Department of Life Environmental Conservation;
Faculty of Agriculture;
Ehime University;
Matsuyama;
Japan;
School of Agricultural;
Earth and Environmental Sciences;
University of KwaZulu-Natal;
Pietermaritzburg;
South Africa;
Department of Soil and Environment Sciences;
Faculty of Agriculture;
University of Khartoum;
Khartoum;
Sudan;
Allophane; Kaolinite; Montmorillonite; Mutual; Adsorption; Lead; and; Phosphorus;