Abstract:
Infiltration that occurs in one place is different from another place and at another time, one of which is determined by the type of land use. The purpose of this study was to analyze the physical properties of the soil and its relationship with infiltration in mixed forest stands, Mahogany stands, and Imperata in the Special Purpose Forest Area (KHDTK) of Lambung Mangkurat University. Data were collected directly in the field using an infiltrometer with the constant rate method, which then analyzed the data using the Horton method. Then to collect data on the physical properties of the soil using purposive sampling method. The results showed that the largest bulk density value was in Alang-alang grasslands with a value of 1.16 cm / gr3, the particle density value in mixed forest stands with a value of 2.52 gr / cm3, the porosity value in mixed forest stands with a value of 55 28%, the highest permeability was found in Alang-alang stands with a value of 8.15 cm / hour, the highest soil moisture was found in mixed forests with a value of 25.28%. The results of the infiltration rate under Mahogany stands were higher at 146.33 mm / hour, and the lowest was in Imperata with 19.66 mm / hour mixed forest with a value of 123 mm / hour. The difference in infiltration rate is influenced by the type of vegetation and the physical properties of the soil
