Studies on Nutrient Distribution in Some Zambian Soils with Special Reference to Sulphur Using GIS (Geographic Information Systems) I. Total Sulphur Distribution in Major Zambian Soils |
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| Authors: | Togo Tsuji Austin Mambo Lackson K Phiri Ronald Msoni Sesele B Sokotela Olusegun A Yerokun |
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| Institution: | Japan International Cooperation Agency, Zambia Office: P.O. Box 30027, Lusaka, Zambia;Zambia Agricultural Research Institute, Ministry of Agriculture and Co-operatives of Zambia: Private Bag 7, Chilanga, Zambia;University of Zambia: P.O. Box 32379, Lusaka, Zambia |
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| Abstract: | Total sulphur content of some benchmark soils was evaluated by correlating with the contents of soil organic C and amorphous oxides (Al and Fe), and the particle size distribution. An equation model to calculate the content of total soil sulphur was first obtained by regression analysis. Introducing these chemical and physical data of all the map units except for the wetlands into the equation model, the sulphur level on a national scale was estimated for each soil mapping unit in the exploratory soil map of Zambia. Second, the total sulphur content was rated into 3 classes based on the frequency distribution of the total sulphur content in the benchmark soils. Finally, the rated total sulphur content was incorporated into the national soil map database of GIS to produce a map with the total sulphur content of Zambian soils. The extent of each class was calculated and the distribution of the areas was examined in relation to rainfall and soil formation. |
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| Keywords: | Al and Fe oxides GIS particle size soil organic carbon total sulphur |
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