1 Infection, such as the ones that cause the common cold or diarrhea, can cause temporary vertigo via an ear infection. 2  This inner ear infection is generally viral, harmless, and usually goes away in one to six weeks, but drugs are available if it is severe.
Humus has a characteristic black or dark brown color and is organic due to an accumulation of organic carbon.Soil scientists use the capital letters O, A, B, C, and E to identify the master horizons, and lowercase letters for distinctions of these horizons.umus significantly influences the bulk density of soil and contributes to moisture and nutrient retention. Soil formation begins with the weathering of humus. In agriculture, humus is sometimes also used to describe mature, or natural compost extracted from a forest or other spontaneous source for use to amend soil.
humus. humus (hyÅËmÉs) [ key ], organic matter that has decayed to a relatively stable, amorphous state. It is an important biological constituent of fertile soil. Humus is formed by the decomposing action of soil microorganisms (e.g., bacteria and fungi), which break down animal and vegetable material into elements that can be used by growing plants.