Milan mean biomass, nitrogen content, and nitrogen release

Table 9-a. By location mean biomass, percent total nitrogen content‡, and estimated nitrogen release§ of 60 cover crop varieties evaluated in small plot replicated trials at the University of Tennessee AgResearch and Education Center at Milan in Milan, TN during 2019-2020.

VarietyCommon NameGroupBiomass
(DM tons/ac)
  Total Nitrogen
(%)
  Estimated N Released:
Apr. Term. (lbs/ac)
 Estimated N Released:
May. Term. (lbs/ac)
 
Apr†MayAprMay2 wks.4 wks.12 wks.2 wks.4 wks.12 wks.
Brassicas
ImpactCollardsBrassica0.2S-Y0.6QR2.1J-N2.1L-Q0131212
ExtenderHyb. BrassicaBrassica0.5I-R1I-R2.1J-P1.7N-S1180110
VivaHyb. BrassicaBrassica0.5K-U0.8L-R1.8J-Q1.5R-U015016
VivantHyb. BrassicaBrassica0.3P-Y0.5R1.9J-Q2.1L-P014018
AerifiRadishBrassica0.7E-L1.7B-M2.2J-M1.6O-S12111117
DiggerRadishBrassica0.5H-R1.3E-R2.1J-N1.6O-S1180113
DrillerRadishBrassica0.5H-R0.9K-R2.2J-L1.8N-S1281112
SERALPHARadishBrassica0.6G-P1.2E-R2.3JK1.5Q-T1290111
SERWF19RadishBrassica0.7D-K1.7B-L2.4IJ1.4R-W12130112
SmartRadishBrassica0.4K-U1.2E-R2.2J-M1.4S-W117018
Jackpot TurnipBrassica0.2P-Y0.8L-R2.1J-O1.5P-V014017
Average0.51.12.11.71170111
Min0.20.51.81.4013016
Max0.71.72.42.112131217
Range0.61.20.60.711101111

† Varieties that have any MS letter in common are not significantly different (Fisher’s Protected LSD, P<0.05). Mean separation was performed across all entries. Varieties within the “A group” were top performers across all entries and mean separation letters of these entries are highlighted in dark orange.
For ease of viewing, the table is broken into functional groups (brassicas, cereals, legumes). Mean values for top performers within each functional group are highlighted in light orange (50th – 75th percentile) and dark orange (> 75th percentile).
‡ Analyzed using near infrared spectroscopy (NIRS) with the appropraite calibration for each species.
§ Estimated using quality constituents from NIRS inputted into the UGA cover crop nitrogen calculator.

 

Table 9-b. By location mean biomass, percent total nitrogen content‡, and estimated nitrogen release§ of 60 cover crop varieties evaluated in small plot replicated trials at the University of Tennessee AgResearch and Education Center at Milan in Milan, TN during 2019-2020.

VarietyCommon NameGroupBiomass
(DM tons/ac)
  Total Nitrogen
(%)
  Estimated N Released:
Apr. Term. (lbs/ac)
 Estimated N Released:
May. Term. (lbs/ac)
 
