MA is Mfg Plant Code (see http://www.harriger.com/exptire.htm), L9 is a tire size code, ABCD is optional manufacturer info, 036 is mfg date (in this case third week of unspecified year ending in 6, but not 2006) The newer tires are using 4 digits, the first 2 = the week, and the last 2 = the year. For example 4202 = 42nd week of 2002.
Desertification is a type of land degradation in which a relatively dry land region becomes increasingly arid, typically losing its bodies of water as well as vegetation and wildlife.esertification often causes rural lands to become unable to support the same sized populations that previously lived there. This results in mass migrations out of rural areas and into urban areas, particularly in Africa.
Many things can cause desertification including human factors like overgrazing or other land use that leads to soil erosion or natural factors like a shift in rainfall. Desertification can be identified in satellite images by comparing rainfall to vegetation growth. If plants grow after rain falls, then the land is still productive and desertification has not happened. If plants fail to grow after rain, then the land might have become non-productive.