u/Maleficent_Nerve_635

I have not been able to find an answer, but I have grey spots on soil composition map. It does't seem to have any effect on yield, but I can not figure out what is causing it or how to make it go away?

I have tried planting over, plowing, creating new fields with a plow over, etc. Nothing seems to make it go away. Any insights?

https://preview.redd.it/a1ifq7vxe5yg1.jpg?width=6048&format=pjpg&auto=webp&s=b89ff5b5912e898c6a5802434a1e65c7bba7d517