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.
C horizon is much less affected than the A or. B horizons by physical, chemical, or biological. agents. Soil materials that form the C horizon. in their original position, by weathering of. bedrock, are sedentary or residual, whereas soil. materials that have been moved to a new loca-. tion by natural forces are said to have been. transported.