Summary
The estimation of free iron oxide by Deb's method in the red soils derived from basement complex containing mostly acid gneiss of Tanga region, Tanzania, was carried out. The results of the investigation revealed that the free iron oxide varied between 2 and 8 per cent and exhibited a highly significant correlation with the clay content of the soils. The amount of free iron oxide also, usually, increased with the depth of the soil profile. re]19730730
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Nandra, S.S. Free iron oxide content of a tropical soil. Plant Soil 40, 453–456 (1974). https://doi.org/10.1007/BF00011532
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DOI: https://doi.org/10.1007/BF00011532