| 英文摘要 |
Agricultural productivity depends on the physical and chemical properties of the soil, thus affecting the level of agricultural soil fertility. However, fertilization activities can increase the amount of pollutants. Environmental risks can affect environmental changes and reduce the fertility of agricultural land. Thus, a study was conducted to analyze magnetic susceptibility, electrical conductivity, and heavy metal contamination of surface soil in agricultural land in the Kumelembuai area, Tomohon City, North Sulawesi, Indonesia. The agromagnetic method with magnetic susceptibility parameters was used and supported by X-ray diffraction (XRD), X-ray fluorescence (XRF), and electrical conductivity. The results showed that a relatively high magnetic susceptibility value (χLF) indicated the presence of heavy metals resulting from fertilization. The electrical conductivity value of the surface soil obtained was not high enough, meaning that the ability of the surface soil in Kumelembuai to bind water was not strong enough. The lack of soil's ability to bind water can reduce soil fertility. XRD analysis shows the presence of Labradorite, Anorthite, Tridymite, Cristobalite, and Graphite minerals, which are important in providing good soil structure and supporting plant growth. XRF analysis shows high Fe content in the surface soil and the presence of heavy metals such as Ag and Pb. Thus, magnetic susceptibility can be obtained as a proxy indicator of surface soil in agricultural land residues. |
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