Table 3.

Response surface central composite design and experimental and predicted responses.

Variables					Response
					Penetrometer (kg/cm2)		Wind Erosion (g/m2 h)
Run	A	B	C	D	Experimental	Predicted	Experimental	Predicted
1	5	14	14	8.5	1.1	1.23	24.60	24.66
2	7	14	14	8.5	1.6	1.60	21.99	22.20
3	5	18	14	8.5	1.5	1.49	24.20	26.80
4	7	18	14	8.5	1.7	1.60	21.00	20.70
5	5	14	18	8.5	1.7	1.63	23.10	22.00
6	7	14	18	8.5	1.6	1.71	20.97	20.88
7	5	18	18	8.5	1.9	1.79	22.40	22.00
8	7	18	18	8.5	1.8	1.87	18.90	19.15
9	5	14	14	10.5	1.6	1.61	18.50	18.60
10	7	14	14	10.5	2.1	2.00	15.60	15.70
11	5	18	14	10.5	2	1.85	18.15	18.30
12	7	18	14	10.5	2.3	2.27	15.12	15.44
13	5	14	18	10.5	2	1.97	17.42	17.90
14	7	14	18	10.5	2.1	2.15	15.80	15.09
15	5	18	18	10.5	2.1	2.11	16.30	16.63
16	7	18	18	10.5	2.5	2.45	15.00	14.60
17	4	16	16	9.5	1.5	1.50	22.00	23.22
18	8	16	16	9.5	2	1.97	15.10	15.80
19	6	12	16	9.5	1.5	1.50	22.20	22.05
20	6	20	16	9.5	2	1.97	20.31	20.70
21	6	16	12	9.5	1.7	1.59	21.50	21.55
22	6	16	20	9.5	2.2	2.18	20.15	20.45
23	6	16	16	7.5	1.5	1.42	18.30	19.67
24	6	16	16	12.5	2.3	2.22	11.42	10.76
25	6	16	16	9.5	1.6	1.60	20.00	21.00
26	6	16	16	9.5	1.5	1.60	20.00	21.00
27	6	16	16	9.5	1.6	1.60	20.00	21.00
28	6	16	16	9.5	1.6	1.60	20.00	21.00
29	6	16	16	9.5	1.6	1.60	20.00	21.00
30	6	16	16	9.5	1.6	1.60	20.00	21.00