Considering the nutrient cycling in a terrestrial ecosystem, plant-soil feedback (PSF) determines the structure of plant community. Moreover, the functional diversity of microbe affects the plant community. The microbial diversity allows to reverse the sign of PSF from positive to negative, so that microbial community facilitates plant coexistence. There is another factor that affects the face of nutrient cycling, that is the waste of herbivore and consumer. Feces are readily decomposed than litter, and it should affect microbial community. We construct a simple model including the waste decomposition. The result shows that feces can facilitate the microbial coexistence if they provide a resource of the different nature from plant litter to microbes.