The use of best management practices and technology might allow some fields in NC to yield 70 bu/A or more, defined as high-yielding soybeans. Although soil test phosphorus (P) and potassium (K) levels have been recently confirmed as sufficient, it is unclear if these levels are sufficient for high-yielding soybeans. Recalibration of soil test P and K for high-yielding soybeans is the objective of this research, which will occur at four farmer field sites that routinely harvest > 70 bu/ac soybeans. We will measure the plant tissue-P and -K, and yield during two cropping years. The results will be compared with those coming from three long-term P and K experiments conducted in different regions of North Carolina, in which the yield expectations are close to the average for the state. We ask that the NC Soybean Producers’ Association support the costs of a part-time undergraduate student, field supplies, travel costs, and, soil and plant analysis. Results from this project will be used to help determine the necessity of modifications in P and K recommendations for high-yielding soybeans in North Carolina.