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Phosphorous/Potassium application rates

Phosphorous/Potassium application rates
Posted by Donnabella from Western Austral on 2008-06-19 06:35:00

I know my vegie garden soil is deficient in phosphorous and potassium, but can anyone tell me how often I should apply these two nutrients in the forms of ground rock phosphate and greensand or even just soluble fertilisers?
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