The Correlation Between Total Organic Carbon (TOC), Organic Matter and Water Content in Soil Collected from Different Land Use of

Abstract

Abstract: A total of twenty three sites distributed in different land uses of Kota Bharu, Kelantan was identified for the study. The relation of soil organic matter (SOM) content, total organic carbon (TOC) content, water content and soils texture for industrial area at Pengkalan Chepa, southwest (SW) of Kota Bharu district as a township and agricultural area at Banggu were investigated. These data sets were also correlated to temporal event in Kota Bharu district. Correlation analysis indicated that, generally, SOM and TOC concentration and water content had a positive correlation with clay and silt but negative correlation with sand. The relationships between SOM content, TOC content and clay + silt content, were also studied. The results showed that, SOM concentration was lower (P < 0.05) at Pengkalan Chepa area (3.41%) compared to SW Kota Bharu (5.14%) and Banggu (4.94%). At the same time, the TOC level also showed that Pengkalan Chepa area recorded the lowest concentration (0.90%) followed by SW Kota Bharu (1.02%) and Banggu (1.43%). The same trend was discovered for clay + silt content where the lowest concentration was recorded in Pengkalan Chepa (8.44%) and it was followed by SW Kota Bharu (34.25%) and Banggu (51.77%). The SOM was positively correlated with the TOC and clay + silt in all the study areas. The percentage of TOC in the soil samples from the study area ranged from 0.48wt% to 2.58wt%, with a mean of 1.40wt%, and the percentage of SOM, from 1.52wt% to 11.85wt% with a mean of 5.45wt%. The low TOC and SOM content in the soil was believed to be due to the low vegetation cover which led to the soil clay fraction mineralogy