What is the main source of the phosphorus of fertilizers?
A Bi-Monthly Magazine
Borrowing From Yesterday To Do the Work Of Today
Offering Resources to Promote Self-Sufficient & Back-to-the-Land Living
What is the main source of the phosphorus of fertilizers?
I'd guess manure or rock phosphate
Dave
8 years ago via Forums | Front Porch Forum
Phosphate rock.
8 years ago via Forums | Front Porch Forum