POTENSI TANAH BERBAHAN INDUK HARSBURGIT UNTUK PENGEMBANGAN KELAPA SAWIT DI KECAMATAN LANGGIKIMA, KONAWE UTARA, SULAWESI TENGGARA

Abstract This research aim to determine soil formation factor role, soil formation type, soil characteristic, soil classification, and level of land suitability for oil palm (Elaeis gueneensis) in Kecamatan Langgikima. To fulfill purpose of the is done research with survey method covering thematic cartography, work map, identification of bedrock, soil boring, profiling, profile observation, soil sampling and rock. Profillingbased on sequent topography, bedrock type, and physiography variance. Data required covers soil morphology, physical property, chemistry, and soil mineralogy and bedrock. Result of research indicates that topography diversity factor (toposequent) so central controls soil formation above harzburgite bedrock. At sequent of summit with slope 0-8% points the forming of mature or young soilat sequent of upper and middle slope with slope> 25% points the forming of soil having skin-deep as new soil characteristicgrowed compared to soil at sequent summ1tand at sequent of dip slope and footslope points the forming of senile soil or old soil. Soil formation processes taking place at summit sequent is eluviation, illuviation, desilication (ferritization), transformation, and synthesisant sequent of upper and middle slope is surface erosion, desilication (ferritization), transformation, and synthesisand at sequent of dip slope and footslope is eluviation, illuviation, desilication (ferritization), transformation, synthesis, and leaching (depletion). Arising soil characteristic formed above harzburgite bedrock is soil color of very dark reddish brown until reddish brown, high content free iron oxide and clay mineral goethite ang magnetite. Soil formed above harzburgite bedrock at summit sequent classified as soil family Oxic Haplustepts, Clayey, Paraseskuik, Nonacidat sequent upper slope classified as soil family Lithic Ustorthents, Clayey, Paraseskuik, Nonacidand sequent of middle slope classified as soil family Lithic Ustorthents, Loamly, Paraseskuik, Nonacidat dip slope is Rhodic Eustrustox, Clayey, Ferruginous, NonacidRhodic and Aquic Kandiustox, Loamly, Ferruginous, Nonacidand Rhodic Kandiustox, Clayey, Ferruginous, Nonacidand at footslope is Aquic Kandiustox, Clayey, Ferruginous, Acid. The existing land suitability for oil palm in Kecamatan Langgikima is majority not suitable 22.050,15 ha (79,18%) because the low nutrient and high slope while marginally suitable only 5.796,46 ha (20,82%). Soil management adapted for resistor ," factor willincrease land suitability call to become moderately suitable 22.257,10 ha (79,93%), and not suitable 3.103,97 ha (11,15%) Keywords: soil formation, harzburgite, oil palm, land suitabilit