They can penetrate 1.5 meters into the loam. Broken up and turned over by them, the clay is loosened and softened, allowing it to circulate water and air more easily, and giving the root systems of plants even more room to absorb nutrients and to set themselves in.
它可以鑽入土中達一．五公尺深，土壤受其翻攪，更加鬆軟，提供植物根系更好吸收養分的空間與立足之地。