Central California Winegrowers- Research and Demonstration Plots “Growers –Abraham Brothers –Kris Ritchie –Steve Schafer –Eric Shannon –Gary Wilson –Andrew Zaninovich Support: –Ron Metzler –Dave Loquaci and Research Advisory Team –Students Oren Kaye, Krystal Goulart, Kevin Kirn, Dave McGary, Brian Irivne, Brian Terrizi

A research project with six different growers and seven locations??!

Central California Winegrowers- Research and Demonstration Plots Scheduled 2 year project Six Cooperating growers Seven vineyards Four grape varieties –SY; MR; RC; BA Two irrigation treatments Drip and Furrow

Central California Winegrowers- Research and Demonstration Plots 300 to 1500 gal/vine -9 to -15 bars Yields (tons/acre) –Syrah 5.9 to 15 –Merlot 6.5 to 8.3 –Barbera 5.8 to 7.3 –R. Cabernet 7.1 to 8.1 Brix at harvest –< 0.5 between trts.

Central California Winegrowers- Research and Demonstration Plots Applied irrigation Water potential IR (leaf – air temperature differential) Yield parameters (cl/v; br/cl; g/br) Yield / vine and yield / ac Fruit Chemistry (Brix, pH, TA, etc) –Wet chemistry, FTIR, NIR Wine Chemistry (EtOH, pH, +6 others) –FTIR, NIR, (color)

Central California Winegrowers- Research and Demonstration Plots Crop loss –Syrah (.5 to 1.5T/ac) –Merlot (1 to 1.5 T/ac) –Barbera (~1.5 T/ac) –R. Cab. (1 T/ac) Color –Syrah (+) –Merlot (-)

Central California Winegrowers- Research and Demonstration Plots

175 berries/cluster Loss of 0.2g/berry 35 g / cluster 120 clusters/vine 4200g / vine 566 vines/ac 2,377,200g/ac5,236lb/ac 2.62 T/ac

Central California Winegrowers- Research and Demonstration Plots

Plans for 2005 –Vineyards –Data additions Soil moisture (GlobalAg Services) Geolocation of data and relative to soil type Hang time Wine quality