Apr†MayAprMay2 wks.4 wks.12 wks.2 wks.4 wks.12 wks.
Cereals
CenturionAnnual RyegrassCereal0.4K-V1.6B-N1.5O-Q0.9W-Y003002
LowboyAnnual RyegrassCereal0.1W-Y0.6P-R2.2J-M1.3S-X001004
140760BarleyCereal0.4K-U1.2E-R1.5PQ0.8W-Y00200-2
140789BarleyCereal0.3O-Y1.2F-R1.7K-Q1T-Y002001
140797BarleyCereal0.3N-Y1H-R1.7K-Q1U-Y00300-2
SB255BarleyCereal0.4K-V1.5C-P1.6L-Q0.9V-Y003000
SecretariatBarleyCereal0.4M-X1.3E-R1.7J-Q0.9T-Y003001
Bates RS4Cereal RyeCereal0.8B-J1.8B-K1.3Q0.6Y00200-6
Elbon (1)Cereal RyeCereal0.7F-N1.7B-M1.5N-Q0.7Y00300-4
Elbon (2)Cereal RyeCereal0.4K-U1.4C-P1.8J-Q0.9W-Y01300-1
GokuCereal RyeCereal0.5J-T1.6B-N1.6M-Q0.8XY00200-3
NF95319BCereal RyeCereal0.9B-G1.9B-G1.3Q0.6Y00200-6
NF97325Cereal RyeCereal0.8C-J2B-F1.4Q0.7XY00200-5
NF99362Cereal RyeCereal0.9B-I1.8B-J1.3Q0.7Y00200-4
Wintergrazer 70Cereal RyeCereal1.1A-D2.1B-E1.3Q0.7Y00200-5
YankeeCereal RyeCereal0.2R-Y1.1G-R2.2J-M1T-Y003000
BobOatCereal0.4K-U1.7B-K1.5PQ0.8XY0030-1-2
CosaqueOatCereal0.5I-S1.6B-N1.3Q0.8XY0030-1-2
HilliardWheatCereal0.4K-U1.9B-H1.5PQ0.8XY0030-1-2
Liberty 5658WheatCereal0.6G-N1.4D-P1.4Q0.8XY00300-2
Average0.51.51.60.800300-2
Min0.10.61.30.60010-1-6
Max1.12.12.21.3013004
Range11.40.90.60120110

† Varieties that have any MS letter in common are not significantly different (Fisher’s Protected LSD, P<0.05). Mean separation was performed across all entries. Varieties within the “A group” were top performers across all entries and mean separation letters of these entries are highlighted in dark orange.
For ease of viewing, the table is broken into functional groups (brassicas, cereals, legumes). Mean values for top performers within each functional group are highlighted in light orange (50th – 75th percentile) and dark orange (> 75th percentile).
‡ Analyzed using near infrared spectroscopy (NIRS) with the appropraite calibration for each species.
§ Estimated using quality constituents from NIRS inputted into the UGA cover crop nitrogen calculator.

 

Table 9-c. By location mean biomass, percent total nitrogen content‡, and estimated nitrogen release§ of 60 cover crop varieties evaluated in small plot replicated trials at the University of Tennessee AgResearch and Education Center at Milan in Milan, TN during 2019-2020.

VarietyCommon NameGroupBiomass
(DM tons/ac)
  Total Nitrogen
(%)
  Estimated N Released:
Apr. Term. (lbs/ac)
 Estimated N Released:
May. Term. (lbs/ac)
 
