Army Award for. Maintenance Excellence. The Army Award for Maintenance Excellence award winner displays an expertise and professionalism in performing their tasks. Each unit is evaluated on their effectiveness in ensuring that Soldier competency is maintained.
The pedosphere is the outermost layer of Earth's continental surface and is composed of soil and subject to soil formation processes. It exists at the interface of the lithosphere, atmosphere, hydrosphere and biosphere. The total arable land is 10.9% of the land surface, with 1.3% being permanent cropland.
1 The lithosphere is the outermost mechanical layer and is the most rigid layer of the Earth. 2  The lithosphere consists of the crust, and some of the uppermost mantle. 3  The lithosphere averages about 100 km thick.4  It is somewhat thicker beneath continents, and dramatically thinner under mid-ocean ridges.echanical layers differ in their strength or rigidity. These layers do not correspond on a one-to-one basis with the compositional layers. The Earth has five mechanic layers: 1  The lithosphere is the outermost mechanical layer and is the most rigid layer of the Earth.