Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
N 1 : 240 kg ha -1 15.3 15.3 4326 4376
SEm± CD SEm± CD SEm± CD SEm± CD
M 0.43 1.53 0.54 1.91 128 453 141 498
N 0.12 0.37 0.21 0.63 34 102 40 122
Mat N 0.48 NS 0.64 NS 140 482 155 536
N at M 0.75 NS 0.94 NS 223 234 244 278
(CD at P=0.05)
Among the nitrogen levels, monetary returns were higher with 240 kg N ha -1 . The interaction
between the irrigation schedules and nitrogen levels indicated that higher yield and monetary
returns were observed with scheduling irrigation either by weekly check basin method or by
drip irrigation at 0.9 IW/CPE ratio along with 240 kg N ha -1 , but the water use efficiency was
found to be non-significant. The highest water use efficiency yield, monetary returns under
higher irrigation regimes of 0.9 IW/CPE ratio through drip and weekly irrigations using check
basin method along with higher nitrogen doses might be due to increased kernel yields under
favourable moisture conditions coupled with ample supply of nitrogen. Similar evidences were
reported by Krishnasamy et al., (2012).
Economics of maize as influenced by drip irrigation schedules and nitrogen levels
Treatment
Gross returns (Rs. ha -1 ) Net returns (Rs. ha -1 )
Returns per rupee invested
(Rs. ha -1 )
2013-14 2014-15 2013-14 2014-15 2013-14 2014-15
Irrigation schedules
M 1 : 0.7
IW/CPE
under drip
irrigation 68993 72176 20922 24105 1.43 1.50
M 2 : 0.8
IW/CPE
under drip
irrigation 90033 91718 41301 42986 1.85 1.88
M 3 : 0.9
IW/CPE
under drip
irrigation 104311 104298 54919 54906 2.11 2.11
M 4 :
Weekly
check
basin 105717 108164 52863 54308 2.00 2.01
N 1 : 160 kg
ha -1
N 1 : 200 kg
ha -1
N 1 : 240 kg
ha -1
Nitrogen levels
79332 82119 30065 32601 1.61 1.65
97151 97986 47388 47973 1.95 1.95
100307 102162 50050 51654 1.99 2.02
78 | Page Resilience through land and water management interventions, water management and governance