.Applying compost/aged manure- nitrogen, carbon, moisture, soil biota (bacteria/fungi), general (structure/nutrients) – Compost is an all around great soil amendment. It is decomposed plant and animal materials that have reached a more stable form. Compost adds carbon to the soil to help feed soil life while introducing living microbes of its own. Your soil sample can also help you get an idea of what your current levels of organic matter are. Compost provides a useful place to dispose of yard waste and food scraps while creating an extremely valuable resource.