Assertion: soil's matter | /r/HasProperty | protected
Facets:
Source sentences:
text: Much of the humus in most soils has persisted for more than 100 years, rather than having been decomposed into CO 2 , and can be regarded as stable; this organic matter has been protected from decomposition by microbial or enzyme action because it is hidden (occluded) inside small aggregates of soil particles, or tightly sorbed or complexed to clays.