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Title supplied by cataloger. Written in pencil on back: "New method of cultivating vineyard Caterpillar 20 with new two-way uni-tiller plow cleans iout a whole row in one trip." Written in pencil on back: "FS-2161" and "CHS2011.654.tif." Typed form on back reads: "Caterpillar Tractor Co. San Leandro, Calif. Rec'd from Budd & Quinn. Their letter: 2/8/28. Date taken. Model Twenty. Owner: Briscoe Ranch. Location of work. Description of work: "Caterpillar" Twenty with new 2-way French plow. Our Negative No. 8058. Form S.L. 511-5M-9-28." Agricultural worker using a Caterpillar 20 tractor to cultivate a grape vineyard , General Subjects Photography Collection, PC-GS-Agriculture-Grapes , California Historical Society, PC-GS_00206