There is a thick layer of humus in cold deserts

Answer 1

Actually, cold deserts typically have a thin layer of humus, not a thick one. Humus is the organic component of soil, formed by the decomposition of plant and animal materials. In cold desert regions, the extreme climate conditions, including low temperatures and limited precipitation, restrict the growth of plant life. This results in less organic material being available for decomposition and, consequently, a thinner layer of humus in the soil.