Compost energizes the soil food web, which is made up of microscopic bacteria and fungi, along with earthworms, crickets, and many other life forms. Many fungi form symbiotic, or mutually rewarding, partnerships with plant roots, making it possible for vegetables to feed themselves more efficiently. Research shows that compost enhances the ability of tomatoes and other vegetables to stand up to common diseases and may improve their flavor and nutrition, too. Compost also helps the soil retain moisture. Through composting you enhance your gardenâs ability to grow healthy plants while reducing your volume of trash.