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.
Soil Horizons â O, A, E, B, C, R. They will be able to see that soil horizons are different and that not all horizons may be present. All horizons are not always present. Most typical profile is A-B-C in fields or O-A-B-C in forests. The R horizon may be very shallow or very deep.