Why Do Phosphorus Levels Rise in Manured Fields?

With the latest revision to Manitoba’s manure regulations, manure application is restricted on fields with high soil test phosphorus.  If a field regularly receives manure on a nitrogen basis, the soil test phosphorus levels will rise. N:P2O5 Ratios The biggest factor in rising soil test phosphorus is the N:P2O5 ratio of the manure versus the [...]