original: The organic matter in soil derives from plants and animals.
simplifications: The organic matter in soil comes from plants and animals. The natural matter in soil comes from plants and animals. The organic matter in soil comes from plants and animals. The organic matter in dirt comes from plants and animals. The organic matter in soil comes from plants and animals. Organic matter in soil comes from plants and animals. The organic matter in soil comes from plants and animals. The organic matter in soil is gotten from plants and animals. The organic matter in soil comes from plants and animals. The organic matter in soil gotten from plants and animals.