Evaluation of Reduced a uat o o educedFall-Timed, Tillage Operations
Gene Miyao, UC Farm Advisor, Yolo, Solano & Sacramento countiesJeff Mitchell, Veg Crops Specialist, UC DavisTim Hartz, Veg Crops Specialist, UC Davis
Gene Miyao, UC Farm Advisor, Yolo, Solano & Sacramento countiesJeff Mitchell, Veg Crops Specialist, UC DavisTim Hartz, Veg Crops Specialist, UC Davis, g p p ,Shrini Upadhyaya & Leroy Garciano, Ag Engineering Dept, UCD
, g p p ,Shrini Upadhyaya & Leroy Garciano, Ag Engineering Dept, UCD
Approaching No-Till:Approaching No-Till:pp oac g oFresh Market tomatoesw/ buried drip irrigation
pp oac g oFresh Market tomatoesw/ buried drip irrigationp gp g
Major Challenges for Processingtomato growers:
Major Challenges for Processingtomato growers:
Furrow irrigation w/ high residueWeed control w/out cultivationMechanical harvest w/ residue
Furrow irrigation w/ high residueWeed control w/out cultivationMechanical harvest w/ residueMechanical harvest w/ residue
& minimally disturbed soilsMechanical harvest w/ residue
& minimally disturbed soils
STANDARDTILLAGETILLAGE
Fall-Timed, Primary TILLAGE
REDUCEDTILLAGE
FALLOW(Conventional)A
STANDARDTILLAGE
CHISEL BED CENTER
( )
BTILLAGE
COVER CROP TRITICALE
BED CENTER
C
Fall-Timed TILLAGETRITICALE
REDUCEDTILLAGE
FALLOW(Conventional)A
STANDARDTILLAGE
CHISEL BED CENTER
( )
BTILLAGE
COVER CROPTRITICALE
BED CENTER
C
Fall-Timed TILLAGETRITICALE
FALLOW
REDUCEDCHISEL
FALLOW(Conventional)A
TILLAGE CHISEL BED CENTERB
COVER CROP TRITICALE
C
Reduced Fall Tillage Comparison,
Net canopy
UC Davis, 2007
Treatment Yield % coverTillage (Tons/A) color Brix sun lumensStandard Till Chisel Center 23.8 22.9 6.2 23 0.117Standard Till none 25 2 23 0 5 9 20 0 114
Similar yield between tillage systemsStandard Till none 25.2 23.0 5.9 20 0.114
Reduced Till Chisel Center 24.5 23.9 5.8 21 0.150Reduced Till none 24.1 24.1 5.8 22 0.159
g y
Bed chisel – no response in 1st year
Standard till 25.9 23.0 6.0 19.3 0.117Reduced till 24.3 23.9 5.9 22.6 0.159
Probability NS 0.015 0.03 NS 0.0001
response in 1st year
Slight reduction in PTAB l b i d
Chisel Center 24.2 23.4 6.0 21.8 0.134none 24.6 23.6 5.8 20.7 0.137
Probability NS NS 0 10 NS 0 13
PTAB color, brix, and early plant growth
Probability NS NS 0.10 NS 0.13Interaction NS NS 0.01 NS NS%CV 11 1 3 37 7
Reduced Fall Tillage Comparison Reduced Fall Tillage Comparison Effect on Yield (tons/A)
UC Davis, 2008Effect on Yield (tons/A)
UC Davis, 2008,,
Tillage MethodConventional Reduced
Chisel (bed center) 33.5 z 40.1 al bTriticale 32.4 z 27.5 b
Fallow 30.9 z 31.1 bLSD (@ 0 05) 5 0 7 5LSD (@ 0.05) 5.0 7.5
R lt Till T i l UC D i R lt Till T i l UC D i Results: Tillage Trials, UC Davis 2007 & 2008
Results: Tillage Trials, UC Davis 2007 & 2008
Comparable fruit yields between standard vs reduced fall tillage
Comparable fruit yields between standard vs reduced fall tillagestandard vs. reduced fall tillage.
Benefit of single chisel in bed center w/ reduced tillage system?
standard vs. reduced fall tillage.Benefit of single chisel in bed center w/ reduced tillage system?reduced tillage system? reduced tillage system?
Continue on UC Davis campus field siteContinue on UC Davis campus field siteFuture Plans:Future Plans:
Continue on UC Davis campus field siteExpand testing into grower fieldsContinue on UC Davis campus field siteExpand testing into grower fields
Funding Support: California Tomato Research InstituteField Assistance: Mark Kochi, Yolo County field assistantJim Jackson, Fred Stewart, Franciso Rodriquez & crew, Jim Jackson, Fred Stewart, Franciso Rodriquez & crew,
Plant Sciences Department, UC DavisStudents Sara Pearson (Chico) & Margaret Lloyd (UCD)E & J FarmsE & J FarmsSupplies:T S & LAg Seeds Unlimited
Strip-tilling cover crop ahead oftransplanting tomatoes
Strip-tilling cover crop ahead oftransplanting tomatoes
Sano Farms, Firebaugh, 2006Sano Farms, Firebaugh, 2006
Strip-till planted processing tomatoesFirebaugh, CA 2006
PROCESSING TOMATOESPROCESSING TOMATOESPROCESSING TOMATOESSTRIP-TILL PLANTED INTOTRITICALE COVER CROP
PROCESSING TOMATOESSTRIP-TILL PLANTED INTOTRITICALE COVER CROPTRITICALE COVER CROP
FIREBAUGH, CA 2005TRITICALE COVER CROP
FIREBAUGH, CA 2005
Tomato Yields 2000-2008
70
Tomato Yield (tons/A)UC Westside Research & Extension Center
60
65
70
stnostccctno
UC Westside Research & Extension Center
Conservation Tillage
50
55
60ctcc
40
45
30
35
Standard Tillage
20
25
2000 2001 2002 2003 2004 2005 2006 2007 2008Year
The EndThe End