Switchgrass Cultivar/Ecotype Selection and Management for Biofuels in the Upper Southeast USA

Table 3

Statistical significance of fixed and random effects on biomass yield for four switchgrass cultivars and two cutting managements across eight locations in 2001 and 2002 in the upper southeast USA.

Source of variation	df	Mean square	Significant of 𝐹 ratio
Year (Yr)	1	13.3	NS
Location (Loc)	7	434.3	*
Yr*Loc	7	123.6	*
Management (Mgt)	1	363.1	*
Yr*Mgt	1	150.1	*
Loc*Mgt	7	77.6	*
Yr*Loc*Mgt	7	29.5	*
Cultivar (Cv)	3	387.6	*
Yr*Cv	3	5.1	NS
Loc*Cv	21	25.6	*
Yr*Loc*Cv	21	11.9	*
Mgt*Cv	3	143.7	*
Yr*Mgt*Cv	3	5.6	NS
Loc*Mgt*Cv	21	11.7	*
Yr*Loc*Mgt*Cv	21	9.7	*

NS: not significant.
*Significant at the 0.05 level.