In recent years atmospheric sulfur deposition has been dramatically reduced due to reductions in power plant sulfur emissions. The lack of atmospheric deposition has also reduced soil test levels of sulfur. Based on soil test data from B&M Crop Consulting most soil test levels are half the ppm they were in 2005. Many soils now have less than 10 ppm of sulfur. Despite the reductions in deposition and soil test levels, the need for sulfur in a soybean plant has increased as yields have increased. Removal has far exceeded deposition, which has also led to reduced soil test levels and a potential deficiency in the plant. Sulfur fertilizer may now be needed for soybeans to make up the difference...