What happens to a body after burial?

According to the law “On internment”, the decomposition period of a human body is 15 years. The number is based on the fact that it takes from 10 to 12 years to decompose a human body buried at a depth of 2 meters provided that the climate is temperate and the mechanical makeup of soil is average. In most cases the period is long enough for complete decomposition of a body because skeletal bones are subject to active decay due to subsoil acids.