TABLE 5.

ANOVA analysis for potential nitrification activity data^a

Effect	Num DF	Den DF	F value	Pb
T	1	18	99.34	<.0001
SM	2	18	97.40	<.0001
F	2	18	0.42	0.6655
T × SM	2	18	12.15	0.0005
T × F	2	18	9.42	0.0016
SM × F	4	18	8.72	0.0004
T × SM × F	4	18	0.86	0.5092

^aNum DF, numerator degrees of freedom; Den DF, denominator degrees of freedom; T, temperature; SM, soil moisture; F, fertilizer treatment.

^bSignificant effects (P value < 0.05) are in bold.