Considering its critical importance to tree care, it is no surprise that tree care professionals have increased understanding of the living soil. This includes a myriad of soil life that supports a healthy tree, including microscopic beneficial bacteria, fungi, protozoa, nematodes, and a wide variety of soil arthropods and worms. Their numbers in healthy soils are nothing less than staggering. A teaspoon of forest soil can contain miles of fungal filaments and several billion bacteria.
