S3 ENHANCING CROP PRODUCTIVITY AND WATER USE EFFICIENCY IN CHAMBAL COMMAND AREA OF RAJASTHAN
PRATAP SINGH, R.S.NAROLIA, I.N. MATHUR, N.N.SHARMA,S.S.TOMAR & P.K.GUPTA
ALL INDIA COORDINATED RESEARCH PROJECT ON WATER MANAGEMENT Agricultural Research Station, Kota (Maharana Pratap University of Agriculture & Technology, Udaipur) KOTA - 324 001 ( RAJASTHAN ), INDIA
Chambal Command Area Total 4.85 lakh ha.
Particulars
RMC
LMC
Cultivable command area (CCA), lac ha
1.27
1.02
Discharge at head gate, Cumec
190
42.7
Length of main and branch canal, km Main
124
2.74
Lined
10
2
1376
1248
12
2
Branch No. of distributaries
Availability, requirement and deficit of water at field level, Manasgaon distributary Year
2007-08
2008-09
2009-10
2010-11
Crop season
Available water (ha cm)
Rain (ha cm)
Requirement (ha cm)
Deficit / Surplus in water supply (ha cm)
Rabi
31438
4405
50557
- 14715
Kharif
19711
44919
65545
- 915
Rabi
38847
2642
48509
- 7020
Kharif
4027
49543
52492
- 1079
Rabi
22971
-
29250
-6279
Kharif
0
38640
41204
-2564
Rabi
25835
-
32966
-7131
Kharif
4117
47680
46362
5435
Technology back up to enhance WP & WUE
Drip irrigation, 75 per cent of PE (every third day) and application of 100 per cent recommended Nitrogen (150 kg/ha) though fertigation, produced higher tuber yield (282q/ha) and saved 37 per cent irrigation water
HI 8498 under irrigation at 40 % depletion of ASM
New schedules for irrigation of wheat crop IRRIGATION
First
Second
Third
Fourth
EXISTING
20-25
50-60
75-80
95-100
PROPOSED
25-30
55-65
75-80
90-100
Under Furrow Irrigated Raised Bed system, wheat grown on raised bed (3 rows per bed) and Lucern in furrows, irrigated at IW/CPE =1.2 produced higher equivalent yield of wheat
Under drip and micro sprinkler in Garlic crop, irrigation scheduled every third day at 100 % PE + 75 % recommended dose of nitrogen through fertigation in eight equal intervals produced maximum garlic yield
Mini sprinkler irrigation in wheat crop at IW/CPE = 1.0 with 25 percent of recommended dose (120 kg/ha) of Nitrogen as basal and remaining 75 percent in equal splits with irrigation as fertigation produced maximum grain yield (56.9 q/ha).
Effect of irrigation schedule and land configuration on productivity of soybean (201011) Seed yield (q/ha) Pooled
WEE (kg/hacm)
One irrigation at flowering
17.40
35.60
Two irrigation at flowering & pod development
22.17
40.51
Rainfed
15.18
Treatment
B:C ratio
EWU Index (Rs/ha/cm)
2.70
95.8
3.02
122.2
32.74
2.76
83.9
A. Irrigation schedule
CD at 5%
1.27
B. Land configurations Broad bed furrow 3 rows
20.76
41.73
3.38
114.6
Broad bed furrow 4 rows
19.30
38.70
3.01
106.0
Dead furrow after two rows
18.09
36.26
2.97
99.7
Dead furrow after three rows
16.89
33.82
2.81
93.0
Flat bed sowing
16.20
32.37
2.38
89.2
CD at 5%
0.96
Major Challenges and Problems to Improve WUE In Chambal Command Area • Repair and maintenance of canal network, desilting of minor and water courses. • Availability of irrigation water for head farmers and non availability to tail enders. • Lack of Warabandi system in the chambal command • Less adoption of new irrigation technologies due to enough availability of canal water • Few administrative powers to water user associations. • Poor rainwater harvesting systems • Limited technology regarding flow, frequency & fertigation etc. under modern pressurized irrigation systems