Table 2. Summary of the soil physical characteristics between sites in lowest (<20%, n = 11) and highest (>80%, n = 11) R. niveus categories.

Physical parameter	Mean value (ppm)		df	t-value	p-value
	>80%	<20%
Ca	1147.9	1019.3	10	1.03	0.325
C	170.3	154.3	10	0.87	0.402
K	1.1	1.8	10	−0.7	0.498
N total	966.1	649.3	10	1.15	0.275
NH4	247.6	152.4	10	0.75	0.466
NO3	4	1.8	10	2.37	0.039*
P	28.3	22.2	10	0.86	0.407
pH	6.5	6.9	10	−4.35	0.001*

*Denotes significance of differences between mean values.