Question 3: The 30 year contract is nearing the end. The farmer, Jim Shortz, had applied 100 tons (approximately 3 inches) of biosolids on top of the soil annually over the past 30 years. The organic matter content of this layer is greater than 25%. As compared to the soil adjacent to his farm where no application occurred, which horizon might now be present in Jim’s soil following biosolids application?
To review this concept click on the links: Soil Genesis and Development Lesson 4.3
Looks Good! Given the fact that the horizon contains greater than 25% organic matter, this horizon would be considered an O horizon.