Chapter 5 Summary

There exists a reciprocal and symbiotic relationship between the earth’s soil and earth’s life forms. The decay of all forms of matter continually contributes to soil production. Simultaneously, living organisms use the soil and the substance therein to perpetuate their lives. Moreover, a typical acre of soil contains thousands of pounds of life forms such as bacteria, fungi, and algae. These organisms are largely responsible for generating the decay of “animal and plant residues” in the soil. They are also credited with modifying nitrogen for absorption by plants and for the oxidation and reduction processes in minerals that are used by plants.

Often, soil contains incredible numbers of mites and “wingless...

(The entire section is 941 words.)