By Dusty Sonnenberg, CCA, Ohio Field Leader: a project of the Ohio Soybean Council and soybean checkoff An important part of crop production with environmental stewardship is efficient fertilizer application. The 4Rs are a consideration that can partly be addressed by adding fertilizer to the planter. Selecting the right source, the right rate, the right time, and the right place all come into play with the planter. • The right source: making at fertilizer application at the time of planting can utilize various fertilizer sources, and can be managed by adding either a liquid or dry fertilizer system. • The right rate: the fertilizer rate can be variably applied with new technologies that are available on planters.