_:b15633 . _:b15634 . _:b15635 . _:b15635 . _:b15633 . _:b15634 . _:b15633 _:b17771 . . _:b15633 . _:b16288 . _:b16288 _:b17337 . "Guidelines for Soil Description issued by the FAO: table 50"@en . _:b15635 . "StructureSize"@en . _:b17771 _:b16288 . _:b17337 . _:b15634 . . _:b15634 . _:b17337 . _:b15635 .