IATE: 
lichte zavel (lemig zand, leemzand, lemige zandgrond, siltig zand, kleiig zand)
=
loamy sand
loamy sand soil

zware zavel (zandige lichte klei) =
sandy clay loam

(https://iate.europa.eu/search/result/1701281353597/1)

Dutch

  • zavel

English

  • coarse sand (GWIT)
  • sandy clay (Van Dale)
  • sand (finely ground rock)[1]
  • (chiefly Southern) sand (Wiktionary)
  • soil consisting mostly of sand with significant to high levels of clay (Wiktionary)
  • sandy clay [Dutch source term: zavel]

Van Dale

References