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4 WINES&VINES June 2017 PUBLISHING INFORMATION: Volume 98 Number 6. Wines & Vines, ISSN 043-583X, a member of Wine Communications Group, Sonoma, Calif., is published monthly. Periodicals postage paid at San Rafael and at additional mailing offices. Reproduction in whole or part without permission is prohibited. Wines & Vines does not assume responsibility for unsolicited manuscripts or materials. Contributors are responsible for the proper release of proprietary and/or classified information. Wines & Vines is distributed through an audited circulation. SUBSCRIPTION RATES: U.S., $38; Canada/ Mexico, $48; All other countries, $85 (for airmail add $85). POSTMASTER: Send address changes to: Wines & Vines, PO Box 1649, Boulder, CO 80306-1649. 6 Connect With Us 8 Editor's Letter 65 Advertiser Index METRICS 10 April Sales Growth Steady as Hiring Activity Slows. PRODUCTS 24 News Scope for Inspecting Barrels. 45 Focus Membrane Filtration. NEWS 14 Top Stories North Coast Wine Industry Deals Continue; Is This Napa Winery Trend Stalling? 59 Eastern News Eastern Grapegrow- ing Regions Report Mild Winter—with Exceptions. FACES & FORUMS 66 Wines & Vines Oak Conference. WINEMAKING 32 New Equipment for a Safer, Quicker Crush Wineries invest in the latest equipment for sorting, destemming, pumping, pressing and fermenting. By Andrew Adams 38 Technical Spotlight: Tamber Bey Vineyards Converted horse arena in Napa Valley provides space for 19 custom-crush clients and two climate-controlled barrel rooms. By Andrew Adams GRAPEGROWING 28 Self-Assessment Workbooks: Where Are They Now? It's been 20 years since the first self-assessment workbook for wine grapes was published, and several others have emerged to help growers produce quality fruit more sustainably. By Cliff Ohmart 49 Deficit Irrigation: How Low Can You Go? While water stress can improve grape quality, Washington State University scientists discovered deficit irrigation has its limits. By Melissa Hansen 53 Grapevine Triangle: Understanding Balance Achieving grapevine balance from root to shoot to fruit without negatively affecting next year's crop. By Mike Trought 61 Back to the Future: A Historical Perspective Michigan's northwest and southwest grape industries have shown diver- gent growth. By Josh Vanderweide, Paolo Sabbatini and G. Stanley Howell BUSINESS 30 What Coming Excise Tax Changes Mean Tax changes will alter who is eligible for the small producers' tax credit and have positive results for sparkling houses. By Ann Reynolds 38 45 32