Table 16. Early Nov. Planted, Across Location, Biomass and Weed Suppression

Table 16. Across location mean biomass and weed suppression of 18 cover crop varieties and 8 mixes planted in early Nov. 2020, in small plot replicated trials, at two University of Tennessee AgResearch and Education Center locations, in Tennessee, and evaluated from Fall 2020 to Spring 2021.

Variety	Common Name	Group	Biomass (DM ton/ac)				Biomass (DM lb/ac)				Weed Proportion (%)
			Apr		May		Apr		May		Dec‡		Feb‡		Apr‡		May
Cereals
Bates RS4	Cereal Rye	Cereal	1.0	A	2.0	A	1956	A	3935	A	51	JK	10	I	5	F-H	3	C-E
Elbon	Cereal Rye	Cereal	0.7	C	2.1	A	1367	C	4236	A	53	JK	13	HI	3	GH	2	D-F
NF95319B	Cereal Rye	Cereal	0.9	AB	2.0	A	1832	AB	4069	A	45	K	11	I	3	GH	3	C-E
NF97325	Cereal Rye	Cereal	0.7	C	1.8	A-E	1401	C	3536	A-E	61	IJ	14	HI	6	E-H	4	CD
NF99362	Cereal Rye	Cereal	0.8	BC	1.9	AB	1599	BC	3800	AB	47	K	11	I	3	GH	3	CD
Yankee	Cereal Rye	Cereal	0.3	F-H	1.2	F-H	635	F-H	2464	F-H	48	K	18	G-I	12	DE	5	CD
TN1902	Wheat	Cereal	0.4	EF	1.4	D-G	891	EF	2877	D-G	68	HI	19	G-I	4	F-H	5	CD
Legumes
Paradana	Clover, Balansa	Legume	0.1	I	0.3	J	227	I	651	J	100	A	99	A	57	A	54	A
Taipan	Clover, Balansa	Legume	0.1	I	0.4	J	259	I	729	J	100	A	100	A	57	A	57	A
Viper	Clover, Balansa	Legume	0.1	I	0.5	IJ	191	I	1001	IJ	100	A	100	A	54	AB	56	A
Lightning	Clover, Berseem	Legume	0.1	I	0.4	J	214	I	740	J	100	A	99	A	48	B	33	A
Dixie	Clover, Crimson	Legume	0.2	I	0.9	HI	316	I	1730	HI	77	E-H	89	AB	15	CD	12	B
AU Merit	Vetch, Hairy	Legume	0.4	EF	1.1	F-H	734	EF	2289	F-H	85	C-F	76	BC	9	D-G	2	D-F
Patagonia	Vetch, Hairy	Legume	0.5	DE	1.2	F-H	998	DE	2472	F-H	87	B-E	59	DE	3	GH	0	F
WinterKing	Vetch, Hairy	Legume	0.4	E-G	1.3	FG	708	E-G	2558	FG	96	AB	95	A	7	E-H	1	EF
Brassicas
Vivant	Hybrid (turnip x rapeseed)	Brassica	0.2	HI	0.3	J	334	HI	698	J	74	F-H	56	DE	53	AB	51	A
Aerifi	Radish	Brassica	0.2	G-I	0.3	J	410	G-I	630	J	72	GH	55	DE	54	AB	53	A
Jackpot	Turnip	Brassica	0.2	I	0.4	J	311	I	716	J	77	F-H	65	CD	56	A	50	A
Mixes
Bates RS4 (20%) + Dixie (80%)	Cereal Rye + Crimson Clover	Mix	0.6	CD	1.5	C-G	1299	CD	2980	C-G	75	F-H	17	HI	8	E-H	4	C
Bates RS4 (20%) + AU Merit (80%)	Cereal Rye + Hairy Vetch	Mix	0.8	C	1.5	B-F	1508	C	3076	B-F	82	D-G	25	G-I	3	H	0	F
Bates RS4 (10%) + Dixie (90%)	Cereal Rye + Crimson Clover	Mix	0.6	CD	1.8	A-C	1299	CD	3685	A-C	74	F-H	29	F-H	8	E-H	4	C-E
Bates RS4 (10%) + AU Merit (90%)	Cereal Rye + Hairy Vetch	Mix	0.7	C	1.8	A-D	1310	C	3653	A-D	88	B-D	33	FG	4	F-H	0	F
Yankee (20%) + Dixie (80%)	Cereal Rye + Crimson Clover	Mix	0.4	E-G	1.4	E-G	715	E-G	2843	E-G	77	F-H	24	G-I	12	DE	4	C
Yankee (20%) + AU Merit (80%)	Cereal Rye + Hairy Vetch	Mix	0.4	EF	1.5	B-F	742	EF	3029	B-F	82	D-G	33	FG	5	F-H	0	F
