Evaa uat o o educedluation of Reduced Fall-Timed, Tillage ...vric. workgroup/vc3-2008...¢  Jeff Mitchell,

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  • Evaluation of Reduced a uat o o educed Fall-Timed, Tillage Operations

    Gene Miyao, UC Farm Advisor, Yolo, Solano & Sacramento counties Jeff Mitchell, Veg Crops Specialist, UC Davis Tim Hartz, Veg Crops Specialist, UC Davis

    Gene Miyao, UC Farm Advisor, Yolo, Solano & Sacramento counties Jeff Mitchell, Veg Crops Specialist, UC Davis Tim 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 o Fresh Market tomatoes w/ buried drip irrigation

    pp oac g o Fresh Market tomatoes w/ buried drip irrigationp gp g

    Major Challenges for Processing tomato growers:

    Major Challenges for Processing tomato growers:

    Furrow irrigation w/ high residue Weed control w/out cultivation Mechanical harvest w/ residue

    Furrow irrigation w/ high residue Weed control w/out cultivation Mechanical harvest w/ residueMechanical harvest w/ residue

    & minimally disturbed soils Mechanical harvest w/ residue

    & minimally disturbed soils

  • STANDARD TILLAGETILLAGE

    Fall-Timed, Primary TILLAGE

    REDUCED TILLAGE

  • FALLOW (Conventional)A

    STANDARD TILLAGE

    CHISEL BED CENTER

    ( )

    BTILLAGE

    COVER CROP TRITICALE

    BED CENTER

    C

    Fall-Timed TILLAGE TRITICALE

    REDUCED TILLAGE

  • FALLOW (Conventional)A

    STANDARD TILLAGE

    CHISEL BED CENTER

    ( )

    BTILLAGE

    COVER CROP TRITICALE

    BED CENTER

    C

    Fall-Timed TILLAGE TRITICALE

    FALLOW

    REDUCED CHISEL

    FALLOW (Conventional)A

    TILLAGE CHISEL BED CENTERB

    COVER CROP TRITICALE

    C

  • Reduced Fall Tillage Comparison,

    Net canopy

    UC Davis, 2007

    Treatment Yield % cover Tillage (Tons/A) color Brix sun lumens Standard Till Chisel Center 23.8 22.9 6.2 23 0.117 Standard 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 0.150 Reduced 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 0.117 Reduced 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 0.134 none 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 0.13 Interaction 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, 2008 Effect on Yield (tons/A)

    UC Davis, 2008,,

    Tillage Method Conventional Reduced

    Chisel (bed center) 33.5 z 40.1 a l bTriticale 32.4 z 27.5 b

    Fallow 30.9 z 31.1 b LSD (@ 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 site Future Plans:Future Plans:

    Continue on UC Davis campus field site Expand testing into grower fields Continue on UC Davis campus field site Expand testing into grower fields

  • Funding Support: California Tomato Research Institute Field Assistance: Mark Kochi, Yolo County field assistant Jim Jackson, Fred Stewart, Franciso Rodriquez & crew, Jim Jackson, Fred Stewart, Franciso Rodriquez & crew,

    Plant Sciences Department, UC Davis Students Sara Pearson (Chico) & Margaret Lloyd (UCD) E & J FarmsE & J Farms Supplies: T S & L Ag Seeds Unlimited

  • Strip-tilling cover crop ahead of transplanting tomatoes

    Strip-tilling cover crop ahead of transplanting tomatoes

    Sano Farms, Firebaugh, 2006Sano Farms, Firebaugh, 2006

  • Strip-till planted processing tomatoes Firebaugh, CA 2006

  • PROCESSING TOMATOESPROCESSING TOMATOESPROCESSING TOMATOES STRIP-TILL PLANTED INTO TRITICALE COVER CROP

    PROCESSING TOMATOES STRIP-TILL PLANTED INTO TRITICALE COVER CROPTRITICALE COVER CROP

    FIREBAUGH, CA 2005 TRITICALE COVER CROP

    FIREBAUGH, CA 2005

  • Tomato Yields 2000-2008

    70

    Tomato Yield (tons/A) UC Westside Research & Extension Center

    60

    65

    70

    stno stcc ctno

    UC Westside Research & Extension Center

    Conservation Tillage

    50

    55

    60 ctcc

    40

    45

    30

    35

    Standard Tillage

    20

    25

    2000 2001 2002 2003 2004 2005 2006 2007 2008 Year

  • The EndThe End