simplicity of the method, availability of equipment, and the possibility to examine
colored and muddy solutions.
Laboratory measurements of specific conductivity of soil's water suspensions
allow estimating the changes in ions' concentration in the soil environment [4, 6].
Soil's electrical conductivity is the ability of the soil (suspensions) to conduct an
electric current. It depends on soil humidity, phase state of moisture, soil's salt content,
soil's temperature, density, and granulometric composition.
Specific electrical conductivity is used to estimate the total amount of salts of
sodium, potassium, calcium, chlorine, sulfate, hydrocarbonate, etc., dissolved in water
(suspension). The presence of ions of two- and trivalent iron, manganese, aluminum,
nitrate, etc. does not have a serious effect on electrical conductivity (unless, of course,
these ions are not contained in significant quantities). The conductivity varies with the
temperature, which often leads to a slight measurement inaccuracy. However, modern
devices allow minimizing measurement precision due to calculated and memory-stored
physical dependences between specific conductivity and temperature change.
Oak
Birch tree
Pine
Modrida
Glade
Fallow
Arable
land
Figure 3. Electrical conductivity of typical black soils, μS/cm
Source: Developed by the authors
Thus, the rotation variants have similar allocation of received values of electrical
conductivity in soil's water suspensions. Electrical conductivity is 130.3 μS/cm under
the rotation land's soil (in the 0-20 cm layer) and 120.3 μS/cm under mowned rotation
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