TABLE 6.

Linear regression parameters: E. coli O157:H7 strain B6914 concentrations in leachate over a 17-day period^a

Manure	Soil	Intact soil cores						Disturbed soil cores
		y intercept	Slopeb	r2c	x intercept	x intercept UCLd	x intercept LCLe	y intercept	Slopeb	r2c	x intercept	x intercept LCLd	x intercept LCLe
None	Clay loam	5.407	−0.193	0.890	28f	35	24	4.885	−0.147	0.882	33	40	28
	Silt loam	4.966	−0.151	0.894	33	40	28	4.982	−0.168	0.787	30	40	24
	Sandy loam	4.332	−0.115	0.796	38	51	31	5.168	−0.078	0.726	66	98	50
Fresh dairy manure solids	Clay loam	3.986	−1.010	0.751	4f	2	−24	4.364	−0.127	0.644	34	55	25
	Silt loam	5.683	−0.212	0.922	27	31	24	4.915	−0.150	0.927	33	38	29
	Sandy loam	5.018	−0.066	0.677	76	127	55	5.013	−0.106	0.763	47	66	37

^aSee Fig. 1 and 2. Leachate samples were collected from duplicate intact and disturbed soil cores after each rainfall event, a total of eight times. One-half of the cores were inoculated, and one-half of the cores were inoculated and amended with 50 g of manure tilled into the soil surface. 

^bSlope of a linear regression line through all data points extending to both axes. 

^cFit of the regression line to the data points, where 1.000 is a perfect fit. 

^dUCL, upper confidence interval. 

^eLCL, lower confidence interval. 

^fOne-half of the clay loam soil cores that did not receive manure and all of the clay loam soil cores that received manure became clogged after 3 days.