Authors : Yuanita; Roby; F.Silvi Dwi Mentari; Haryatie Sarie

Volume/Issue : Volume 8 - 2023, Issue 12 - December

Google Scholar : http://tinyurl.com/2wffb437

Scribd : http://tinyurl.com/mw74enat

DOI : https://doi.org/10.5281/zenodo.10409749

Abstract : Efforts that can be made so that the productivity and fertility of ex-coal mining soil can survive or allow it to be further improved include efforts to add organic material by providing biochar so that soil that is critical or lacking nutrients can add nutrients. The aim of this research is to obtain ex-coal mining land that can be used for agricultural land and plantation land by reclamating ex-coal mining land with the provision of biochar so that it is hoped that the land can be improved properly. This research was carried out in two places, namely (1) the former coal location of PT. Puspa Juwita, Tanah Datar Village, Muara Badak District, East Kalimantan and (2) nutrient testing was carried out at the Soil Laboratory of the Samarinda State Agricultural Polytechnic. It can be seen from the results of the soil analysis that by administering 75 kg/bed biochar (Sampel 3) there was an increase in the chemical properties of the soil on ex-mining land owned by PT Puspa Juwita, Tanah Datar Village, Muara Badak District, Kutai Kertanegara Regency, where the P element = 0.2560% , K = 0.73151 %, N = 0.2949, organic C = 2.949 %, Mg 0.4675 %, Fe = 21083 ppm, Al = 4736, CEC = 12.30 me/100 g and pH = 7.16

Keywords : Biochar, Soil, Coal Mine.