Table 1. P-values of the Wald F-statistics derived from linear mixed effects models for the main and interacting effects.

DAP	35–40	40–50	50–60	60–70
Treatment	RGR (kpixels day-1) Grass
C*N*P	0.443	0.783	0.517	<0.001
C*N	0.127	0.183	<0.001	nr
C*P	0.704	0.354	0.715	nr
N*P	0.163	0.063	0.46	nr
Cultivation	0.201	<0.001	nr	nr
Nitrogen	<0.001	<0.001	nr	nr
Phosphorus	0.666	0.257	0.074	nr
	RGR (day-1) Legume
C*N*P	0.658	0.931	0.042	0.024
C*N	0.092	0.185	nr	nr
C*P	0.558	0.043	nr	nr
N*P	0.847	0.678	nr	nr
Cultivation	0.168	nr	nr	nr
Nitrogen	<0.001	0.073	nr	nr
Phosphorus	0.656	nr	nr	nr

Cultivation (C), nitrogen (N) and phosphorus (P) on the half-pot level trait RGR in grass and legume. Growth intervals are indicated by DAP (days after planting). Significant effects are indicated at (α = 0.05). nr indicates ‘not reported’ (suppression due to interaction effects).