Table 4.

Summary of analysis of variance for gas exchange and yield of the sour passion fruit plants as a function of irrigation depths (ID), pit volume (PV), and doses of water-retaining polymer (WRP).

SV	DF	Mean Squares
		A	Gs	Ci	E	WP	Yield
Blocks	2	2.86 ns	0.0011 **	2908.71 **	0.0001 ns	5.00 ns	194.40 **
Irrigation depths (ID)	1	180.26 *	0.0325 **	317.40	6.01 *	1.66 ns	1.61 ns
Error 1	2	1.86	0.0001	1.55	0.06	0.46	0.65
Pit volumes (PV)	1	1.86 ns	0.0001 ns	1643.26 *	2.81 *	0.60 ns	248.06 **
Water-retaining polymer (WRP)	4	12.73 **	0.0010 ns	605.94 ns	1.77 *	0.62 ns	107.80 **
ID × PV	1	0.06 ns	0.0010 ns	1401.66 *	0.01 ns	0.06 ns	345.60 **
ID × WRP	4	17.85 **	0.0063 **	504.60 ns	2.89 **	0.70 ns	38.85 **
PV × WRP	4	14.50 **	0.0005 ns	348.97 ns	0.27 ns	0.55 ns	59.44 **
ID × PV × WRP	4	2.15 ns	0.0015 **	255.54 ns	1.39 ns	1.77 *	68.39 **
Error 2	36	2.29	0.0003	290.52	0.45	0.58	2.39
Total	59
CV1		11.85	2.48	0.53	6.54	19.52	4.34
CV2		13.13	15.10	7.30	17.16	21.86	8.33
Mean		11.53	0.131	233.63	3.95	3.50	18.56

SV = sources variation; DF = degree of freedom; CV₁ = coefficient of variation of the main plot; A = net photosynthesis rates; gs = stomatal conductance; Ci = internal CO₂ concentration; E = leaf transpiration; WP = water productivity; CV₂ = coefficient of variation of the subplots; *, **, ^ns = significant at 0.05, 0.01 probability and not significant, respectively, according to the F test at 0.05 probability.