The Yucca schidigera plant can be found only throughout the Southwestern United States and in the central Baja California desert, where it is more abundant. The Yucca schidigera plant was widely used by Native Americans of these regions for food purposes. All parts of the plant were used, including: the fruit, seeds, seed pods, flower petals, roots and leaves. Out of the Yucca schidigera plant also came herbal teas and fermented beverages, and remedies.
Today the Yucca schidigera plant is still being as an ingredient for poultry, swine, equine, bovine and pet feeds. It is employed as a organic liquid fertilizer, soil conditioner and plant growth enhancer in agriculture, and is also utilized in the production of grain conditioner surfactant. It is also used commercially as a foaming agent in root beer, alcoholic beer, shampoos, detergents and as a food supplement for humans
The Yucca schidigera extract when added to animal feed has been shown to lower noxious ammonia gases in animal wastes, dramatically curbing dangerous and foul odors. The extract has also been found to increase animal performance by lowering ruminal, intestinal and blood ammonia levels, which result in poor performance.
yucca.com.mx/boletinen.html
maybe after digging them all out you can grind them up dry them then spread it around?
I just bought some for my dogs and it really worked in the past for their gas lol