The Effects of Some External Management Factors on the Nitrogen Composition of Cattle Manure on Smallholder Farms

Table 2

ANOVA results for NH₄-N concentration (mg NH₄-N/kg manure, DM basis) of manure in storage in the dry season experiment. Fixed effects are the manure quality (Medium versus Low quality), the presence or absence of urine in the manure, and the number of days the manure was incubated (0, 6, 12, 18, 24, 30, 50, 70, 90, or 120 days). Terms for the interaction between fixed effects are denoted by fixed effects terms separated by an asterisk (*). DF represents the degrees of freedom of the test.

Effect	P-value
	DF	NH4-N; (mg/kg manure)
Medium versus Low quality manure [A]	1	0.0147
Urine added versus no urine [B]	1	0.0079
Days in storage [C]	9	<0.0001
A*B	1	0.7994
A*C	8	0.5932
B*C	9	0.0199
A*B*C	8	0.0453