Technical Report

 

Some Viticultural Limitations in some of Oregon Viticulture: An Integrated Approach to their Local Identification and Viticulture Management Responses to Them Public Deposited

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https://ir.library.oregonstate.edu/concern/technical_reports/qz20t0417

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  • This presentation and the 1986 visit to Oregon were by invitation from Oregon State University and the Wine Advisory Board, and supported by the Sokol Foundation. The ideal cooperation of Professor Porter Lombard and Mr. Steve Price is most gratefully acknowledged. We were in a learning experience, and humble in the complexities of grapevine growth and fruiting. My very limited experience in the viticulture of your region includes, in 1950, a sabbatic leave of six months for grape research with Dr. Walter Clore in Prosser, Washington. I've been involved in the cool climate viticulture of New York since 1944. This paper will emphasize the integrative nature of these three groups of elements in the soiI-canopy-grape complex: 1. Site, soil, and vineyard characteristics with those of; 2. Vine, rooting, and canopy with; 3. Grape composition and grape yield. That integrative nature affords the opportunity to examine some elements of each of these three, as they may limit the attainment of the goals of grape composition and yield. As a part of a specific vineyard, one can examine those elements by description and diagnosis, then select the practice(s) to reduce the limitation. That approach, containing very much that is routine with good management, emphasizes both a systematic approach to the above three groups of elements and an orientation to limitations rather than to practices. For example, Table 1 shows, for one Concord vineyard, the integration of top soil depth with the amount of nitrogen, and of available water, with vine size which affects the yield for balance-pruned vines.
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