Parker Cohn works on more than just golf courses. The young soil services entrepreneur and operator of Performance Resources Management is an example of a company offering bespoke — that is, customized to individual fields and operations — fertility recommendations for agricultural and horticultural operations in California. Parker’s customer base and operations are out on the coast, where water pressure on the agriculture sector is tightening amid persistently drier conditions. If you’re a grower in Illinois or Iowa, plane fare is part of what you’d pay for to get Parker’s professional opinion.