Yield and Water Use Efficiency of Potato under Alternate Furrows and Deficit Irrigation
Table 5
Economic analysis based on mean values for potato production for the use of different irrigation methods and levels of irrigation water on potato production.
Treatments
Adjusted tuber yield (kg ha−1)
Gross field benefits (US$ ha−1)
Variable cost (US$ ha−1)
Net benefit (US$ ha−1)
Marginal rate of return
Irrigation method
Irrigation level (%)
AFI
50
28485
12947.73
68.18
12879.55
—
FFI
50
23886
10857.27
68.18
10789.09
D
AFI
75
34164
15529.09
102.27
15426.82
74.72
FFI
75
26451
12023.18
102.27
11920.91
D
AFI
100
33678
15308.18
136.36
15171.82
D
FFI
100
26748
12158.18
136.36
12021.82
D
CFI
50
25515
11597.73
136.36
11461.36
D
CFI
75
33975
15443.18
204.55
15238.64
D
CFI
100
34569
15713.18
272.73
15440.45
0.2
Note: D means dominated due the greater variable cost but lower net benefit.