{"podcast":{"title":"Vineyard Underground","slug":"vineyard-underground-6280933","podcast_index_feed_id":6280933,"rss_url":"https://f364ccd0-b8ab-4504-aea4-3e21b899bc22.libsyn.com/rss","website_url":"https://www.vineyardundergroundpodcast.com/","image_url":"https://static.libsyn.com/p/assets/a/b/3/9/ab390a1f09536c4d27a2322813b393ee/Final_Vineyard_underground_1.jpg","author":"Fritz Westover","episode_count":100,"summary":"What if you could hang out with experienced grape growers, ask them about the science of grape growing, vineyard operations, and more; then take an insight or two to improve your vineyard and ultimately the quality of the wines you produce? That's what we do each week on the Vineyard Underground. Hosted by Fritz Westover –– viticulture expert more than 20 years of experience in the vineyard industry –– every episode is an in-depth look at grape growing methods, care, and even complicated matters of fertilization and pest and disease management? The goal is to provide you with an understanding of the complicated aspects of viticulture science so that experienced and even first-time grape growers will be able to understand and implement new practices in their vineyard.","last_synced_at":"2026-06-09T18:17:07.711312+00:00","page_url":"https://stenobird.com/podcast/vineyard-underground-6280933"},"episode":{"title":"094: Vineyard Nutrition Essentials - Magnesium Fundamentals with Dr. Jaclyn Fiola","slug":"094-vineyard-nutrition-essentials-magnesium-fundamentals-with-dr-jaclyn-fiola","published_at":"2026-03-31T08:00:00+00:00","page_url":"https://stenobird.com/podcast/vineyard-underground-6280933/094-vineyard-nutrition-essentials-magnesium-fundamentals-with-dr-jaclyn-fiola","show_page_url":"https://stenobird.com/podcast/vineyard-underground-6280933","url":"https://f364ccd0-b8ab-4504-aea4-3e21b899bc22.libsyn.com/094-vineyard-nutrition-essentials-magnesium-fundamentals-with-dr-jaclyn-fiola","audio_url":"https://traffic.libsyn.com/secure/f364ccd0-b8ab-4504-aea4-3e21b899bc22/VU_Ep094_Master.mp3?dest-id=3650511","summary":"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 testing to avoid mismanagement. Listen now to learn the important role of magnesium in your vineyard. In this episode, you will hear: Magnesium as a core component of chlorophyll and photosynthesis Soil pH, texture, and moisture driving nutrient availability Competition between magnesium, potassium, and calcium Late-season deficiency symptoms and how to recognize them Importance of tissue testing for accurate diagnosis Pre-plant and in-season magnesium correction strategies Follow and Review: If you enjoyed this episode, be sure to follow the podcast and leave a 5-star review on Apple Podcasts…","meta_description":"In this final installment of the Vineyard Nutrition Essentials series, Fritz is joined by Dr. Jaclyn Fiola, Assistant Professor of Soil and Environmental…","key_points":[],"chapters":[],"topics":[],"duration_seconds":2735,"processing_state":"not_requested","actions":[{"name":"request_transcript","method":"POST","url":"https://stenobird.com/v1/public/podcasts/vineyard-underground-6280933/episodes/094-vineyard-nutrition-essentials-magnesium-fundamentals-with-dr-jaclyn-fiola/transcription-requests","description":"Idempotently request low-priority transcript generation for this episode."},{"name":"read_markdown","method":"GET","url":"https://stenobird.com/podcast/vineyard-underground-6280933/094-vineyard-nutrition-essentials-magnesium-fundamentals-with-dr-jaclyn-fiola.md","description":"Read the agent-friendly Markdown representation of this episode resource."}]}}