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Re: Questions about Soil Amendments

Square Foot Gardening List - http://www.flinet.com/~gallus/sqft.html

I know that wood ash can make alkaline soil more alkaline.  Does anyone
know if any other organic amendments (other than lime) can raise soil
PH.  Since I have alkaline soil I don't want to be making my soil PH
problem any worse.

What about greensand, rock phosphate, alfalfa meal and cottonseed meal,
or any other amendments you can think of.

It seems most people have the other problem, their soil is too acidic. 
I've found that amendment bags don't really tell you what the effect is
on PH.  I know peat moss, pine products and cocoa mulch can help
acidify.  Any thing else?

Kim zone 9b, so cal

 
> No. Greensand adds potassium (which is the K in NPK and the important
> element in potash.)  Rock phospate adds phosphorus, the P in NPK.
 
> Greensand is best added to the soil as a long term slow acting source of K
> and other trace minerals, along with compost and rock phosphate.
> 
> Personally I don't use blood meal and bone meal, preferring compost or
> alfalfa meal as an N source and rock phosphate as a P source if I need one;
> alfalfa meal at 5-1-2 is a balanced fertilizer and compost is also.

> Cottonseed meal is a fertilizer, primarily an N source and useful for acid
> loving plants like blueberries and azaleas. In my opinion, it is worthwhile
> to pay extra for organic cottonseed meal, as the other stuff is laden with
> pesticide residues...
> >
>


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