What Are These Been Killing My Grass For Last Two Years

Question

Little Green pelets

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Answer 1

Those look like fertilizer pellets. If you or someone nearby is putting this out, then it could be too much. You can test for nutrient or pH issues:

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm