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K. SATHISH BABU, P.V. RAMESH BABU, M. SRINIVASA REDDY* AND P. KAVITHA
Department of Agronomy, Agricultural College, Mahanandi.
A field trial was conducted at Agricultural College Farm, Mahanandi on sandy loam soils to know the response of maize to
higher levels of NPK and Zn nutrition on growth, economics, yield and yield parameters. The experiment was laid out in randomized
block design with 10 treatments consisting of three higher levels of major nutrients and six treatments of higher levels of major
nutrients in combination of Zinc and each treatment was replicated thrice. Result showed that application of 350-100-100 kg NP2O5-K2O ha-1 along with foliar application of 0.2% ZnSO4 at 15 and 25 DAS (T10) resulted in higher plant height, total drymatter
accumulation. minimum days to 50 percent tasseling and silking, maximum grain yield and stover yeild. However harvest index
(43.85) was significantly higher with the application of 350-100-100 kg N-P2O5-K2O ha-1 along with foliar application of 0.2%
ZnSO4 at 15 DAS (T7). Higher gross returns (` 113537.67 ha-1) and net returns (` 74114.67 ha-1) were recorded with the application
of 350-100-100 kg N-P2O5-K2O ha-1 along with foliar application of 0.2% ZnSO4 at 15 and 25 DAS (T10). The highest B: C ratio
was obtained with application of 250-60-60 kg N-P2O5-K2O ha-1 along with foliar application of 0.2% ZnSO4 twice at 15 and
25 DAS (T8).
Growth, economics, maize, nutrients and yield.