定義： organic particles in soil or water, usually defined by size class, (eg: up to 2mm in soil, or 1mm at sea) which may include detritus, as well as living particles such as microbes or pollen
定義： organic particles in soil or water, usually defined by size class, (eg: up to 2mm in soil, or 1mm at sea) which may include detritus, as well as living particles such as microbes or pollen
