Basic soil chemical properties were assessed in
a long-term tillage and crop rotation experiment 15 years after its
establishment on a Chernozem in Raasdorf (Austria) with four
tillage treatments – mouldboard ploughing, no-till, deep conservation
tillage and shallow conservation tillage – and two crop
rotations. The following parameters were assessed: pHCaCl2, pHH2O,
electrical conductivity, cation exchange capacity, total nitrogen,
total organic carbon and total carbon. Among which, pHCaCl2,
pHH2O, and total carbon increased with soil depth while electrical
conductivity, cation exchange capacity, total nitrogen, and
total organic carbon decreased with soil depth. The differences
between tillage treatments occurred after 15 years in the upper soil
layer from 0-5 cm with higher values of electrical conductivity
under no-till, deep conservation tillage and shallow conservation
tillage than with mouldboard ploughing, higher values of cation
exchange capacity and total nitrogen for no-till than for mouldboard
ploughing (with deep conservation tillage and shallow
conservation tillage showing intermediate values) and more total
organic carbon for no-till and deep conservation tillage than for
mouldboard ploughing. At a 5-10 cm depth, electrical conductivity
was higher for no-till than for mouldboard ploughing. Values
of pHCaCl2 and pHH2O did not differ between tillage treatments in
any soil layer. In deeper soil layers, tillage did not affect the analysed
parameters. Crop rotation did not affect any of the analysed
soil chemical properties.
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