A new look at calculating calcium requirements

We are continuing our efforts to refine the new Minimum Levels for Sustainable Nutrition (MLSN) guidelines in cooperation with Dr. Micah Woods at the Asian Turfgrass Center. In the process, we have received some questions about managing sodium.

The MLSN guideline identifies 110 ppm (milligrams/kilogram, mg/kg) sodium as the maximum threshold for cool season grasses. To maintain sodium below 110 ppm in the soil, supplemental calcium is sometimes needed. To determine how much calcium needs to be applied to reduce…