Table 12. Early Oct. Planted, Spring Hill, TN, Biomass and Weed Suppression

Table 12. By 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 the Middle Tennessee AgResearch and Education Center, in Spring Hill, 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	1.4	AB	2.6	A-D	2864	AB	5258	A-D	0	LM	0	I	0	I	0	H
Elbon	Cereal Rye	Cereal	1.0	B-J	2.7	A-D	1944	B-J	5362	A-D	0	M	0	I	0	I	0	H
NF95319B	Cereal Rye	Cereal	1.2	A-F	2.4	B-G	2420	A-F	4709	B-G	1	K-M	1	I	0	I	0	H
NF97325	Cereal Rye	Cereal	1.3	A-D	2.6	A-D	2514	A-D	5143	A-D	2	H-M	2	HI	0	I	0	H
NF99362	Cereal Rye	Cereal	0.9	C-J	2.0	D-J	1808	C-J	4082	D-J	0	K-M	2	HI	0	I	0	H
TriCal Ray	Cereal Rye	Cereal	1.2	A-E	3.3	AB	2462	A-E	6575	AB	0	M	0	I	0	I	0	H
Yankee	Cereal Rye	Cereal	0.5	J-Q	2.1	D-I	1019	J-Q	4186	D-I	0	LM	0	I	0	I	0	H
TriCal EXP 20T06	Triticale	Cereal	1.2	A-E	2.5	A-F	2493	A-E	5002	A-F	0	LM	0	I	0	I	0	H
TriCal EXP 21T01	Triticale	Cereal	1.1	A-G	2.3	C-H	2226	A-G	4557	C-H	2	H-M	0	I	0	I	0	H
TriCal Flex 719	Triticale	Cereal	0.7	F-M	2.2	D-H	1458	F-M	4333	D-H	0	LM	0	I	0	I	0	H
TriCal Surge	Triticale	Cereal	0.8	C-K	2.0	D-J	1625	C-K	4003	D-J	1	J-M	0	I	0	I	0	H
TN1902	Wheat	Cereal	0.5	I-Q	1.4	H-N	1092	I-Q	2770	H-N	0	K-M	1	I	0	I	0	H
Legumes
FIXatioN	Clover, Balansa	Legume	0.3	M-Q	0.7	L-P	502	M-Q	1312	L-P	63	A-C	55	A-D	43	C-E	27	D-G
Paradana	Clover, Balansa	Legume	0.2	M-Q	0.7	L-P	465	M-Q	1359	L-P	81	AB	72	A-C	67	A-D	42	CD
Taipan	Clover, Balansa	Legume	0.1	O-Q	0.6	M-P	293	O-Q	1134	M-P	88	A	59	A-C	93	AB	33	C-F
Viper	Clover, Balansa	Legume	0.3	L-Q	0.8	L-P	585	L-Q	1542	L-P	85	A	61	A-C	45	A-E	5	GH
Frosty	Clover, Berseem	Legume	0.6	H-P	1.4	H-N	1171	H-P	2723	H-N	15	D-G	12	EF	5	GH	2	H
Lightning	Clover, Berseem	Legume	0.6	G-O	1.2	I-O	1233	G-O	2320	I-O	37	C-E	10	EF	15	FG	2	H
*UF_CC_17	Clover, Crimson	Legume	0.6	G-O	1.6	E-L	1233	G-O	3198	E-L	25	D-H	22	D-F	8	GH	2	H
Dixie	Clover, Crimson	Legume	0.7	G-N	2.4	B-G	1333	G-N	4719	B-G	2	I-M	1	I	3	GH	0	H
Kentucky Pride	Clover, Crimson	Legume	0.8	D-L	1.8	D-K	1537	D-L	3590	D-K	2	I-M	5	F-H	4	GH	0	H
GO-PER-12	Clover, Persian	Legume	0.1	Q	0.3	OP	172	Q	549	OP	75	A-C	67	A-C	95	A	53	BC
Dynamite	Clover, Red	Legume	0.2	M-Q	0.9	K-P	496	M-Q	1814	K-P	35	C-F	8	FG	43	A-E	15	F-H
Q (FL24D)	Clover, Red	Legume	0.1	PQ	0.4	N-P	199	PQ	852	N-P	30	B-D	40	B-E	82	A-C	32	C-F
*UF_WC_LateOcoee	Clover, White	Legume	0.1	Q	0.1	P	120	Q	225	P	99	A	90	A	97	A	83	A
*UF_WC_ML17	Clover, White	Legume	0.1	Q	0.3	OP	120	Q	564	OP	90	A	83	AB	90	A-C	53	BC
AU Merit	Vetch, Hairy	Legume	1.0	A-I	1.4	H-N	2043	A-I	2754	H-N	5	F-K	3	G-I	3	HI	0	H
Patagonia	Vetch, Hairy	Legume	0.8	E-L	1.1	J-O	1505	E-L	2216	J-O	5	G-L	1	I	2	HI	0	H
