094: Vineyard Nutrition Essentials - Magnesium Fundamentals with Dr. Jaclyn Fiola

About this episode

Fritz Westover discusses the critical role of magnesium in vineyard health with Dr. Jaclyn Fiola.

In this final installment of the Vineyard Nutrition Essentials series, Fritz is joined by Dr. Jaclyn Fiola, Assistant Professor of Soil and Environmental Science at Delaware Valley University, to unpack the critical role magnesium plays in vineyard health and productivity. Building on prior discussions around potassium, the conversation explores how magnesium functions as a key macronutrient, particularly as the central component of chlorophyll and a driver of photosynthesis and energy transfer in grapevines. Dr. Fiola explains that magnesium primarily originates from soil minerals, especially in darker, magnesium-rich parent materials, and that soil characteristics such as pH, texture, moisture, and cation exchange capacity influence its availability. There is a delicate balance between magnesium, potassium, and calcium, and nutrient competition can lead to deficiencies even when soil levels appear adequate. Listeners will learn how to identify magnesium deficiency symptoms, including interveinal chlorosis in older leaves, and why these symptoms typically emerge later in the growing season. The episode also underscores the importance of accurate diagnosis through soil and tissue…

People in this episode

Host: Fritz Westover

Guest: Dr. Jaclyn Fiola

Topics covered

• vineyard health
• magnesium
• nutrient availability
• photosynthesis
• soil characteristics
• deficiency symptoms

Keywords

• magnesium
• vineyard nutrition
• chlorophyll
• photosynthesis
• soil minerals
• nutrient competition
• deficiency symptoms

Mentioned in this episode

Organizations: Delaware Valley University

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