Table 4. Early Oct. Planted, Across Location, Biomass and Weed Suppression

Table 4. Across location mean biomass and weed suppression of 36 cover crop varieties and 8 mixes planted in early Oct. 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	2.1	A	3.6	A	4293	A	7199	A	0	RS	0	U	3	MN	4	M-O
Elbon	Cereal Rye	Cereal	1.4	D-F	3.1	A-C	2736	D-F	6196	A-C	0	Q-S	2	Q-U	3	MN	5	M-O
NF95319B	Cereal Rye	Cereal	2.0	AB	3.1	AB	4071	AB	6264	AB	1	P-S	1	TU	3	MN	8	L-O
NF97325	Cereal Rye	Cereal	1.8	BC	3.3	A	3583	BC	6575	A	1	P-S	3	P-U	3	MN	8	L-O
NF99362	Cereal Rye	Cereal	1.6	CD	3.0	A-D	3204	CD	5911	A-D	0	Q-S	3	N-S	3	MN	5	M-O
TriCal Ray	Cereal Rye	Cereal	1.9	A-C	3.4	A	3700	A-C	6849	A	0	S	1	S-U	2	N	8	L-O
Yankee	Cereal Rye	Cereal	0.8	I-P	2.6	B-E	1672	I-P	5140	B-E	0	RS	2	S-U	6	J-N	8	L-O
TriCal EXP 20T06	Triticale	Cereal	1.8	A-C	3.1	A-C	3638	A-C	6191	A-C	1	O-S	2	R-U	3	MN	5	M-O
TriCal EXP 21T01	Triticale	Cereal	1.6	CD	2.5	B-F	3191	CD	5020	B-F	1	N-S	3	Q-U	4	L-N	6	L-O
TriCal Flex 719	Triticale	Cereal	1.1	F-J	2.3	D-G	2166	F-J	4672	D-G	3	N-S	11	O-T	8	J-N	12	K-O
TriCal Surge	Triticale	Cereal	1.2	F-I	2.1	E-H	2341	F-I	4254	E-H	13	I-N	7	N-S	5	K-N	9	K-O
TN1902	Wheat	Cereal	0.9	H-N	2.0	E-I	1814	H-N	3975	E-I	5	L-S	6	O-T	8	J-N	10	K-O
Legumes
FIXatioN	Clover, Balansa	Legume	0.5	O-S	0.6	O-S	1061	O-S	1239	O-S	69	AB	75	AB	63	AB	52	C-E
Paradana	Clover, Balansa	Legume	0.4	RS	0.4	Q-S	834	RS	875	Q-S	74	AB	84	A	73	AB	65	A-C
Taipan	Clover, Balansa	Legume	0.4	S	0.4	RS	787	S	708	RS	89	A	77	AB	82	A	57	B-E
Viper	Clover, Balansa	Legume	0.7	K-S	0.5	O-S	1364	K-S	1090	O-S	89	A	80	AB	65	AB	46	D-F
Frosty	Clover, Berseem	Legume	0.8	J-Q	1.4	I-N	1604	J-Q	2741	I-N	18	D-F	27	D-F	19	E-G	14	J-O
Lightning	Clover, Berseem	Legume	0.9	H-M	1.1	L-Q	1845	H-M	2198	L-Q	35	CD	37	C-E	26	D-F	21	H-L
*UF_CC_17	Clover, Crimson	Legume	0.6	L-S	1.0	L-R	1205	L-S	1957	L-R	23	D-H	26	D-G	28	EF	34	F-H
Dixie	Clover, Crimson	Legume	0.7	K-S	1.8	G-K	1333	K-S	3577	G-K	14	G-K	15	I-O	13	F-I	18	I-N
Kentucky Pride	Clover, Crimson	Legume	0.8	J-R	1.4	I-M	1526	J-R	2869	I-M	13	F-J	12	F-L	15	E-H	15	J-O
GO-PER-12	Clover, Persian	Legume	0.5	O-S	0.4	Q-S	1040	O-S	896	Q-S	60	A-C	58	A-C	68	AB	50	C-E
Dynamite	Clover, Red	Legume	0.5	O-S	0.8	M-S	1019	O-S	1594	M-S	38	B-D	35	D-F	45	A-C	29	G-J
Q (FL24D)	Clover, Red	Legume	0.5	Q-S	0.5	P-S	936	Q-S	983	P-S	28	CD	41	B-D	61	AB	43	E-G
*UF_WC_LateOcoee	Clover, White	Legume	0.4	S	0.1	S	766	S	287	S	94	A	93	A	72	AB	75	A
*UF_WC_ML17	Clover, White	Legume	0.4	S	0.2	S	726	S	478	S	85	A	90	A	77	AB	60	A-D
AU Merit	Vetch, Hairy	Legume	1.0	G-K	1.1	K-P	1989	G-K	2263	K-P	10	E-I	14	H-N	7	H-M	4	M-O
Patagonia	Vetch, Hairy	Legume	0.8	I-O	1.0	L-R	1693	I-O	1994	L-R	19	E-I	26	G-M	14	G-L	8	K-O
WinterKing	Vetch, Hairy	Legume	1.0	F-K	1.3	I-N	2036	F-K	2671	I-N	32	DE	40	D-F	5	J-N	3	NO
