Express-diagnostics method for assessment of soil compaction for different cultivation methods
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Kuupäev
2020
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian Academic Agricultural Society
Abstrakt
Soil compaction remains a concern because of the heavy
tractors used in intensive agriculture. When axle loads of vehicles
increase, soil compaction is affected in deeper soil layers. An efficient tool
is needed to assess the impact of machines on soil. Therefore, an expressdiagnostics method was developed and implemented under Estonian
agricultural conditions. Since 1976, an investigation has been carried out
on how wheeled or tracked vehicles (WTV) influence soil under
agricultural conditions in Estonia. The main goal of the investigation was
to develop a mathematical model and corresponding computer simulation
system. Uncompacted and compacted soil was modelled using a
vegetation model of "guttated vegetation miniatures". The system allows
soil vulnerability to compaction to be assessed by the criterion (qabc) agroempirical bearing capacity (ABC). Both field and laboratory data were
used in the development of the system. We have found that at the deepest
layer the bulk density was higher for tilled soil compared to no-tilled soil.
Dry soil bulk density in no-tilled soil after 2 years in the deepest layer was
0.11 Mg m3 –1
less than tilled soil, and for no-tilled soil after 3 years in the
deepest layer it was 0.12 Mg m3 –1
less compared to the tilled field soil.
The amount of agronomically preferable aggregates (2–4.75mm) was
major in tilled soil compared to no-tilled soil. It means that the preferred
(in agronomical sense) soil particles Kstr in conventionally tilled
(ploughing – K2; K3) fields were significantly better compared to no-tilled
(O2; O3) fields in the trial plots. These results emphasize the benefits of
multifunctional modelling systems (computer simulation and simulation
by vegetation miniatures) and the need to improve assessment of
methodology for receiving adequate and probable results, and finally for
yield prediction.
Kirjeldus
Saabunud / Received 01.12.2019 ; Aktsepteeritud / Accepted 08.05.2020 ; Avaldatud veebis / Published online 11.05.2020 ; Vastutav autor / Corresponding author: Edvin Nugis e-mail: edvin.nugis@mail.ee
Märksõnad
express-diagnostics method, cultivation method, modelling soil compaction, computer simulation, vegetation miniatures, guttation method, articles