Phosphorus, Your Fields and Pastures, and Water Quality Protection

Phosphorus is an essential nutrient for plants and all animals. It's literally in the DNA of everything and everyone. It's in the top 20 most abundant elements in our solar system, and the 11th most

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2 thoughts on “Phosphorus, Your Fields and Pastures, and Water Quality Protection

  1. I agree with Gene. Cows depositing manure in a natural way during grazing is much different than any man devised system. Hay fields while better than corn, are also unnatural as in nature they were grazed.

    Ultra High Density Grazing (UHDG) is proving to be very efficient in returning all nutrients to the soil where needed and runoff is very low.

    The solution for corn fields is cover crops and much better if they are then grazed. The theory for cover crops came from grasslands where there is cover all year and live roots in the soil all year. Even when the plant is dormant, live roots are contributing.

    Nature had it all figured out. Understanding and using nature solves most problems.

  2. Wisconsin has developed a Phosphorous Index (PI) it is combination of soil loss and P attached to soil. We can have high P soils but if erosion (soil loss) is very low. P leaving the farm is also low. We can also have very low testing P soils but with high levels of soil loss and generate high PI.

    Erosion is the main issue as well as timing of manure applications. Interestingly Wisconsin research on well managed pastures demonstrates extremely low N and P losses from the system. All manure is not created equal, mechanically applied manure does not behave the same as animal deposited manure. It is very difficult to lose animal applied manure, it has structure and adheres to the forage underneath.

    Hayfields are very different than a pasture.

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