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.
VarietyCommon NameGroupBiomass (DM ton/ac)   Biomass (DM lb/ac)   Weed Proportion (%)       
AprMayAprMayDec‡Feb‡Apr‡May
Cereals
Bates RS4Cereal RyeCereal2.1A3.6A4293A7199A0RS0U3MN4M-O
ElbonCereal RyeCereal1.4D-F3.1A-C2736D-F6196A-C0Q-S2Q-U3MN5M-O
NF95319BCereal RyeCereal2.0AB3.1AB4071AB6264AB1P-S1TU3MN8L-O
NF97325Cereal RyeCereal1.8BC3.3A3583BC6575A1P-S3P-U3MN8L-O
NF99362Cereal RyeCereal1.6CD3.0A-D3204CD5911A-D0Q-S3N-S3MN5M-O
TriCal RayCereal RyeCereal1.9A-C3.4A3700A-C6849A0S1S-U2N8L-O
YankeeCereal RyeCereal0.8I-P2.6B-E1672I-P5140B-E0RS2S-U6J-N8L-O
TriCal EXP 20T06TriticaleCereal1.8A-C3.1A-C3638A-C6191A-C1O-S2R-U3MN5M-O
TriCal EXP 21T01TriticaleCereal1.6CD2.5B-F3191CD5020B-F1N-S3Q-U4L-N6L-O
TriCal Flex 719TriticaleCereal1.1F-J2.3D-G2166F-J4672D-G3N-S11O-T8J-N12K-O
TriCal SurgeTriticaleCereal1.2F-I2.1E-H2341F-I4254E-H13I-N7N-S5K-N9K-O
TN1902WheatCereal0.9H-N2.0E-I1814H-N3975E-I5L-S6O-T8J-N10K-O
Legumes
FIXatioNClover, BalansaLegume0.5O-S0.6O-S1061O-S1239O-S69AB75AB63AB52C-E
ParadanaClover, BalansaLegume0.4RS0.4Q-S834RS875Q-S74AB84A73AB65A-C
TaipanClover, BalansaLegume0.4S0.4RS787S708RS89A77AB82A57B-E
ViperClover, BalansaLegume0.7K-S0.5O-S1364K-S1090O-S89A80AB65AB46D-F
FrostyClover, BerseemLegume0.8J-Q1.4I-N1604J-Q2741I-N18D-F27D-F19E-G14J-O
LightningClover, BerseemLegume0.9H-M1.1L-Q1845H-M2198L-Q35CD37C-E26D-F21H-L
*UF_CC_17Clover, CrimsonLegume0.6L-S1.0L-R1205L-S1957L-R23D-H26D-G28EF34F-H
DixieClover, CrimsonLegume0.7K-S1.8G-K1333K-S3577G-K14G-K15I-O13F-I18I-N
Kentucky PrideClover, CrimsonLegume0.8J-R1.4I-M1526J-R2869I-M13F-J12F-L15E-H15J-O
GO-PER-12Clover, PersianLegume0.5O-S0.4Q-S1040O-S896Q-S60A-C58A-C68AB50C-E
DynamiteClover, RedLegume0.5O-S0.8M-S1019O-S1594M-S38B-D35D-F45A-C29G-J
Q (FL24D)Clover, RedLegume0.5Q-S0.5P-S936Q-S983P-S28CD41B-D61AB43E-G
*UF_WC_LateOcoeeClover, WhiteLegume0.4S0.1S766S287S94A93A72AB75A
*UF_WC_ML17Clover, WhiteLegume0.4S0.2S726S478S85A90A77AB60A-D
AU MeritVetch, HairyLegume1.0G-K1.1K-P1989G-K2263K-P10E-I14H-N7H-M4M-O
PatagoniaVetch, HairyLegume0.8I-O1.0L-R1693I-O1994L-R19E-I26G-M14G-L8K-O
WinterKingVetch, HairyLegume1.0F-K1.3I-N2036F-K2671I-N32DE40D-F5J-N3NO
SurvivorWinter PeaLegume1.2F-H1.5H-L2456F-H3000H-L31D-G42D-H7I-M8K-O
Brassicas
VivantHybrid (turnip x rapeseed)Brassica0.6M-S0.7N-S1192M-S1461N-S5I-N10J-P13E-G13K-O
AerifiRadishBrassica0.6N-S0.3S1129N-S559S8H-L15F-K48A-C62A-C
CCS-779RadishBrassica0.5P-S0.6O-S980P-S1294O-S10F-J23E-I40B-D53C-E
DrillerRadishBrassica0.5O-S0.3S1027O-S593S8I-P28D-F58AB72AB
FragiBlasterRadishBrassica0.7K-S0.7O-S1380K-S1304O-S8H-M12H-N21C-E31F-I
Jackpot TurnipBrassica0.5O-S0.5O-S1092O-S1095O-S5H-M16F-J18D-F19H-M
Mixes
Bates RS4 (20%) + Dixie (80%)Cereal Rye + Crimson CloverMix2.0AB3.5A3975AB6946A5J-Q5L-R18G-J7L-O
Bates RS4 (20%) + AU Merit (80%)Cereal Rye +
Hairy Vetch
Mix1.8A-C3.1A-C3682A-C6115A-C2N-S3O-T2N3O
Bates RS4 (10%) + Dixie (90%)Cereal Rye + Crimson CloverMix1.3D-G3.1A-C2692D-G6196A-C2K-R7J-Q4L-N13K-O
Bates RS4 (10%) + AU Merit (90%)Cereal Rye +
Hairy Vetch
Mix1.6C-E2.6B-E3170C-E5198B-E11I-N3O-T6MN7L-O
Yankee (20%) +
Dixie (80%)
Cereal Rye + Crimson CloverMix0.8J-Q2.4C-G1604J-Q4853C-G2M-S7K-Q11G-K13K-O
Yankee (20%) +
AU Merit (80%)
Cereal Rye +
Hairy Vetch
Mix0.9H-L1.8F-J1900H-L3685F-J5I-O3O-T7I-M8L-O
TN1902 (20%) +
Dixie (80%)
Wheat +
Crimson Clover
Mix1.2E-H2.2E-G2482E-H4408E-G2N-S3P-T13G-J14J-O
TN1902 (20%) +
AU Merit (80%)
Wheat +
Hairy Vetch
Mix1.0H-K1.2J-O1976H-K2407J-O18H-M11M-R18H-M23H-K
Cereals
Average1.52.8303456872347
Min0.82.0167239750024
Max2.13.6429371991311812
Range1.31.626213225131068
Legumes
Average0.70.91345174646494133
Min0.40.1726287101253
Max1.21.82456357794938275
Range0.91.61730329083827772
Brassicas
Average0.60.5113310517173342
Min0.50.39805595101313
Max0.70.71380146110285872
Range0.20.54009025184458
Mixes
Average1.32.526854976651011
Min0.81.2160424072323
Max2.03.53975694618111823
Range1.22.3237045391781721
Across Groups
Average1.01.72021331321242423
Standard Error0.51.11045220528282522
Min0.40.17262870023
Max2.13.64293719994938275
Range1.83.53567691294938073
ANOVA p-values
– Variety<0.001<0.001<0.001<0.001<0.001<0.001<0.001<0.001
– Location<0.001N.S.<0.001N.S.<0.001<0.001<0.001<0.001
– Variety x Location<0.001<0.001<0.001<0.0010.025<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.
Virginia Sykes
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