Turns out, farmers now sow fertiliser pods on their lands: callled "controlled release fertilizers" they are tiny versions of your laundry pods but filled with fertiliser.
Seeds are also individually wrapped in a plastic pouch.
The micropouches break down into smaller microplastics that remain in the soil. And as they say, you reap what you sow.
This disturbing report posted by @henkdeligt , run it through a translator if you dare.
https://apache.be/2024/04/03/boeren-zaaien-ook-microplastics
There are a few other pathways for microplastics to reach the soil, from stormwater to plastic sheeting to "biosolids" (which is polite for processed municipal poo and other shit) β and all of those pathways need to be broken.
https://www.sierraclub.org/michigan/blog/2024/02/microplastics-and-agriculture