The aim of the study was to determine the
influence of cover crops biomass, mixed with the soil on different
dates and with the use of different tools in field conditions. The
cover crop biomass had a beneficial influence on the total porosity
of the 0-20 cm layer of the soil after winter. The highest porosity
was achievedwith cover crops of buckwheat, phacelia and mustard,
the lowest with rye. During the vegetation period the highest
porosity of soil was observed in the ridges. Among the remaining
non-ploughing cultivations, pre-winter use of stubble cultivator
proved to have a beneficial influence on the soil porosity, providing
results comparable to those achieved in conventional tillage.
The differential porosity of the soil was modified not only by the
catch crops and the cultivation methods applied, but also by the
sample collection dates, and it did change during the vegetation period.
The highest content of macropores after winter was observed
for the phacelia cover crop, and the lowest in the case of cultivation
without any cover crops. Pre-winter tillage with the use of a stubble
cultivator increased the amount of macropores in soil in spring, and
caused the biggest participation of mesopores as compared with
other non-ploughing cultivation treatments of the soil. The smallest
amount of mesopores was found in the ridges.
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