S4 E21 Calcium vs. Limestone on Dollar Spot.

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

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