“Are we meeting after school?” “What are we learning about today?” ...

A grey or light-coloured 'E' horizon is the result of severe leaching, or eluviation, which washes out everything but quartz grains. Eluviation is the removal of soil, clay, silt or fine organic ...

A Professor of soil science at the Obafemi Awolowo University ... a combination of sandy to sandy loam topsoils and illuvial B horizons. These soils exhibit characteristics such as acidity ...

Soil organisms, like earthworms, mix the materials together, merging the boundaries between the horizons. These soils are leached, but not heavily, so the aluminium and iron oxides are dispersed ...