Table 4.

Three-way ANOVA of the effects of seed position (P), duration (D), amount of litter (L), and their interaction on seed viability of Lespedeza davurica in the field.

Source of variation	df	Mean square	F	P
Position (P)	1	0.010	0.237	0.627
Duration (D)	2	14.817	349.016	<0.001
Litter amount (L)	3	0.255	6.010	0.001
P × D	2	0.214	5.029	0.008
P × L	3	0.207	4.867	0.003
D × L	6	0.117	2.754	0.016
P × D × L	6	0.044	1.027	0.413