This article is written to provide a brief overview of S fertilization issues. Sulfur accumulation by the aerial portion of a cross section of crops grown in Oregon is presented in Table 1. The soil will supply S to the crop.
Some conditions exist for the response to be true.
This rate of S application should leave sufficient S in the soil for a crop this season. We have been taught that SO 4 -S is an anion and that it will leach with the high rainfall in western Oregon. The sulfate from the calcium sulfate treatment illustrates sulfate movement occurs but all sulfate is not removed or leached in a two year period. Forage yield in 1978 was not different than annual applications of gypsum. Total dry matter forage yield over a four year period at the Roseburg site as influenced by rate, source and particle size of sulfur applied annually or as a single application .