Quality of Land Fertility on Post Cement Mine Areas in South Kalimantan, Indonesia

摘要

Cement mining activities PT. Indocement Tunggal Prakarsa (PT.ITP) in Tarjun Kotabaru has partly entered the post-operative stage and it is being prepared for revegetation. To restore the level of fertility of land according to the standards required to be revegetated with the species of plants belonging to fast-growing species. In order for successful planting activities it is necessary to know the level of fertility. The types of soil can be found in the study area included; clay, laterite, and lime-stone. This collecting of sample uses a purposive sampling method, in which sample points are placed on each soil type. The result showed that soil fertility level is relatively low with C-organic, P_(2)O_(5), K_(2)O, CEC, and basic saturation parameters under secondary natural forest condition so that fertilizer addition is needed in each type of land to increase fertility.