Mean ethanol yields (mL plant-1) for four switchgrass populations based on half-sib progeny performance at the Knoxville, TN, under 1-cut (2010 to 2011) and 2-cut (2012 to 2013) system†.

Table 6: Mean ethanol yields (mL plant-1) for four switchgrass populations based on half-sib progeny performance at the Knoxville, TN, under 1-cut (2010 to 2011) and 2-cut (2012 to 2013) system^†.

Population	Mean ethanol yield (mL plant^-1)
	---------One-cut system--------			--------Two-cut system----------
	2010	2011	Mean	2012	2013	Mean
ARK	145 b	406 b	275 b	241 a	68 a	144 a
OKN	247 a	542 a	395 a	235 a	63 a	147 a
OKS	244 a	522 a	383 a	250 a	70 a	154 a
TX	251 a	552 a	402 a	256 a	71 a	157 a
Mean	222 b	505 a	364 a	246 b	68 c	150 b

^†Values followed by a common letter within a column are not significantly different as indicated by LSD mean separation at p = 0.05; Population source: ARK = Arkansas; OKN = NSL; OKS = Cimarron; TX = Texas (PI).