Forest Management Plan - Sabah Forestry Department

Table 2.2: Description of soils found within FMU 17ASoil LandformAssociationLokan Very highhillsBidu-BiduDalitMountainsand hillsModeratehillsParentMaterialMudstone/SandstoneUltrabasicIgneous RocksMudstone/SandstoneMentapok Mountains Basic igneousrocksTawaiBinalikPlateau withgentlyundulatingsurfaceValley floorsand terracesIronstone andAlluviumderived fromultrabasicrocksAlluviumderived fromultrabasicrocksMain Soil UnitOrthic AcrisolDystric CambisolRhodic FerralsolOrthic FerralsolEutric Cambisol ChromicLuvisol Orthic LuvisolLithosolOrthic AcrisolGleyic AcrisolChromic Luvisol, OrthicLuvisol, Eutric Cambisol,LithosolDystric Histosol, DystricCambisolOrthic FerralsolGleyic Luvisol,Ferric LuvisolOrthic LuvisolOrthic AcrisolsSoil FamilyTanjong LipatKumansi, LaabPinianakanAmbunBinuangMalawali TingkayuTanjong LipatMasaumBeestonKobovanBombalaiKaintanoMeliauNobusuNangohPantagaluang,NumatoiKataiThe Lokan Association is the most extensive soil (covering about 45% of the totalproject area) particularly at the eastern part of FMU 17A. It occurs in areas of highhills with altitudes up to 300m and slopes sometimes greater than 25 o ; hillcrests areoften very narrow. The hills are formed of interbedded sandstone and mudstone. Themain soil units are Orthic Acrisol of Kumansi and Tanjong Lipat Family and DystricCambisol of Laab Family.Bidu-Bidu Association occurs in the western part of the area with its landform made ofmountains and hills with ultrabasic igneous rocks parent material. Soil units of RhodicFerralsol of Pinianakan Family and Orthic Ferralsol of Ambun Family, Eutric Cambisol ofBinuang Family, Chromic Luvisol of Malawali Family and Orthic Luvisol of Tingkayu Familyand Lithosol are dominant in the association. Soils of this association generally have adark reddish brown color.8