The tropical forest is constantly self mulching. After a walk in the woods I usually return with bits of leaves and twigs caught in my hair. Lying in bed at night, my partner and I often hear branches and even whole trees tumbling toward the great soil food web below. This self mulching is one important piece in the self-renewing fertility cycle of the tropical forest. And of all the functions of the forest that we can seek to mimic, generating and applying our own mulch may be the most important.