According to Act 38, which test must be used for phosphorus in soil samples?

Mehlich-3 is the recommended test for phosphorus in soil samples according to Act 38 in Pennsylvania. This test is specifically designed to extract phosphorus alongside several other essential nutrients from the soil, providing a more comprehensive assessment of nutrient availability. The Mehlich-3 extraction solution is effective in a wide range of soil types and pH levels, making it suitable for diverse agricultural settings.

Additionally, the Mehlich-3 test provides better accuracy for determining plant-available phosphorus compared to other tests, aligning well with the state's goal to manage nutrients effectively and sustainably. Understanding the significance of using Mehlich-3 helps ensure that nutrient management practices are based on reliable data, which ultimately supports better crop production and environmental protection.