"BiologicalAbundance"@en . _:b15536 . _:b15535 . _:b16256 . _:b15535 . _:b16256 _:b17305 . _:b15535 _:b17739 . _:b17739 _:b16256 . "Guidelines for Soil Description issued by the FAO: table 81"@en . _:b17305 . . _:b15536 . _:b15535 . _:b17305 . _:b15537 . _:b15537 . . _:b15537 . _:b15536 . _:b15537 . _:b15536 .