TN1902 (20%) + Dixie (80%)	Wheat + Crimson Clover	Mix	0.4	EF	1.1	GH	759	EF	2198	GH	91	A-D	53	DE	21	C	6	BC
TN1902 (20%) + AU Merit (80%)	Wheat + Hairy Vetch	Mix	0.4	EF	1.4	E-G	814	EF	2804	E-G	95	A-C	45	EF	10	D-F	0	F
Cereals
Average			0.7		1.8		1383		3559		53		14		5		3
Min			0.3		1.2		635		2464		45		10		3		2
Max			1.0		2.1		1956		4236		68		19		12		5
Range			0.7		0.9		1321		1772		23		9		8		3
Legumes
Average			0.2		0.8		456		1521		93		90		31		27
Min			0.1		0.3		191		651		77		59		3		0
Max			0.5		1.3		998		2558		100		100		57		57
Range			0.4		1.0		807		1908		23		41		53		57
Brassicas
Average			0.2		0.3		352		681		74		59		54		51
Min			0.2		0.3		311		630		72		55		53		50
Max			0.2		0.4		410		716		77		65		56		53
Range			0.0		0.0		99		86		5		10		3		3
Mixes
Average			0.5		1.5		1056		3033		83		32		9		2
Min			0.4		1.1		715		2198		74		17		3		0
Max			0.8		1.8		1508		3685		95		53		21		6
Range			0.4		0.7		793		1487		21		37		18		6
Across Groups
Average			0.4		1.2		878		2438		77		48		20		16
Standard Error			0.3		0.6		533		1211		17		33		22		22
Min			0.1		0.3		191		630		45		10		3		0
Max			1.0		2.1		1956		4236		100		100		57		57
Range			0.9		1.8		1765		3606		54		90		54		57
ANOVA p-values
– Variety			<0.001		<0.001		<0.001		<0.001		<0.001		<0.001		<0.001		<0.001
– Location			<0.001		N.S.		<0.001		N.S.		<0.001		<0.001		<0.001		<0.001
– Variety x Location			<0.001		<0.001		<0.001		<0.001		0.025		<0.001		<0.001		<0.001

† Varieties that have any MS letter in common are not significantly different (Fisher’s Protected LSD, P<0.05). Mean separation letters are highlighted in dark orange for values that are not statistically different from the highest value across all entries within a given trait. Mean values between the 50th and 75th percentile are highlighted in light orange, mean values above the 75th percentile are highlighted in dark orange. § For analysis, values transformed using (value)^2 due to non-normal distribution. Untransformed means and summary statistics are reported. ‡ For analysis, values transformed using log (value+1) due to non-normal distribution. Untransformed means and summary statistics are reported. ‡‡ Non-normal distribution, means reported ¶ Analyzed using near infrared spectroscopy (NIRS) with the appropriate calibration for each species. Reported on a 100% DM basis. †† Estimated using quality constituents from NIRS inputted into the UGA cover crop nitrogen calculator.

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Virginia Sykes

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Table 16. Early Nov. Planted, Across Location, Biomass and Weed Suppression

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