Root Distribution of Three Grapevine Rootstocks Grafted to Cabernet Sauvignon Grown on a Very Gravelly Clay Loam Soil in Oakville, California

Root distributions of the grapevine rootstocks AXR#1,110R, and St. George were examined at the UC Oakville Experimental Vineyard. Four trenches 1.2m deep were excavated 5 cm from the vine trunk for every rootstock and the presence of roots recorded. Root intersections with the trench profile were classified according to size (