|Author and editor Dr. Glenn McGourty|
The book has extensive coverage of all aspects of organic viticulture and was written for California growers.
Today only about 2% of California's 500,000 acres of vineyards are certified organic, although about another 2-5% may also be practicing organic.
In contrast, France has 10 times the certified organic acreage that California does, with 7% of its vineyards organically certified, and a different wine culture with consumers seeking out these wines. Wine lists in restaurants often list organic and/or biodynamic wine options.
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For more details about the manual, you can visit Wines and Vines to see their coverage.