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quotes from where to buy green sand thread in Organic forum:
Quoted:
sallyg,clump cat litter,is, colloidal phosphate,is the clay washed out from between the layers of rock phosphate as the phosphate is mined .it has a lower total phosphate content than rock phosphate, but more of the phosphate is in available form. composition: contains about 16 %total phosphate ; about 2% in available form.benifits/uses:to build up the phosphate levels of your soil; very slowly available.application:broadcast 50 lbs. per 1000 sq. ft.over the entire garden every five years to maintain phosphate reserves.it is best apply in the fall to maximize phosphate release by soil organisms. this comes from Rodales chemical free Yard & garden book..hope this helps
I have about 15 000 square feet of total yard area. That means I could theoretically spread 15 times 10 pounds of litter a year, 150 pounds..I'm considering adding the pee balls to the compostable material. Any thoughts?
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