S4 E21 Calcium vs. Limestone on Dollar Spot.

About this episode

This episode discusses the effects of calcium and nitrogen on dollar spot disease in creeping bentgrass.

In this video, I break down the study “Influence of Calcium and Nitrogen Fertilizer on Creeping Bentgrass Infected with Dollar Spot.” We examine whether it is calcium or lime that actually suppresses dollar spot, how it compares to nitrogen, and what happens when the two are applied together. The results show that both calcium and nitrogen reduced disease individually, but combining them was less effective due to antagonism, with calcium also improving root growth and stress tolerance rather than directly controlling disease. Unfortunately, the authors do not discuss the influence of lime rather than the calcium. This mistake greatly reduces our confidence in the results. If you're interested in dollar spot management, calcium fertility, nitrogen effects, and turfgrass disease control, this is a must-watch breakdown. #turfgrass #dollarspot #soilscience #calcium #fertilizer #golfcoursemanagement #turfgrassscience Become a member of Turfgrass Epistemology and support turfgrass research:www.youtube.com/@TurfgrassEpistemology/join Voicemail:859-444-4234 Apple Podcasthttps://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Spotify…

People in this episode

Host: Travis Shaddox

Topics covered

• dollar spot management
• calcium fertility
• nitrogen effects
• turfgrass disease control
• soil science

Keywords

• calcium
• limestone
• dollar spot
• nitrogen
• turfgrass
• fertilizer
• golf course management

Mentioned in this episode

Organizations: Turfgrass Epistemology

Books & works: Influence of Calcium and Nitrogen Fertilizer on Creeping Bentgrass Infected with Dollar Spot

More episodes of Turfgrass Epistemology

• S4 E30 Does Manganese Influence Take-All Disease? · May 28, 2026 · 1h 12m
• S4 E29 Can Silicon Reduce Turfgrass Disease? · May 7, 2026 · 1h 2m
• S4 E28 Does Biological Disease Control Work on Turfgrasses? · May 5, 2026 · 59 min
• S4 E27 Tinfoil Turfgrass - 35 Years of Experience. 35 Years of Bullsh*t. · April 30, 2026 · 1h 37m
• S4 E26 Tinfoil Turfgrass - How to With Steve and BS Booster! · April 28, 2026 · 1h 13m
• S4 E25 Tinfoil Turfgrass - More soil testing nonsense from Steve. · April 23, 2026 · 1h 41m