"Potassium is the least costly to produce, as all it takes is potash (KCl) from surface or underground mines. **Phosphatic fertilizers begin with the excavation of phosphates, followed by their processing to yield synthetic superphosphate compounds**." ([Location 1120](https://readwise.io/to_kindle?action=open&asin=B08SGC3TD3&location=1120)) --- **Tags** -- [[quotes]], [[fertilisers]], [[phosphate-fertilisers]], **Source** -- [[202412030828 - B - How the World Really Works]]