Low soil phosphorus and potassium limit soybean grain yield in Ohio

A soil survey was conducted in Ohio with the following objectives: (i) to assess the status of soil fertility; (ii) to examine soybean grain yield in areas with fertility levels in the build‐up range, where soil test levels were less than the critical level (CL); the maintenance range, where soil test levels were between the CL and maintenance limit (ML); and the drawdown range, where soil test levels were greater than the ML; and (iii) to determine if the soil test and yield data collected support the state‐established fertility recommendations. Earn 0.5 CEUs in Soil & Water Management by reading this article and taking the quiz at www.certifiedcropadviser.org/education/classroom/classes/496 .