Efimov O.E., Sorokin A.E., Balabko P.N., Savich V.I., Borodina K.S., Rashkovich V.N.

Soil compaction as a factor of soil fertility model correction

In this work we prove that high soil density and the dynamic tension fields cause change in the parameters of other physical fields, affecting soil. Higher soil density lowers MAC for mobile forms of toxic compounds in soils and increases optimums for mobile forms of nutrient elements. Local soil density changes the direction of migrational flows within the soil, it increases energy expenses needed for humus formation and plant development. Topsoil layers press on the underlying layers, which must be accounted for upon forecasting of the dynamics of soil formation processes. The data shows that in the sod-podzolic soils with density of 1.1 and 1.3 gcm-3 the porosity was 53.7 and 47.1%. With low soil density, the amount of mobile zinc and lead was 6.5±1.4 and 8.5±0.9 mgkg-1 under lawns and 25.6±2.5 and 14.6±1.6 mgkg-1 under residential areas. The increasing soil density led to higher energy demand by plants for NPK consumption and root development.

Keywords:SOIL DENSITY, DYNAMIC TENSION FIELDS, MAC, SOIL FERTILITY MODELLING