In what units must phosphorus test results be reported according to Act 38?

Phosphorus test results must be reported in parts per million (ppm P) according to Act 38. This unit is commonly used in soil testing to express nutrient concentrations. Reporting in ppm provides a clear and standardized way to communicate the amount of phosphorus available in the soil, which is crucial for understanding nutrient management practices and making informed decisions on fertilizer application.

The choice of ppm P allows for consistency across various agricultural practices and facilitates better understanding among farmers, agronomists, and regulatory bodies. This unit directly relates to the concentration of phosphorus in the context of soil and allows for practical application in nutrient management planning.

Other units listed, such as mg/L, kg/ha, and g/m², do not align with the specific requirements set by Act 38 for phosphorus reporting. While mg/L is a measure often used in water quality testing, it does not adequately represent soil nutrient analysis. Similarly, kg/ha and g/m² are measures of mass per area, which are not standard for reporting phosphorus concentrations in soil tests under the guidelines specified by the act.