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Decomposed plant and animal material in soil. Organic matter holds water like a sponge, releases nutrients as it decomposes further, and binds mineral particles into aggregates that improve soil structure. Gardeners increase organic matter by adding compost, aged manure, or leaf mold.
@misc{emsenn2026-organic-matter,
author = {emsenn},
title = {organic matter},
year = {2026},
url = {https://emsenn.net/library/domesticity/domains/gardening/terms/organic-matter/},
publisher = {emsenn.net},
license = {CC BY-SA 4.0}
}