Table 1. Analyses of the main and interactive effects of the three treatments on aggressivity and relative yields of Dactylis glomerata and Festuca rubra.

Treatment	Aggressivity		Relative yield
			Dactylis glomerata		Festuca rubra
	F-value	P-value	F-value	P-value	F-value	P-value
N			2.83	0.099
A	27.87	<0.0001	1.32	0.26	39.00	<0.0001
B	6.92	0.011	5.06	0.029
A × B	4.21	0.045	4.37	0.041

Notes.

N

Nitrogen

A

Aboveground herbivory

B

Belowground herbivory