Soil and Decomposition

Illustrates how food for plants is made by natural methods is a forest, and by man on an organic farm. Laboratory experiments, microscopic and time-lapse photography show the process of decomposition of dead leaves into fertilizer; describes how the combined action of insects, bacteria, and molds consumes carbohydrates and proteins, replacing them with ammonia and finally, through biological action, inorganic ammonium-nitrogen which provides the nutrients for plant life.