Unaccounted Factors Determining Carbon Stocks in Forest Soils

sources of un cer tain ties in es ti mat ing soil car bon stocks in for est eco sys tems, in clud ing abiotic (me chan i cal com po si tion of soil) and bi otic (plants, earth worms) fac tors, are dis cussed. The re sults of com par a tive as sess ment of soil car bon stor age in co nif er ous-broadleaved and taiga for ests based on di rect mea sure ments and pedotransfer func tions are pre sented. It is shown that the es ti ma tion of soil car bon stocks in for ests based on both di rect mea sure ments and pedotransfer func tions re quires, along with other soil for ma tion fac tors, tak ing into ac count the most dy namic ones, in clud ing plants and soil biota, as well as the his tory of na ture man age ment. The cal cu la tion of soil car bon stocks should be car ried out with ac count of fine earth (< 2 mm frac tion) con tent.