Horse manure as a fertilizer

Thu Oct 5 19:48:19 EDT 2000


Is it necessary to add rock dusts to compost to insure adequate P and K  in 
clay soils?  We have assumed, and our soil tests indicate, that P and K are 
there in sufficient supply since ours is clayey glacial till.  So we just 
work on getting a good green and brown balance in the compost to break down 
to nice tilthy texture.  Are we missing something here that doesn't show up 
on lab soil tests?

Bob Gregson
Island Meadow Farm
Vashon Island, WA

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