Mean biomass yields for four switchgrass populations based on half-sib progeny performance at the East Tennessee Research and Education Center, Holston Unit, Knoxville, TN, under 1-cut (2010 to 2011) and 2-cut (2012 to 2013)†.

Table 1: Mean biomass yields for four switchgrass populations based on half-sib progeny performance at the East Tennessee Research and Education Center, Holston Unit, Knoxville, TN, under 1-cut (2010 to 2011) and 2-cut (2012 to 2013)^†.

Population source	1-cut system			2-cut system (seasonal biomass yield)			2-cut system (fall only biomass yield)
Population source	2010	2011	Mean	2012	2013	Mean	2012	2013	Mean
	-------------------------------------Biomass yield kg plant^-1-----------------------------------
ARK	0.56 b	1.52 b	1.04 b	1.89 a	1.39 a	1.64 a	0.87 a	0.28 a	0.58 a
OKN	0.96 a	2.09 a	1.52 a	1.96 a	1.44 a	1.70 a	0.86 a	0.26 a	0.56 a
OKS	0.95 a	2.05 a	1.50 a	2.01 a	1.47 a	1.74 a	0.92 a	0.30 a	0.61 a
TX	1.00 a	2.17 a	1.58 a	2.01 a	1.48 a	1.75 a	0.95 a	0.32 a	0.63 a
Mean	0.87	1.97	1.41	1.97	1.44	1.70	0.90	0.29	0.60
LSD	0.10^**	0.21^**	0.11^**	0.17	0.15	0.11	0.13 ns	0.05 ns	0.07 ns

^**Significant at the 0.01 probability level; ns: Not significant; †Values followed by a common letter within a column are not different at 0.05 probability level.