Table 6.

Analysis of variance for response surface quadratic model of soluble phosphate and IAA.

Source	Sum of Squares	Df	Mean Square	F-value	p-value
(A) Soluble phosphate
Model	60323.45	14	4308.82	32.12	<0.0001
A-Temperature	4198.41	1	4198.41	31.29	<0.0001
B-Inoculum time	1376.07	1	1376.07	10.26	0.0059
C-pH	5897.88	1	5897.88	43.96	<0.0001
D- Inoculum size	1996.73	1	1996.73	14.88	0.0015
AB	245.16	1	245.16	1.83	0.1965
AC	8435.96	1	8435.96	62.88	<0.0001
AD	718.64	1	718.64	5.36	0.0352
BC	234.47	1	234.47	1.75	0.2060
BD	31.16	1	31.16	0.2323	0.6368
CD	15.82	1	15.82	0.1179	0.7361
A2	262.58	1	262.58	1.96	0.1821
B2	23135.59	1	23135.59	172.45	<0.0001
C2	5539.71	1	5539.71	41.29	<0.0001
D2	16785.17	1	16785.17	125.11	<0.0001
Residual	2012.40	15	134.16
Lack of Fit	1535.05	10	153.51	1.61	0.3130
Pure Error	477.35	5	95.47
Cor Total	62335.85	29
(B) IAA
Model	4173.62	14	298.12	35.31	<0.0001
A-Temperature	260.77	1	260.77	30.88	<0.0001
B-Inoculum time	46.96	1	46.96	5.56	0.0324
C-pH	41.27	1	41.27	4.89	0.0430
D- Inoculum size	42.37	1	42.37	5.02	0.0406
AB	23.26	1	23.26	2.75	0.1177
AC	114.86	1	114.86	13.60	0.0022
AD	65.00	1	65.00	7.70	0.0142
BC	85.24	1	85.24	10.10	0.0062
BD	90.49	1	90.49	10.72	0.0051
CD	1.64	1	1.64	0.1948	0.6652
A2	1156.37	1	1156.37	136.96	<0.0001
B2	1270.36	1	1270.36	150.46	<0.0001
C2	1350.93	1	1350.93	160.00	<0.0001
D2	1075.90	1	1075.90	127.43	<0.0001
Residual	126.65	15	8.44
Lack of Fit	113.51	10	11.35	4.32	0.0599
Pure Error	13.13	5	2.63
Cor Total	4300.27	29