WinterKing	Vetch, Hairy	Legume	0.8	C-K	1.5	F-L	1615	C-K	3099	F-L	8	D-I	6	F-H	2	HI	0	H
Survivor	Winter Pea	Legume	1.0	B-J	1.5	G-M	1960	B-J	2969	G-M	8	G-L	33	F-H	2	HI	2	H
Brassicas
Vivant	Hybrid (turnip x rapeseed)	Brassica	0.3	K-Q	0.5	N-P	685	K-Q	936	N-P	4	H-M	2	HI	7	FG	17	E-H
Aerifi	Radish	Brassica	0.2	N-Q	0.3	OP	455	N-Q	596	OP	2	H-M	7	F-H	42	C-E	40	CD
CCS-779	Radish	Brassica	0.1	O-Q	0.3	OP	287	O-Q	596	OP	9	E-K	13	FG	40	B-E	38	C-E
Driller	Radish	Brassica	0.1	PQ	0.1	P	225	PQ	277	P	4	I-M	38	C-E	78	A-C	73	AB
FragiBlaster	Radish	Brassica	0.3	L-Q	0.5	N-P	591	L-Q	993	N-P	7	H-M	3	G-I	23	DE	22	D-H
Jackpot	Turnip	Brassica	0.4	K-Q	0.5	N-P	747	K-Q	977	N-P	3	H-M	9	F-H	15	EF	17	E-H
Mixes
Bates RS4 (20%) + Dixie (80%)	Cereal Rye + Crimson Clover	Mix	1.3	A-C	3.2	A-C	2577	A-C	6418	A-C	2	I-M	2	G-I	23	GH	2	H
Bates RS4 (20%) + AU Merit (80%)	Cereal Rye + Hairy Vetch	Mix	1.3	A-D	3.4	A	2519	A-D	6737	A	0	M	1	I	0	I	0	H
Bates RS4 (10%) + Dixie (90%)	Cereal Rye + Crimson Clover	Mix	1.1	A-G	3.2	A-C	2226	A-G	6449	A-C	1	J-M	3	G-I	0	I	0	H
Bates RS4 (10%) + AU Merit (90%)	Cereal Rye + Hairy Vetch	Mix	1.5	A	3.2	A-C	2979	A	6303	A-C	2	I-M	1	I	0	I	0	H
Yankee (20%) + Dixie (80%)	Cereal Rye + Crimson Clover	Mix	0.8	C-K	2.6	A-D	1625	C-K	5258	A-D	2	H-M	4	G-I	3	HI	0	H
Yankee (20%) + AU Merit (80%)	Cereal Rye + Hairy Vetch	Mix	0.9	C-J	1.9	D-J	1834	C-J	3747	D-J	6	D-J	2	G-I	2	HI	0	H
TN1902 (20%) + Dixie (80%)	Wheat + Crimson Clover	Mix	1.0	B-J	2.5	A-E	1970	B-J	5043	A-E	1	K-M	0	I	2	HI	2	H
TN1902 (20%) + AU Merit (80%)	Wheat + Hairy Vetch	Mix	1.1	A-H	1.5	G-M	2164	A-H	3026	G-M	4	H-M	0	I	0	I	0	H
Cereals
Average			1.0		2.3		1994		4665		1		0		0		0
Min			0.5		1.4		1019		2770		0		0		0		0
Max			1.4		3.3		2864		6575		2		2		0		0
Range			0.9		1.9		1845		3805		3		2		0		0
Legumes
Average			0.5		1.0		921		2052		42		35		39		19
Min			0.1		0.1		120		225		2		1		2		0
Max			1.0		2.4		2043		4719		99		90		97		83
Range			1.0		2.2		1923		4495		98		89		95		83
Brassicas
Average			0.2		0.4		498		729		5		12		34		34
Min			0.1		0.1		225		277		2		2		7		17
Max			0.4		0.5		747		993		9		38		78		73
Range			0.3		0.4		523		716		7		37		72		57
Mixes
Average			1.1		2.7		2237		5373		2		2		4		0
Min			0.8		1.5		1625		3026		0		0		0		0
Max			1.5		3.4		2979		6737		6		4		23		2
Range			0.7		1.9		1354		3711		6		4		23		2
Across Groups
Average			0.7		1.6		1395		3188		18		16		21		13
Standard Error			0.4		1.0		860		2002		30		26		32		21
Min			0.1		0.1		120		225		0		0		0		0
Max			1.5		3.4		2979		6737		99		90		97		83
Range			1.4		3.3		2859		6512		99		90		97		83
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.