Farms where animals are run intensively often have problems with manure management and these areas are a breeding ground for bacteria. Also, moisture, odors and toxic gases like ammonia are produced.
The characteristics of biochar and having the ability to absorb large amounts of moisture make it ideal as a bedding material. Used in litter, biochar locks in moisture, organic and inorganic nitrogen compounds. The nitrogen adsorption and the continuous drying of the litter deprive the microbial pathogens of their nutrient base and reduce toxic emissions of ammonia. After just a few days, a significant reduction in coop odor can be noticed (ref: Biochar Journal)
This practice has the additional benefit of pre-loading the biochar in the litter making it ideal a nutrient/carbon rich soil supplement after pyrolysis.