Yield and Water Use Efficiency of Potato under Alternate Furrows and Deficit Irrigation

Table 3

Means for the main effects of methods and amount of irrigation water on the yield, yield attributes, and water use efficiency of potato.

Treatments	No. of tubers plant^−1	Total biomass yield (t ha^−1)	Tuber yield (t ha^−1)	WUE (kg m^−3)
Year
2013	7.4^b	31.85^b	27.84^b	141^b
2014	12.3^a	52.30^a	38.20^a	206^a
Significance	<0.0001	<0.0001	<0.0001	<0.0001
Irrigation methods
AFI	9.6^b	44.37^a	35.68^a	224^a
FFI	8.8^b	36.52^b	28.55^b	186^b
CFI	11.1^a	45.34^a	34.84^a	110^c
Significance	0.0075	0.0114	0.0392	<0.0001
Irrigation levels
50%	9.1	37.64^b	28.85^b	218^a
75%	10.3	43.67^ab	35.03^a	173^b
100%	10	44.93^a	35.18^a	130^c
Significance	0.187	0.058	0.059	<0.0001

Note: AFI, FFI, CFI, and WUE are alternate furrow irrigation, fixed furrow irrigation, conventional furrow irrigation, and water use efficiency, respectively.