People from a farm supply company had a farmer who had corn that appeared to be nutrient deficient in specific patterns across fields. The patterns appeared to be consistent with the GPS map of the fertilizer applications. We walked the fields, I examined the corn for other potential problems, such as restricted roots, weeds, etc., and we pulled plants for tissue analysis. There was one area in one field where weeds were a problem. They had been controlled recently, but had affected the corn crop. I sat with the farmer, the representatives from the farm supply and the farmer to discuss options in season. I made a suggested management plan to overcome the apparent nutrient deficiencies. Three weeks later, I received a report that the corn looked much better. In this visit, I helped fix a problem and maintain a relationship between the farmer and the farm supply company.