Tillage Effects on Spatiotemporal Variability of Particulate Organic Matter

Table 7

Standardized partial regression coefficients relating soil physical properties to particulate organic matter (POM)-C and -N fractions. Numbers in the columns labeled 98%CI are the half-width of the confidence intervals.

Fraction	Time	Sand	98%CI	Clay	98%CI	Bulk density	98%CI
POM-C
>1000 𝜇m	August 03			0.03	0.339	−0.10	0.221
	April 04			−0.23	0.355	−0.48	0.504
	October 04			0.37	0.343	−0.53	0.497
	June 05			0.13	0.354	−0.69	0.473
	All	0.27	0.237
250–1000 𝜇m	August 03			−0.24	0.321	−0.19	0.196
	April 04			−0.45	0.334	−0.87	0.447
	October 04			0.08	0.324	−0.36	0.441
	June 05			−0.16	0.334	−0.76	0.419
	All	−0.01	0.247
53–250 𝜇m	August 03			−0.48	0.351	−0.24	0.188
	April 04			−0.62	0.362	−0.66	0.431
	October 04			−0.39	0.353	−0.20	0.425
	June 05			−0.55	0.362	−0.64	0.402
	All	−0.47	0.297
POM-N
>1000 𝜇m	All	0.22	0.246	−0.16	0.244	−0.12	0.504
250–1000 𝜇m	All	0.02	0.23	−0.21	0.228	−0.25	0.272
53–250 𝜇m	All	−0.21	0.261	−0.30	0.263	−0.16	0.150