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Abstract
The agrochernozems of the Kansk forest-steppe used for the cultivation of rapeseed and camelina were characterized by a high humus content both in the 0–20 and 0–40 cm layer. The carbon content of humus (Chumus) (Dump) and carbon of water-soluble organic matter (CH2O) had a weak spatial variability (Cv = 1.3-11.7%), the content of carbon extracted with 0.1 n alkali (C0.1 n NaOH) had an average and very high degree of spatial variability (Cv = 18.7-66.1% ) The heterogeneity of the soil cover was a factor determining the average statistical decrease in the content of stocks of all fractions of humic substances, with the exception of water-soluble carbon of humus. Fields with a pronounced meso- and microrelief and the presence of thinner types of agrochernozems are recommended for use for the cultivation of camelina, as a crop less demanding on soil conditions than rape.
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