Humus content in arable lands of Bulgaria. II. Regional peculiarities of humus horizons of chernozems
2003
Filcheva, E. | Kr"stanov, S. (Institut po Pochvoznanie "N. Pushkarov", Sofia (Bulgaria))
Profiles of chernozems (552) were studied. Thickness of humus horizons, humus quality of two layers data was processed to determine the regional peculiarities. Four classes according to humus content in plough layer were established.
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