Acidification of slurry with sulfuric acid is a recent agricultural practice that may serve a double purpose: reducing ammonia emission and ensuring crop sulfur sufficiency. In this study they investigated sulfur transformations in untreated and acidified pig slurry stored for up to 11 mo at 2, 10, or 20°C. Furthermore, the fertilizer efficiency of sulfuric acid in acidified slurry was also  investigated.

For more information the full article can be found at https://www.agronomy.org/publications/jeq