References in periodicals archive ?
An A horizon is defined as a soil horizon with an accumulation of humified organic matter (Soil Survey Staff 1999).
Eluvial (Chapter 2)--Material that has been removed by suspension or solution; usually in reference to a soil horizon from which material has been removed.
The blade is pushed into the vertical face of a soil horizon; the force required to break away the soil from the horizon using the blade is then measured by pushing the blade sideways with a penetrometer.