The production and accumulation or degradation of organic matter and humus is greatly dependent on climate. Temperature and soil moisture are the major factors in the formation or degradation of organic matter, they along with topography, determine the formation of organic soils. Organic matter tends to accumulate under wet or cold conditions where decomposer activity is impeded by low temperature[93] or excess moisture which results in anaerobic conditions.[94]
الرئيسية 