Apr†MayApr‖May2 wks.4 wks.12 wks.2 wks.4 wks.12 wks.
Legumes
FIXatioNClover, BalansaLegume0.6H-Q1.5C-O4E-G2.9F-J24233750
ParadanaClover, BalansaLegume0.2Q-Y1.1F-R3HI2.1L-O0161323
ViperClover, BalansaLegume0.5J-T1.9B-F4.1E-G2.6I-L24213752
BaladyClover, BerseemLegume0Y0.8M-R.2.2K-P...1215
FrostyClover, BerseemLegume0.2P-Y1.9B-H3.5GH3.1E-I1173859
AU SunriseClover, CrimsonLegume0.3O-Y1.5C-P.2.2L-O0162428
BolsenaClover, CrimsonLegume0.4L-W1G-R3HI2.3K-N12101319
DixieClover, CrimsonLegume0.2R-Y1.6B-M.2.4J-M0152535
Kentucky PrideClover, CrimsonLegume0.1W-Y1J-R.2.2K-O0011320
SECCM18Clover, CrimsonLegume0.2T-Y1.6B-N2.9HI2.2K-N0142428
White CloudClover, CrimsonLegume0.2P-Y0.6P-R.2M-R0161110
Big RedClover, RedLegume0.1U-Y0.8L-R.2.9G-J0021325
BlazeClover, RedLegume0V-Y0.7O-R.3.5C-F0002427
GA9909Clover, RedLegume0XY0.8N-R.2.8H-J0001321
VNSClover, RedLegume0XY0.6P-R.3.7B-D0001325
VNSVetch, CommonLegume0.7D-K3.2A4E-G3.2D-H2526716117
AU MeritVetch, HairyLegume1.3A1.9B-G4.4B-E4.3A494851184
Patagonia IntaVetch, HairyLegume1.1A-E1.5C-P5.3A4.3A410564862
Purple BountyVetch, HairyLegume0.8C-J1.6B-N4.7A-D2.8H-K36362534
VillanaVetch, HairyLegume0.9B-H1.8B-I4.9A-C4.4A374251184
WinterKingVetch, HairyLegume1.2AB1.6B-O4.4C-E4.1AB48474967
NamoiVetch, WoolypodLegume0.6F-O1.4E-Q5.1AB3.9A-C25313755
Double OOWinter PeaLegume0.7F-M1.9B-I3.7FG3.4C-G24224967
SurvivorWinter PeaLegume0.9B-G2.4AB4.1D-G3.7B-D363441076
VNS (1)Winter PeaLegume0.8B-J2B-E4E-G3.9A-C253041077
VNS (2)Winter PeaLegume1A-F2.3B-D4.8A-C3.6B-E384641075
WindhamWinter PeaLegume0.6G-N1.9B-H4.2D-F3.6B-E242541075
WyoWinter (1)Winter PeaLegume0.8B-J2.3A-C4.4C-E4.1AB3634614101
WyoWinter (2)Winter PeaLegume1.1A-C1.8B-J4.1D-F3.8A-C37414968
Average0.51.64.13.224223751
Min00.62.920001110
Max1.33.25.34.441056716117
Range1.32.62.42.441056615107

† Varieties that have any MS letter in common are not significantly different (Fisher’s Protected LSD, P<0.05). Mean separation was performed across all entries. Varieties within the “A group” were top performers across all entries and mean separation letters of these entries are highlighted in dark orange.
For ease of viewing, the table is broken into functional groups (brassicas, cereals, legumes). Mean values for top performers within each functional group are highlighted in light orange (50th – 75th percentile) and dark orange (> 75th percentile).
‡ Analyzed using near infrared spectroscopy (NIRS) with the appropraite calibration for each species.
§ Estimated using quality constituents from NIRS inputted into the UGA cover crop nitrogen calculator.
‖ Entries with missing values did not have enough biomass to grind and analyze using NIRS.For entries with missing values for N content at RECM, mean N content across the remaining locations was used to estimate N release.

 

Table 9-d. Summary statistics and ANOVA p-values for by location mean biomass, percent total nitrogen content‡, and estimated nitrogen release§ of 60 cover crop varieties evaluated in small plot replicated trials at the University of Tennessee AgResearch and Education Center at Milan in Milan, TN during 2019-2020.

GroupBiomass
(DM tons/ac)
Total Nitrogen
(%)
Estimated N Released:
Apr. Term. (lbs/ac)
 Estimated N Released:
May. Term. (lbs/ac)
 
Apr†MayAprMay2 wks.4 wks.12 wks.2 wks.4 wks.12 wks.
Brassicas
Average0.51.12.11.71170111
Min0.20.51.81.4013016
Max0.71.72.42.112131217
Range0.61.20.60.711101111
Cereals
Average0.51.51.60.800300-2
Min0.10.61.30.60010-1-6
Max1.12.12.21.3013004
Range11.40.90.60120110
Legumes
Average0.51.64.13.224223751
Min00.62.920001110
Max1.33.25.34.441056716117
Range1.32.62.42.441056615107
Across Groups
Average0.51.52.72.112131326
Standard Error0.10.30.20.2002014
Min00.51.30.60000-1-6
Max1.33.25.34.441056716117
Range1.32.743.741056717123

‡ Analyzed using near infrared spectroscopy (NIRS) with the appropraite calibration for each species.
§ Estimated using quality constituents from NIRS inputted into the UGA cover crop nitrogen calculator.

Virginia Sykes
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