Suppression of Bromus tectorum L. by Established Perennial Grasses: Potential Mechanisms

Table 6: Selected soil nutrient measurements following the 5th harvest.


Depth (cm)	B. tectorum without competition	B. tectorum in competition	Perennial grasses	ANOVA

	Mineral nitrogen (mmol kg⁻¹)			Plant
0–30	0.97^AB	0.90^AB	0.27^B	Depth
30–60	0.90^AB	1.31^A	1.33^A	Inter.

	Mole % in mineral nitrogen pool			Plant
0–30	34^B	59^A	65^A	Depth
30–60	16^B	23^B	18^B	Inter.

	Soil solution phosphorus (mol L⁻¹)			Plant
0–30	9.2	9.3	7.7	Depth
30–60	3.7	4.2	3.8	Inter.