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Soil has Very high Phosphorous...why?

Posted by topsiebeezelbub z7 Al (My Page) on
Tue, Mar 11, 14 at 9:34

Just got my soil tested and everything was neutral, except phosphorous which was very high. I have been using fresh manure from my pet rabbit. I was under the impression that rabbit manure did not need to be aged like other manure. I was worried about too much Nitrogen, at the expense of flower and fruit production (all leaves) but never even considered phosphorous. Have I messed up the soil? Should I stop using bunny pooh? I have heavy clay and add lots of compost every year...the lot is flat, so no run off. I grow all sorts of flowers and veg. Thanks for any advice.


Follow-Up Postings:

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RE: Soil has Very high Phosphorous...why?

Phosphorus is quite immobile in soil. Along with natural mineral soil contributions, animals (and humans) tend to poop out a lot of it.

That said, even in very high phosphorus soils, toxicity is very rare. You're more likely to see copper and zinc deficiency symptoms on plants because of the increased plant site competition between phosphorus/copper/zinc rather than any actual phosphorus toxicity issues. This is generally only an issue in high pH soils, though, and it's probably not going to be an issue in Alabama.


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RE: Soil has Very high Phosphorous...why?

My backyard tested very high in P too. Several previous owners had big dogs and I assume the back yard was fenced in for them. I have always wondered it that was the connection.


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RE: Soil has Very high Phosphorous...why?

A common source of high Phosphorus in home gardens is repeated additions of manures.


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