Assertion: soil's amount | /r/HasProperty | left on the surface of the soil
Facets:
value: during the year
type: TEMPORAL
Source sentences:
text: Crop rotations  for row crops alternate high-residue crops with lower-residue crops to increase the amount of plant material left on the surface of the soil during the year to protect the soil from erosion.
text: for row crops alternate high-residue crops with lower-residue crops to increase the amount of plant material left on the surface of the soil during the year to protect the soil from erosion.