Solum makes a field-deployable measurement tool that can give farmers immediate results of soil nutrient needs. Solum enables farmers to reduce fertilizer costs and improve crop yields by delivering the right amount of fertilizer at the right place and at the right time. Solum technology makes farming more sustainable by reducing nitrogen runoff (which causes aquatic dead zones) and combating a significant source of nitrous oxide the third most important greenhouse gas and the leading cause of ozone depletion.