Which of the following statements is true about sulfur in Kentucky soils?

In Kentucky soils, sulfur plays an important role in plant nutrition and is available in various forms. One of the true statements includes that our soils receive about 10 to 15 pounds/acre of sulfur through rainfall annually. This natural deposition occurs as sulfur oxides from the atmosphere convert to sulfate during precipitation, contributing to the overall sulfur availability in the soil.

Soil tests for sulfur have improved significantly over time, enabling more accurate assessments of sulfur levels. This accuracy is particularly beneficial for optimizing sulfur fertilization, as sulfur can be limiting in certain soils and crops.

Regarding the uptake mechanism, sulfur is primarily taken up by plants in its sulfate form (SO4^2-), which is not a divalent cation. However, the term "divalent cation" usually refers to positively charged ions with a +2 charge, such as calcium and magnesium, which is not the case for sulfur.

The combination of correct facts regarding sulfur receipt in rainfall and improved testing underscores the importance of sulfur management in agriculture, especially in areas like Kentucky where its deficiency can impact crop yield. Thus, the statement that encompasses all aspects about sulfur in Kentucky soils holds true, affirming the comprehensive understanding needed for effective soil and crop management in the region.