Survivor	Winter Pea	Legume	1.2	F-H	1.5	H-L	2456	F-H	3000	H-L	31	D-G	42	D-H	7	I-M	8	K-O
Brassicas
Vivant	Hybrid (turnip x rapeseed)	Brassica	0.6	M-S	0.7	N-S	1192	M-S	1461	N-S	5	I-N	10	J-P	13	E-G	13	K-O
Aerifi	Radish	Brassica	0.6	N-S	0.3	S	1129	N-S	559	S	8	H-L	15	F-K	48	A-C	62	A-C
CCS-779	Radish	Brassica	0.5	P-S	0.6	O-S	980	P-S	1294	O-S	10	F-J	23	E-I	40	B-D	53	C-E
Driller	Radish	Brassica	0.5	O-S	0.3	S	1027	O-S	593	S	8	I-P	28	D-F	58	AB	72	AB
FragiBlaster	Radish	Brassica	0.7	K-S	0.7	O-S	1380	K-S	1304	O-S	8	H-M	12	H-N	21	C-E	31	F-I
Jackpot	Turnip	Brassica	0.5	O-S	0.5	O-S	1092	O-S	1095	O-S	5	H-M	16	F-J	18	D-F	19	H-M
Mixes
Bates RS4 (20%) + Dixie (80%)	Cereal Rye + Crimson Clover	Mix	2.0	AB	3.5	A	3975	AB	6946	A	5	J-Q	5	L-R	18	G-J	7	L-O
Bates RS4 (20%) + AU Merit (80%)	Cereal Rye + Hairy Vetch	Mix	1.8	A-C	3.1	A-C	3682	A-C	6115	A-C	2	N-S	3	O-T	2	N	3	O
Bates RS4 (10%) + Dixie (90%)	Cereal Rye + Crimson Clover	Mix	1.3	D-G	3.1	A-C	2692	D-G	6196	A-C	2	K-R	7	J-Q	4	L-N	13	K-O
Bates RS4 (10%) + AU Merit (90%)	Cereal Rye + Hairy Vetch	Mix	1.6	C-E	2.6	B-E	3170	C-E	5198	B-E	11	I-N	3	O-T	6	MN	7	L-O
Yankee (20%) + Dixie (80%)	Cereal Rye + Crimson Clover	Mix	0.8	J-Q	2.4	C-G	1604	J-Q	4853	C-G	2	M-S	7	K-Q	11	G-K	13	K-O
Yankee (20%) + AU Merit (80%)	Cereal Rye + Hairy Vetch	Mix	0.9	H-L	1.8	F-J	1900	H-L	3685	F-J	5	I-O	3	O-T	7	I-M	8	L-O
TN1902 (20%) + Dixie (80%)	Wheat + Crimson Clover	Mix	1.2	E-H	2.2	E-G	2482	E-H	4408	E-G	2	N-S	3	P-T	13	G-J	14	J-O
TN1902 (20%) + AU Merit (80%)	Wheat + Hairy Vetch	Mix	1.0	H-K	1.2	J-O	1976	H-K	2407	J-O	18	H-M	11	M-R	18	H-M	23	H-K
Cereals
Average			1.5		2.8		3034		5687		2		3		4		7
Min			0.8		2.0		1672		3975		0		0		2		4
Max			2.1		3.6		4293		7199		13		11		8		12
Range			1.3		1.6		2621		3225		13		10		6		8
Legumes
Average			0.7		0.9		1345		1746		46		49		41		33
Min			0.4		0.1		726		287		10		12		5		3
Max			1.2		1.8		2456		3577		94		93		82		75
Range			0.9		1.6		1730		3290		83		82		77		72
Brassicas
Average			0.6		0.5		1133		1051		7		17		33		42
Min			0.5		0.3		980		559		5		10		13		13
Max			0.7		0.7		1380		1461		10		28		58		72
Range			0.2		0.5		400		902		5		18		44		58
Mixes
Average			1.3		2.5		2685		4976		6		5		10		11
Min			0.8		1.2		1604		2407		2		3		2		3
Max			2.0		3.5		3975		6946		18		11		18		23
Range			1.2		2.3		2370		4539		17		8		17		21
Across Groups
Average			1.0		1.7		2021		3313		21		24		24		23
Standard Error			0.5		1.1		1045		2205		28		28		25		22
Min			0.4		0.1		726		287		0		0		2		3
Max			2.1		3.6		4293		7199		94		93		82		75
Range			1.8		3.5		3567		6912		94		93		80		73
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 appropraite calibration for each species. Reported on a 100% DM basis. †† Estimated using quality constituents from NIRS inputted into the UGA cover crop nitrogen calculator.