Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Mill Network at Kinderdijk-Elshout' has mentioned 'Soil' in the following places:
Occurrence Sentence Text Source
However, the drained soil continued to subside, while the level of the river rose due to the river's sand deposits.
It was decided to build a series of windmills, with a limited capacity to bridge water level differences, but just able to pump water into a reservoir at an intermediate level between the soil in the polder and the river.