Assertion: peat's value | /r/HasProperty | gradual but variable reduction
Facets:
value: in sodium
type: OTHER
value: to the base of each seam
type: OTHER
value: from the sub-crop surface
type: LOCATION
Source sentences:
text: The highest values are generally found in the stratigraphically youngest seams and there is a gradual but variable reduction in sodium from the sub-crop surface to the base of each seam.