Industry, sector and description for Universal Display. Universal Display researches, develops, and sells organic light emitting diode (OLED) technologies and materials for the flat-panel display industry.
The first requirement for all master horizons other than O horizons is that they are composed mostly of mineral material. It is very important to be able to differentiate organic from mineral material. Dark color of the A horizon is due to the mixing of humus with mineral.
Name the soil horizons and describe each. â¢ The A horizon is commonly know as topsoil. â¢ The B horizon is subsoil and contains clay particles washed out from the A horizon. â¢ The C horizon is between B horizon and unaltered parent material.