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.
Hidden Horizons. Below the line at which the land appears to meet the sky, there are other horizons. These âhiddenâ horizons are the descending layers within a soil. Horizons are the visible evidence of soil-forming factors at workâclimate, organisms, relief (topography), parent materials, and time. Scientists group soils based on the arrangement and properties of horizons.