Clay soil, on the other hand, is made up of tiny layers that are so closely bound together that either the water cannot penetrate the hard surface, and so runs off, or it soaks in only to get trapped, thereby suffocating the roots of the plants.
Savimuld koosneb aga õhukestest kihtidest, mis on nii tihedalt koos, et vesi ei imbu kõvast pinnasekihist läbi või jääb mulda imbudes mullapooridesse pidama, nii et taimejuured ei saa õhku.