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Land degradation is the loss in the productivity of land resources due to many factors, especially soil erosion. Nutrient depletion and soil organic carbon (SOC) loss are the main impacts of erosion which not only cause declining crop yield, but also induce off-site impacts, such as eutrophication and greenhouse gas (GHG) emission. The main objective of this study was to estimate the depletion of...
Three Oxisols, developed from serpentinite (Sungai Mas Series), basalt (Kuantan Series) and andesite (Segamat Series), selected to represent the most common Oxisols in Malaysia were sampled and studied. The objectives of this study were: (i) to determine mineralogical composition and factors responsible for changes in point of zero charge (pH 0 ) of the variable charge component of three Oxisols;...
Acid sulfate soils have been a subject of much research, but these studies have seldom been directed at the chemistry of the iron-poor acid sulfate soils. A study was therefore conducted to determine the effects of applying Fe(III) oxides and/or organic materials on pH, pe and solution chemistry of an iron-poor acid sulfate soil upon submergence. Linau Series soil, classified as Typic Sulfaquepts,...
Six highland Andisols along an E-W sequence in Java Island, Indonesia were sampled with the objective to assess the influence of the change of parent ash materials on surface reactivity of Andisols, with emphasis on short-range order mineral constituents and active Al and Fe compounds on fluoride and phosphate sorption. Because of the variety in parent ash materials and under the typical environmental...
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