Too much phosphorus in soil - Knowledgebase Question

Riverton, Ne
Question by adair5481
May 4, 2009
I had soil test done, results: Phosphorus value 187.00ppm, potassium 88.00ppm. how do I fix this so I can grow grass and not weeds???


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Answer from NGA
May 4, 2009

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Soils with high levels of phosphorous might make other nutrients unavailable to plants but usually only half of the phosphorus is available to plants and therefore a high number on your soil test does not necessarily indicate a problem. However, fescues and alfalfa can reduce the amount of phosphorous in the soil, as can clover. You might consider growing one of these as a cover crop to help reduce the amount of phosphorous in your soil. Your soil testing lab should also have some suggestions on how best to reduce the amount of phosphorous in your soil.

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