Assertion: peat's composition | /r/HasProperty | involved
Facets:
value: undoubtedly
type: DEGREE
Source sentences:
text: Soundings show the following cross section: 0-22 inches: the upper portion of the layer represents a thin cover of moss peat imbedded in closely matted roots of the growing grasses, sedges, and herbaceous plants which merge into brown fibrous sedge peat; the lower portion contains the woody shoots and roots from adjacent heaths, some of the roots extend as much as 18 inches below the surface; the extent and character of roots and the marked development of herbaceous plants are probably due to favorable aeration, although the medium acid reaction (pH 5.5) and composition of the ground water are, undoubtedly, also involved; below the 18-inch level the material consists of brown fibrous sedge peat which is very compact and slightly sandy at the lower level.