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.

VarietyCommon NameGroupBiomass (DM ton/ac)   Biomass (DM lb/ac)   Weed Proportion (%)       
AprMayAprMayDec‡Feb‡Apr‡May
Cereals
Bates RS4Cereal RyeCereal1.4AB2.6A-D2864AB5258A-D0LM0I0I0H
ElbonCereal RyeCereal1.0B-J2.7A-D1944B-J5362A-D0M0I0I0H
NF95319BCereal RyeCereal1.2A-F2.4B-G2420A-F4709B-G1K-M1I0I0H
NF97325Cereal RyeCereal1.3A-D2.6A-D2514A-D5143A-D2H-M2HI0I0H
NF99362Cereal RyeCereal0.9C-J2.0D-J1808C-J4082D-J0K-M2HI0I0H
TriCal RayCereal RyeCereal1.2A-E3.3AB2462A-E6575AB0M0I0I0H
YankeeCereal RyeCereal0.5J-Q2.1D-I1019J-Q4186D-I0LM0I0I0H
TriCal EXP 20T06TriticaleCereal1.2A-E2.5A-F2493A-E5002A-F0LM0I0I0H
TriCal EXP 21T01TriticaleCereal1.1A-G2.3C-H2226A-G4557C-H2H-M0I0I0H
TriCal Flex 719TriticaleCereal0.7F-M2.2D-H1458F-M4333D-H0LM0I0I0H
TriCal SurgeTriticaleCereal0.8C-K2.0D-J1625C-K4003D-J1J-M0I0I0H
TN1902WheatCereal0.5I-Q1.4H-N1092I-Q2770H-N0K-M1I0I0H
Legumes
FIXatioNClover, BalansaLegume0.3M-Q0.7L-P502M-Q1312L-P63A-C55A-D43C-E27D-G
ParadanaClover, BalansaLegume0.2M-Q0.7L-P465M-Q1359L-P81AB72A-C67A-D42CD
TaipanClover, BalansaLegume0.1O-Q0.6M-P293O-Q1134M-P88A59A-C93AB33C-F
ViperClover, BalansaLegume0.3L-Q0.8L-P585L-Q1542L-P85A61A-C45A-E5GH
FrostyClover, BerseemLegume0.6H-P1.4H-N1171H-P2723H-N15D-G12EF5GH2H
LightningClover, BerseemLegume0.6G-O1.2I-O1233G-O2320I-O37C-E10EF15FG2H
*UF_CC_17Clover, CrimsonLegume0.6G-O1.6E-L1233G-O3198E-L25D-H22D-F8GH2H
DixieClover, CrimsonLegume0.7G-N2.4B-G1333G-N4719B-G2I-M1I3GH0H
Kentucky PrideClover, CrimsonLegume0.8D-L1.8D-K1537D-L3590D-K2I-M5F-H4GH0H
GO-PER-12Clover, PersianLegume0.1Q0.3OP172Q549OP75A-C67A-C95A53BC
DynamiteClover, RedLegume0.2M-Q0.9K-P496M-Q1814K-P35C-F8FG43A-E15F-H
Q (FL24D)Clover, RedLegume0.1PQ0.4N-P199PQ852N-P30B-D40B-E82A-C32C-F
*UF_WC_LateOcoeeClover, WhiteLegume0.1Q0.1P120Q225P99A90A97A83A
*UF_WC_ML17Clover, WhiteLegume0.1Q0.3OP120Q564OP90A83AB90A-C53BC
AU MeritVetch, HairyLegume1.0A-I1.4H-N2043A-I2754H-N5F-K3G-I3HI0H
PatagoniaVetch, HairyLegume0.8E-L1.1J-O1505E-L2216J-O5G-L1I2HI0H
WinterKingVetch, HairyLegume0.8C-K1.5F-L1615C-K3099F-L8D-I6F-H2HI0H
SurvivorWinter PeaLegume1.0B-J1.5G-M1960B-J2969G-M8G-L33F-H2HI2H
Brassicas
VivantHybrid (turnip x rapeseed)Brassica0.3K-Q0.5N-P685K-Q936N-P4H-M2HI7FG17E-H
AerifiRadishBrassica0.2N-Q0.3OP455N-Q596OP2H-M7F-H42C-E40CD
CCS-779RadishBrassica0.1O-Q0.3OP287O-Q596OP9E-K13FG40B-E38C-E
DrillerRadishBrassica0.1PQ0.1P225PQ277P4I-M38C-E78A-C73AB
FragiBlasterRadishBrassica0.3L-Q0.5N-P591L-Q993N-P7H-M3G-I23DE22D-H
Jackpot TurnipBrassica0.4K-Q0.5N-P747K-Q977N-P3H-M9F-H15EF17E-H
Mixes
Bates RS4 (20%) + Dixie (80%)Cereal Rye + Crimson CloverMix1.3A-C3.2A-C2577A-C6418A-C2I-M2G-I23GH2H
Bates RS4 (20%) + AU Merit (80%)Cereal Rye +
Hairy Vetch
Mix1.3A-D3.4A2519A-D6737A0M1I0I0H
Bates RS4 (10%) + Dixie (90%)Cereal Rye + Crimson CloverMix1.1A-G3.2A-C2226A-G6449A-C1J-M3G-I0I0H
Bates RS4 (10%) + AU Merit (90%)Cereal Rye +
Hairy Vetch
Mix1.5A3.2A-C2979A6303A-C2I-M1I0I0H
Yankee (20%) +
Dixie (80%)
Cereal Rye + Crimson CloverMix0.8C-K2.6A-D1625C-K5258A-D2H-M4G-I3HI0H
Yankee (20%) +
AU Merit (80%)
Cereal Rye +
Hairy Vetch
Mix0.9C-J1.9D-J1834C-J3747D-J6D-J2G-I2HI0H
TN1902 (20%) +
Dixie (80%)
Wheat +
Crimson Clover
Mix1.0B-J2.5A-E1970B-J5043A-E1K-M0I2HI2H
TN1902 (20%) +
AU Merit (80%)
Wheat +
Hairy Vetch
Mix1.1A-H1.5G-M2164A-H3026G-M4H-M0I0I0H
Cereals
Average1.02.3199446651000
Min0.51.4101927700000
Max1.43.3286465752200
Range0.91.9184538053200
Legumes
Average0.51.0921205242353919
Min0.10.11202252120
Max1.02.42043471999909783
Range1.02.21923449598899583
Brassicas
Average0.20.44987295123434
Min0.10.122527722717
Max0.40.57479939387873
Range0.30.45237167377257
Mixes
Average1.12.7223753732240
Min0.81.5162530260000
Max1.53.42979673764232
Range0.71.91354371164232
Across Groups
Average0.71.61395318818162113
Standard Error0.41.0860200230263221
Min0.10.11202250000
Max1.53.42979673799909783
Range1.43.32859651299909783
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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