Potassium (K) and magnesium (Mg) deficiency are common stresses that can impact on grape yield and quality. but their effects on photosynthesis have received little attention. Understanding the diffusional and biochemical limitations to photosynthetic constraints will help to guide improvements in cultural practices. Accordingly. https://www.roneverhart.com/Aftermath-Cabernet-Sauvignon-Napa-Valley-2017/