ABSTRACT Humic substances (HS) comprise the passive element in soil organic matter (SOM), and represent one of the soil carbon pools which may be altered by different cover crops and weed control meth
Meliorative, partial deep tillage (PDT) has a high potential for a permanent increase in the carbon (C) and nitrogen (N) stocks. Through PDT, the lower-concentration, C and N-poor subsoil is tilled up
