. _:b15737 . _:b17368 . _:b15736 . _:b15738 . _:b16319 . _:b15737 . _:b15736 _:b17802 . _:b15736 . _:b15737 . _:b15736 . _:b15738 . _:b15737 . _:b15738 . _:b16319 _:b17368 . _:b17368 . . _:b15738 . _:b17802 _:b16319 . "GypsumContent"@en . "Guidelines for Soil Description issued by the FAO: table 40"@en .