in the second year. Significant interaction was recorded on cob length among N and P levels with highest and lowest values by N3P2 (300 kg N + 60 kg P2O5 ha-1) and N1P3 (200 kg N + 80 kg P2O5 ha-1) respectively in the second year of study. During both the years, the highest and lowest grain yields were recorded with application of 300 kg ha-1 and 200 kg N ha-1 and with P @ 60 kg ha-1 and 40 kg ha-1 respectively. The combination of 250 kg N and 60 kg P2O5 ha-1 resulted in higher grain yield of maize during kharif season.
Maize, nitrogen, phosphorus, yield, yield attributes