Table 4-b. East Tennessee (Knoxville) Yield and Feed Quality Characteristics

Table 4-b. By location mean dry weight yield and feed quality characteristics of eight corn hybrids evaluated for silage in small plot replicated trials at the East Tennessee AgResearch and Education Center in Knoxville, Tennessee during 2020. Analysis included hybrid performance across a 1 yr (2020), 2 yr (2019-2020) and 3 yr (2018-2020) period.

Hybrid	Herb. Pkg.†	Insect Pkg.†		Avg. Yield Dry Weight (tons/acre)						Crude Protein¶ (% dm)						Neutral Detergent Fiber¶ (% dm)						30 hr In Vitro Neutral Detergent Fiber Digestibility¶ (% of NDF)
				1 yr‡		2 yr		3 yr		1 yr		2 yr		3 yr		1 yr		2 yr		3 yr		1 yr		2 yr		3 yr
Hybrid	Herbicide Pkg.‡	Insect Pkg.‡		Dry Weight Avg. Yield (tons/acre)	MS Dry Weight Avg. Yield	Dry Weight Avg. Yield (tons/acre)	MS Dry Weight Avg. Yield	Dry Weight Avg. Yield (tons/acre)	MS Dry Weight Avg. Yield	Crude Protein (% dm)	MS Crude Protein	Crude Protein (% dm)	MS Crude Protein	Crude Protein (% dm)	MS Crude Protein	NDF (% dm)	MS NDF	NDF (% dm)	MS NDF	NDF (% dm)	MS NDF	30h IV NDFD (% of NDF)	MS 30h IV NDFD	30h IV NDFD (% of NDF)	MS 30h IV NDFD	30h IV NDFD (% of NDF)	MS 30h IV NDFD
			CS19005	7.9	A					6.5	A					40.3	BCD					49.8	A
Dyna-Gro D55VC80	RR	V2TP	CS17001	7.4	A					7.0	A					38.7	D					49.9	A
Croplan CP5678	RR	VT2P	CS16001	8.1	A	8.8	A	8.9	A	7.1	A	7.3	A	6.7	A	43.4	BC	43.7	A	42.0	A	50.2	A	52.0	A	49.6	A
Croplan CP5900S***	RR	VT2P	CS20002	7.9	A					6.4	A					48.1	A					45.0	B
DeKalb DKC 70-64	RR	VT2P	CS20003	7.3	A					6.3	A					39.3	CD					50.4	A
DeKalb DKC 64-44	RR,LL	SSX	CS19007	7.4	A					6.7	A					43.3	BC					49.4	A
Dyna-Gro D57VC17	RR	V2TP	CS18005	7.1	A	7.9	A	8.0	A	6.6	A	6.5	B	6.3	A	43.8	B	44.8	A	45.4	A	49.8	A	52.6	A	49.7	A
Croplan CP5700S***	RR	VT2P	CS20001	7.1	A					6.7	A					39.2	D					47.4	AB
Average				7.5		8.4		8.5		6.7		6.9		6.5		42.0		44.3		43.7		49.0		52.3		49.7
Standard Error				0.5		0.8		0.5		0.3		0.2		0.4		1.3		1.1		1.6		1.0		2.3		3.0
L.S.D..05				N.S.		N.S.		N.S.		N.S.		0.6		N.S.		4.0		N.S.		N.S.		3.0		N.S.		N.S.
C.V.				12		11		10		6		6		7		5		3		11		3		2		4
Plots per entry (reps x locs.)				12		24		36		12		24		36		12		24		36		12		24		36

Table 4-b, cont.

Hybrid	Herb. Pkg.†	Insect Pkg.†		Starch¶ (% dm)						Acid Detergent Fiber¶ (% dm)						Total Digestable Nutrients¶ (% dm)						Net Energy for Lactation¶ (Mcals/lb)
				1 yr		2 yr		3 yr		1 yr		2 yr		3 yr		1 yr		2 yr		3 yr		1 yr		2 yr		3 yr
Hybrid	Herbicide Pkg.‡	Insect Pkg.‡		Starch (% dm)	MS Starch	Starch (% dm)	MS Starch	Starch (% dm)	MS Starch	ADF (% dm)	MS ADF	ADF (% dm)	MS ADF	ADF (% dm)	MS ADF	TDN (% dm)	MS TDN	TDN (% dm)	MS TDN	TDN (% dm)	MS TDN	NEL (Mcals/lb)	MS NEL	NEL (Mcals/lb)	MS NEL	NEL (Mcals/lb)	MS NEL
#N/A	#N/A	#N/A	CS19005	38.9	AB					20.0	BCDE					73.7	AB					0.73	ABC
Dyna-Gro D55VC80	RR	V2TP	CS17001	40.1	A					18.7	E					74.5	AB					0.74	ABC
Croplan CP5678	RR	VT2P	CS16001	33.9	C	30.9	A	33.3	A	22.3	BC	23.5	A	22.8	A	73.3	AB	71.6	A	70.0	A	0.73	BC	0.71	A	0.69	A
Croplan CP5900S***	RR	VT2P	CS20002	29.0	D					25.2	A					68.9	C					0.69	D
DeKalb DKC 70-64	RR	VT2P	CS20003	39.3	AB					19.4	CDE					75.1	A					0.75	AB
DeKalb DKC 64-44	RR,LL	SSX	CS19007	35.3	BC					21.9	BCD					72.7	B					0.72	C
Dyna-Gro D57VC17	RR	V2TP	CS18005	32.3	CD	29.1	B	27.9	A	22.6	AB	24.1	A	25.1	A	73.1	AB	70.5	A	68.3	A	0.73	BC	0.70	A	0.67	B
Croplan CP5700S***	RR	VT2P	CS20001	40.2	A					19.2	DE					74.8	AB					0.75	A
Average				36.1		30.0		30.6		21.2		23.8		24.0		73.3		71.1		69.1		0.73		0.70		0.68
Standard Error				1.7		3.1		2.4		0.9		1.3		1.2		0.7		2.2		2.4		0.01		0.02		0.03
L.S.D..05				4.5		1.4		N.S.		2.8		N.S.		N.S.		2.1		N.S.		N.S.		0.02		N.S.		0.02
C.V.				7		3		19		8		4		13		2		1		2		2		2		2
Plots per entry (reps x locs.)				12		24		36		12		24		36		12		24		36		12		24		36

* Hybrids marked with an asterisk were in the top performing “A” group for yield across locations within two (**) or three (***) consecutive years of the previous three year evaluation period. † For a full description of abbreviated biotech traits, see table 10. ‡ Hybrids that have any MS letter in common, within a column, are not significantly different at the 5% level of probability using a least signficiant difference (LSD) mean separation test. ¶ Nutritive content values were calculated on a 100% dry matter (DM) basis.