Armstrong Research and Demonstration Farm
Factors influencing berry properties of grapes are numerous and include environmental factors, management practices, and cultivar differences. Vintners are continually seeking ways to modify these variables to optimize harvest dates and ensure superior fruit quality. The most widely accepted and commonly used measures of berry maturity include pH,soluble solids concentration (SSC), and titratable acidity.
Iowa State University
Wasko, Lisa Marie; Nonnecke, Gail R.; and Domoto, Paul A., "Influence of Vineyard Management Practices and Cultivar on Grape Berry Properties" (2007). Iowa State Research Farm Progress Reports. 867.