Table 2.

N transformation rates by horizon, location, and N treatment.

Horizon	Location	N trt	Nitrification		Ammonification		N mineralization
			μg g-1 d-1	SD	μg g-1 d-1	SD	μg g-1 d-1	SD
Biocrust 0.5 cm	Canopy	Amb	2.299	1.700	-0.098	0.289	2.200	1.902
Biocrust 0.5 cm	Interspace	Amb	0.348	0.311	-0.124	0.055	0.224	0.295
Soil 10 cm	Canopy	Amb	0.712	0.575	-0.239	0.236	0.473	0.604
Soil 10 cm	Interspace	Amb	0.113	0.095	-0.095	0.115	0.018	0.141
Biocrust 0.5 cm	Canopy	N7	4.275	2.361	-0.251	0.758	4.025	2.626
Biocrust 0.5 cm	Interspace	N7	0.634	0.320	-0.272	0.132	0.362	0.348
Soil 10 cm	Canopy	N7	0.829	0.801	-0.404	0.436	0.424	1.004
Soil 10 cm	Interspace	N7	0.132	0.144	-0.151	0.122	-0.018	0.195
Biocrust 0.5 cm	Canopy	N15	3.115	1.629	-0.694	0.376	2.421	1.698
Biocrust 0.5 cm	Interspace	N15	0.832	0.569	-0.524	0.175	0.308	0.468
Soil 10 cm	Canopy	N15	1.323	1.694	-0.341	0.377	0.982	1.821
Soil 10 cm	Interspace	N15	0.191	1.252	-0.277	0.273	-0.468	1.373