[Retracted] Application of Regression Analysis to Identify the Soil and Other Factors Affecting the Wheat Yield

Table 4

Regression analysis with and without outlier.

Term	Full data				After deleting outliers
	Beta	SE	T	value	Beta	SE	T	value
Constant	69.350	6.2800	11.04	0.0000	68.420	6.0800	11.26	0.0000
Saturation (%)	−0.154	0.0335	−4.59	0.0000	−0.145	0.0324	−4.46	0.0000
EC (dsm-1)	0.072	0.0297	2.44	0.0150	0.080	0.0288	2.76	0.0060
pH	2.345	0.4440	5.28	0.0000	2.340	0.4330	5.41	0.0000
Org. M. (%)	1.454	0.7920	1.83	0.0670	1.862	0.7730	2.41	0.0160
Phosphorus (ppm)	−0.263	0.0388	−6.78	0.0000	−0.285	0.0375	−7.6	0.0000
Potassium (ppm)	−0.010	0.0019	−5.18	0.0000	−0.008	0.0019	−4.33	0.0000
CC (%)	−0.494	0.0829	−5.96	0.0000	−0.558	0.0804	−6.93	0.0000
Zinc (ppm)	−4.740	0.5950	−7.97	0.0000	−4.892	0.5810	−8.43	0.0000
Copper (ppm)	−10.740	5.7700	−1.86	0.0630	−11.500	5.6600	−2.03	0.0430
Iron (ppm)	−0.337	0.1670	−2.02	0.0440	−0.357	0.1610	−2.22	0.0270
Manganese (ppm)	−2.137	0.7890	−2.71	0.0070	−1.936	0.7580	−2.55	0.0110
Boron (ppm)	−55.210	9.2800	−5.95	0.0000	−52.210	8.9500	−5.83	0.0000
Nitrophos	0.092	0.2110	0.44	0.6610	0.001	0.2020	0.01	0.9950
Nitrogen	0.140	0.1690	0.83	0.4070	0.069	0.1640	0.42	0.6730
DAP	−0.117	0.2430	−0.48	0.6310	−0.188	0.2360	−0.8	0.4250
Potash	−0.052	0.2360	−0.22	0.8270	0.036	0.2300	0.16	0.8750
Urea	0.298	0.1750	1.70	0.0900	0.525	0.1970	2.66	0.0080
Water frequency	−0.171	0.1680	−1.01	0.3110	−0.277	0.1630	−1.7	0.0900
Pesticide frequency	0.139	0.1360	1.02	0.3080	0.279	0.1430	1.96	0.0510
Last crop
Rice	0.785	0.2940	2.67	0.0080	0.713	0.2840	2.51	0.0120
Corn	0.299	0.3680	0.81	0.4170	0.493	0.3590	1.37	0.1700
Sugarcane	0.840	0.6280	1.34	0.1820	0.791	0.6010	1.32	0.1890
Empty	0.591	0.4760	1.24	0.2150	0.542	0.4560	1.19	0.2350
Seed chemical coating
No	−1.031	0.3700	−2.79	0.0050	−0.959	0.3580	−2.68	0.0080
Water type
Tube well	−0.172	0.6960	−0.25	0.8040	−0.054	0.6660	−0.08	0.9360
Both (tube well and canal water)	−0.350	0.7000	−0.50	0.6170	−0.229	0.6690	−0.34	0.7320
Way of cultivation
Water kashat method	0.009	0.2410	0.04	0.9700	0.003	0.2340	0.01	0.9900
Drilling method	0.369	0.3940	0.94	0.3490	0.308	0.3830	0.8	0.4230
Compost use
No	−1.218	0.2570	−4.74	0.0000	−1.167	0.2470	−4.72	0.0000
F ( value) = 17.75 (0.0000), S = 2.772, R^2 = 45.24%, R^2(adj) = 40%					F ( value) = 19.59 (0.0000), S = 2.649, R^2 = 48.38%, R^2 (adj) = 45.91%