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Soil Contamination

Q.Reducing Sulfur In Soil

Zone 33558 | Anonymous added on August 14, 2021 | Answered

I had a soil test done by a university that listed the following Phosphorus (P) 55 High, Potassium (K) 55 Medium, Magnesium (Mg) 131 High and there recommendations is to add 2.00 per 1000 of Nitrogen and 1.5 per 1000 Potassium. However, the sulfur is currently 40.7 mg/kg or ppm and adding potassium will in increase the sulfur content correct? How can I lower the sulfur to the recommended mg/kg or ppm of 6.0? and still correct the Phosphorus and Magnesium? The area is my front yard where recently the grass as died, it was sprayed with Eagle EW20 for a fungicide and treated for pest with no results then a broad spectrum fungicide was added 2 weeks later. So I removed the dead grass and want to bring the PH and sulfur under control before a plant new sod. Thank you

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Certified GKH Gardening Expert
Answered on August 30, 2021

It sounds like a sulfur reducing bacteria has taken over your lawn. This is going to be a tedious process to bring it back to a usable state. I would have that same university test for what bacteria is causing the issue. You may need to kill this off before the sulfur can be flushed out of the soil. Likely, after killing the bacteria, you can use citric acid to remove excess mineral content from the soil, as well as flushing with large amounts of water, after.

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