Reasons to fertilize your crop may range from indications that the plant is deficient, you want yield or quality that you once had, or you want performance that other areas in the field have, says an Oregon State University agronomist. But when making nutrient management changes, grape and tree fruit growers should always confer with those who deal with the end product, be it the winemaker or packer. It can be difficult to distinguish nutrient deficiencies when looking at plants, said Don Horneck, extension agronomist from OSU’s Hermiston Agricultural Research and Extension Center. “Deficiencies can be tough to diagnosis, because […]