EVALUASI SIFAT KIMIA TANAH MENURUT JARAK DARI SUNGAI DI DAERAH PASANG SURUT KECAMATAN KOTA BESI, KOTAWARINGIN TIMUR, KALIMANTAN TENGAH

Basuki,1) Zubaidah, S.,1) Husin 1)

Abstract

ABSTRACT
This study aims to determine the effect of the location distance from the river bank and the depth of
soil layer to the soil chemical properties in the tidal land area. The study was conducted in April until
June 2016 in the tidal areas of Bajarum village, District of Kota Besi, East Kotawaringin, Central
Borneo Province. The study used survey methods and soil sampling in the field, analysis of soil
samples in the laboratory and continued with analysis and description of data. Soil sampling was
conducted at distances of 250, 500, 750, 1.000, 1.250 and 1.500 meters from the Mentaya river bank
at two depth soil layers (0 - 25 cm and 25 - 50 cm). The soil chemistry properties analyzed included
pH, cation exchange capacity (CEC), base saturation, organic C, N total, total P2O5, total K2O,
alumunium and hydrogen exchangeable and soil fertility status. The results of study showed that: (1)
The further distance of soil from the position of Mentaya river bank there is an increase of organic C,
total P2O5, total N, total K2O, pH, CEC, base saturation and soil fertility status, on the contrary
showed a decrease in alumunium and hydrogen exchangeable. The limiting factor of soil fertility is
mainly the low base saturation, besides that at some point observation also due to low CEC, total
P2O5 and total K2O. (2) Sub soil layer (25 - 50) cm has a higher pH and base saturation values
compared to topsoil layer (0 - 25) cm. In contrast, topsoil layer has CEC, alumunium and hydrogen
exchangeable, total P2O5, total K2O, total N and organic C values higher than sub soil layer.
Keywords: distance from river, tidal soil, soil chemical properties.