_:b12017 _:b12022 . _:b12022 . _:b12020 . _:b12020 . "Guidelines for Soil Description issued by the FAO: table 4"@en . "MajorLandForm"@en . _:b12022 . _:b12024 . _:b12025 . _:b12025 . . _:b12020 _:b12021 . _:b12024 . _:b12024 . _:b12025 . _:b12024 . _:b12021 _:b12017 . _:b12017 . . _:b12025 . _:b12020 .