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WineEast increased in some vine size and soil texture combinations in one season. Vintage and wine age had greater impacts on wine sensory attributes than vine size or soil texture. From 2005 to 2007, 10 Riesling vineyards with heterogeneous soil types were selected from throughout the Niagara Peninsula to test if soil and vine water status were important determinants of terroir, particularly monoterpene concentration and wine sensory attributes. The objectives of the project were: 1) to ascertain the impact of vine and soil water status on FVT/PVT and wine sensory attributes; 2) to enumerate the comparative magnitude of effects of soil texture, water status and vine vigor, and 3) to elucidate re- lationships between these variables and wine sensory quality. GIS-generated maps were analyzed by spatial correlation analysis. In some instances, FVT/PVT were cor- related with leaf water potential and/or soil moisture, suggesting that mild water stress may be beneficial for wine flavor. Sand and clay content of the soils were usually inversely correlated. Soil moisture content was usually higher in clay-dominated areas of the vineyards. Vine water status (leaf water potential) was higher in clay soils. Leaf water potential was often inversely correlated with vine size (i.e., vine water status was improved in low vine size areas). Berry weight and Brix were both positively correlated with vine water status, while TA was inversely correlated. Spatial relation- ships in vine water status appeared to be temporally stable, and patterns observed in 2005 appeared similar during 2006 and 2007, despite different weather conditions. In addition to these reasonably good spatial correlations between soil moisture and leaf water potential, there were strong spatial relationships between leaf water potential and both vine size and soil texture. These observations suggest indirectly that vine size and soil texture, in addition to water status, are major contributors to the terroir effect. Wines from the 2005 and 2006 vintages were subjected to descriptive sensory analysis. Partial least squares analy- sis showed that the greatest percentage of sensory attributes were associated with leaf water potential, soil moisture and vine size. Reynolds, A.G.; de Savigny, C.; and Willwerth, J.J., Progres Agricolet Viticole 127(10):212-222. Contact address of Wines & Vines MARCH 2011 49 "Paper or Plantra" The choice is yours! ® Paper Tube or "GROW" the whole vine! Paper Tube vs. Temporary (single-season?) spray cover, shorter height means more vine training trips. Opaque sidewall construction blocks sunlight vines need to optimize healthy, balanced growth. Plantra JumpStart® Grow Tubes Multi-season field life, spray protection, full tube height for one-trip vine training. Twin-walled for light diffusion and translucent to the specific sunlight vines need, JumpStart® Grow Tubes are packed with advanced greenhouse technology to stimulate the vine's own phytochrome to grow the whole vine from roots to shoots. Bigger, healthier vines for earlier, larger, and sustained harvests. Take the Plantra pledge and "Plant Like You Mean It!" Visit Plantra.com today to discover the impact phytochrome with JumpStart® Grow Tubes can have to get your next planting to Survive, Thrive, Succeed! Vance_Jan11.qxp 11/23/10 9:29 AM Page 1 www.plantra.com 800-951-3806 ©2011 Plantra, Inc.