Soil is more than the dirt beneath our feet. Soil is rich in biodiversity. According to Kathy Merrifield, a nematologist from Oregon State University, “one teaspoon can hold up to one billion bacteria, several yards of fungal filaments, several thousand protozoa, and scores of nematodes.” Unfortunately, soil is eroding at unprecedented rates. Professor John Crawford of the University of Sydney warns that “a rough calculation of current rates of soil degradation suggests we have about 60 years of topsoil left.”
But cover crops can help protect soil and prevent degradation.
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