Table 8. Early Oct. Planted, Knoxville, TN, Biomass and Weed Suppression

Table 8. 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 East Tennessee AgResearch and Education Center, in Knoxville, 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 RyeCereal2.9A4.6A5723A9141A0PQ1O7K-M8IJ
ElbonCereal RyeCereal1.8DE3.5B-E3528DE7029B-E1N-Q5K-N5LM10IJ
NF95319BCereal RyeCereal2.9A3.9A-C5723A7819A-C1O-Q1O5LM15H-J
NF97325Cereal RyeCereal2.3BC4.0AB4651BC8007AB0Q4L-O7K-M15H-J
NF99362Cereal RyeCereal2.3BC3.9A-C4599BC7740A-C0O-Q5K-N5LM10IJ
TriCal RayCereal RyeCereal2.5A-C3.6B-D4939A-C7123B-D0Q2NO3M15H-J
YankeeCereal RyeCereal1.2G-N3.0B-F2326G-N6094B-F1O-Q4M-O12H-L15H-J
TriCal EXP 20T06TriticaleCereal2.4A-C3.7A-D4782A-C7380A-D2M-Q4L-O7K-M10IJ
TriCal EXP 21T01TriticaleCereal2.1CD2.7D-H4155CD5482D-H0O-Q5K-N8I-M12IJ
TriCal Flex 719TriticaleCereal1.4E-K2.5F-H2874E-K5012F-H6K-Q22I-M15F-L23F-J
TriCal SurgeTriticaleCereal1.5E-H2.3F-I3057E-H4505F-I25E-K13G-L10I-M18G-J
TN1902WheatCereal1.3E-L2.6E-H2535E-L5179E-H10J-Q11J-N15F-L20G-J
Legumes
FIXatioNClover, BalansaLegume0.8L-O0.6M-Q1620L-O1165M-Q75AB96AB83A77A
ParadanaClover, BalansaLegume0.6O0.2PQ1202O392PQ68A-C97AB80AB88A
TaipanClover, BalansaLegume0.6O0.1Q1280O282Q90A95AB70A-C80A
ViperClover, BalansaLegume1.1H-O0.3O-Q2143H-O638O-Q93A100A85A86A
FrostyClover, BerseemLegume1.0I-O1.4I-N2038I-O2759I-N20C-H43A-F33A-H27E-J
LightningClover, BerseemLegume1.2F-M1.0K-Q2456F-M2075K-Q33A-F65A-D37A-G40D-G
*UF_CC_17Clover, CrimsonLegume0.6O0.4O-Q1176O716O-Q20C-I31C-G47A-E67A-C
DixieClover, CrimsonLegume0.7NO1.2J-O1333NO2435J-O27C-H29C-H23C-J37D-H
Kentucky PrideClover, CrimsonLegume0.8M-O1.1K-Q1516M-O2148K-Q23B-G18E-K27B-H30E-I
GO-PER-12Clover, PersianLegume1.0K-O0.6M-Q1908K-O1244M-Q45A-E48A-F40A-E47C-E
DynamiteClover, RedLegume0.8L-O0.7M-Q1542L-O1375M-Q41A-E63A-E47A-E43D-F
Q (FL24D)Clover, RedLegume0.8L-O0.6M-Q1672L-O1113M-Q27B-F42A-F40A-E53B-D
*UF_WC_LateOcoeeClover, WhiteLegume0.7NO0.2PQ1411NO350PQ88A97AB47A-E67A-C
*UF_WC_ML17Clover, WhiteLegume0.7NO0.2PQ1333NO392PQ80AB97AB63A-D67A-C
AU MeritVetch, HairyLegume1.0K-O0.9L-Q1934K-O1772L-Q16D-I25D-I10H-L8IJ
PatagoniaVetch, HairyLegume0.9K-O0.9L-Q1881K-O1772L-Q33C-I51A-E27D-J17H-J
WinterKingVetch, HairyLegume1.2F-M1.1J-P2456F-M2242J-P56A-D73A-C8J-M7J
SurvivorWinter PeaLegume1.5E-J1.5I-M2953E-J3031I-M53A-D51A-F12G-L15H-J
Brassicas
VivantHybrid (turnip x rapeseed)Brassica0.8L-O1.0K-Q1699L-O1986K-Q5H-N18E-K20E-K10IJ
AerifiRadishBrassica0.9L-O0.3O-Q1803L-O523O-Q14E-J23D-I53A-E83A
CCS-779RadishBrassica0.8L-O1.0K-Q1672L-O1991K-Q10F-L32B-G40A-G67A-C
DrillerRadishBrassica0.9L-O0.5N-Q1829L-O909N-Q12G-N17F-K37A-F70AB
FragiBlasterRadishBrassica1.1G-O0.8M-Q2169G-O1615M-Q9F-L22D-J18E-K40D-G
Jackpot TurnipBrassica0.7NO0.6M-Q1437NO1213M-Q7F-M22D-I20E-K22F-J
Mixes
Bates RS4 (20%) + Dixie (80%)Cereal Rye + Crimson CloverMix2.7AB3.7A-C5373AB7474A-C7I-O8I-N12H-L12IJ
Bates RS4 (20%) + AU Merit (80%)Cereal Rye +
Hairy Vetch
Mix2.4A-C2.7D-H4845A-C5493D-H3K-Q5K-N3M5J
Bates RS4 (10%) + Dixie (90%)Cereal Rye + Crimson CloverMix1.6E-G3.0C-G3157E-G5942C-G4J-P11G-L8I-M27E-J
Bates RS4 (10%) + AU Merit (90%)Cereal Rye +
Hairy Vetch
Mix1.7D-F2.0G-J3361D-F4092G-J21F-L6J-N12LM13IJ
Yankee (20%) +
Dixie (80%)
Cereal Rye + Crimson CloverMix0.8L-O2.2F-I1584L-O4448F-I2N-Q10H-M18E-K25E-J
Yankee (20%) +
AU Merit (80%)
Cereal Rye +
Hairy Vetch
Mix1.0J-O1.8H-L1965J-O3622H-L4L-Q3L-O12G-L15H-J
TN1902 (20%) +
Dixie (80%)
Wheat +
Crimson Clover
Mix1.5E-I1.9H-K2995E-I3773H-K4N-Q7I-N23C-J27E-J
TN1902 (20%) +
AU Merit (80%)
Wheat +
Hairy Vetch
Mix0.9L-O0.9L-Q1787L-O1787L-Q33F-M22E-K37C-I47C-E
Cereals
Average2.03.44074670946814
Min1.22.3232645050138
Max2.94.65723914125221523
Range1.72.33397463625211215
Legumes
Average0.90.71770143949624347
Min0.60.11176282161887
Max1.51.529533031931008588
Range0.91.41777274977827782
Brassicas
Average0.90.71768137310223149
Min0.70.314375235171810
Max1.11.02169199114325383
Range0.40.773214699163573
Mixes
Average1.62.3313345791091621
Min0.80.9158417872335
Max2.73.75373747433223747
Range1.92.83789568631193342
Across Groups
Average1.31.72646343824322734
Standard Error0.71.31350261728322326
Min0.60.111762820135
Max2.94.657239141931008588
Range2.34.44547885993998283
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
Scroll to Top