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.
join brainly today. Which materials typically make up the A horizon in soil? silt and pebbles sand, silt, and clay sand, silt, and pebbles sand, clay, and pebbles. Earth Sciences.