Abstract:

This study aims to determine the characteristics of the chemical properties of the soil in the bauxite mining area according to the age of reclamation, the initial setting of the environment and the location that has not been reclaimed. The research variables were soil chemical properties including soil pH, N-total, P-total, C-organic, potassium (K), base saturation (KB) and cation exchange capacity (CEC). Sampling at a depth of 0-20 cm as many as 3 (three) samples at one location, there are 5 (five) sampling locations, namely the initial environmental baseline location, mining sites that have not been reclaimed, reclaimed land aged 1 year, reclaimed land aged 2 years, and 5 year old reclaimed land. The data was processed using the Variety Print Test method on the observed variables to determine differences in soil chemical properties at bauxite mining sites according to the age of reclamation, land has not been reclaimed and the initial environmental baseline and to find out which location gives a significant difference using the LSD Test (Least Significant Difference). The results of the study found significant differences in soil chemical properties according to the age of reclamation, the location has not been reclaimed and the initial environmental tone at the bauxite mining site for soil chemical properties, namely soil pH, N-total, P-total, C-organic, potassium, and base saturation. However, the chemical properties of the soil, namely the Cation Exchange Capacity, did not show significant differences according to the age of reclamation, the location has not been reclaimed and the initial setting of the environment. Soil pH conditions are in the acidic category with a pH value of <5. N-total condition, P-total and C-Organic decreased with the age of reclamation and the location has not been reclaimed with the value of each parameter still under the initial environmental baseline conditions before bauxite mining. Reclamation of ex-bauxite mining land really needs to be managed and improved through regular maintenance in order to improve soil conditions, especially soil chemical properties by providing organic matter, P and N elements and vegetation needs to be maintained optimally.

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