GROWTH, YIELD AND WATER USE OF MAIZE AS INFLUENCED BY DRIP IRRIGATION SCHEDULES AND NITROGEN LEVELS
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Authors
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Y. DEEPTHI KIRAN*, V. SUMATHI and G. PRABHAKARA REDDY
Department of Agronomy, S.V.Agricultural College, Acharya N.G. RangaAgricultural University, Tirupati-517 502
Keywords:
Maize, drip irrigation, nitrogen levelsAbstract
The field experiment was conducted for two consecutive years (2013-14 and 2014-15) to evaluate the
yield and economic returns from maize under different irrigation schedules and nitrogen levels. The experiment
was laid out in split-plot design and replicated thrice by applying four irrigation schedules under the mainplot
and three nitrogen levels under subplot. The growth parameters and yield of maize were found superior with
weekly check basin irrigation, however, were on par with drip irrigation at 0.9 IW/CPE ratio. Among the nitrogen
levels tried, 240 kg N ha-1 recorded higher growth and yield. The interaction between the irrigation schedules
and nitrogen levels indicated the better growth parameters and higher yield with irrigation scheduled either by
weekly check basin method or through drip irrigation at 0.9 IW/CPE ratio along with 240 kg N ha-1. The water
use efficiency was also higher with drip irrigation scheduled at 0.9 IW/CPE ratio. The results revealed that
maize crop can be grown economically with the irrigations scheduledat 0.9 IW/CPE ratio through drip irrigation
along with 240 kg N ha-1.
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