Advances in corn product genetics combined with changes in agronomic practices have resulted in substantial increases in corn yields over the past century. 

​Sulfur is an essential nutrient that is required for plant growth. The need for additional sulfur in crop production has increased over the past 30 years. Yellowing of plants, slow plant growth, and delayed maturity are signs of sulfur deficiency. Tissue sampling should be done to assess the need for added sulfur.