Across Iowa, fertilizer and soil amendments are prescribed according to recommendations developed by Iowa State University research and are based on the results of soil samples tested by labs certified to operate in the state. The integrity of nutrient management is based on the accurate analysis of soil pH, buffer pH, phosphorus and potassium that are used to generate these recommendations.
In the interest of encouraging greater nutrient management and the use of soil testing the Iowa Nutrient Research & Education Council (Iowa-NREC) has created the Iowa Soil Laboratory Performance Program (ISLPP) to evaluate and document the performance of these tests by the labs:
Iowa Nutrient Research & Education Council (Iowa-NREC) https://www.iowanrec.org/
Enrollment / Program Costs:
ALP-Enrolled Labs: $1,800 per year
Non-ALP Labs: $2,200 per year