In model experiments the use of hydrogel in light-brown soils increased the germination of radish by 85 %. When light-brown soils are used rationally in non-irrigated conditions, the amount of organic carbon in them is higher than in the virgin lands. The structural state of the soil is improved by the hydrogel, especially under irrigation. The use of the hydrogel improves morphological characteristics of the soil, increases its wetness and the presence of worms. The maximum amount of organic carbon was found in the non-irrigated conditions (boghara) in the variant with the gel. The weight of the radish in irrigated conditions (drop irrigation) is higher, especially when using the gel. Irrigation without gel improves soil criterion and its productivity in comparison with boghara (no gel). Boghara with gel improves the parameters under examination more effectively than irrigation without gel.
Depending on a method for determining oil products and chemical features of an extraction agent, research of the same soil samples has shown different results. The highest values of oil products analyzed using carbon tetrachloride on a concentration meter AN-2 may indicate the most complete determination of gross content. Hexane extraction in determining oil products on spectrofluorimeter «Flyuorat-02» has shown the lowest values of all three methods.The proportion of soluble fractions which are in a mobile state or in the dissolved phase (summing up the results of their determination on «Flyuorat-02») can be called a mobile fraction (OPm). The high proportion of OPm (over 50%) in the topsoil can serve as a diagnostic indicator of permanent income of oil products to the soil. As a result of autoclaving at temperatures up to 170 °C and a pressure of 1,5 atm volatile fractions evaporate (OPv). In uncontaminated virgin soil oil is a fraction of organic compounds of the soil. The oil volatiles have not been defined that may be a diagnostic indicator of the lack of intoxication soils.
The surface horizons of the soils of traffic areas of Rostov-on-Don are characterized almost twice higher content of soil particles from 1 mm to 0,01 mm than native chernozems. The higher anthropogenic load provides the higher the content of sand fractions in the particle-size distribution. The accumulation of heavy metals (HM) in urban soils of roadside areas is relatively small, which is also due to a decrease of the soil sorption capacity. Significant excess of the estimated permissible concentrations was detected only for zinc and lead, and the higher the pollution level, the weaker the correlation between the particle size distribution and the HM content. This is justified by the influence of external factors on the accumulation rate of chemical elements.
The science and political initiatives focus is not only concerning agricultural intensification for food security and human development. The prevention of land degradation and loss is important, and a new land-use technological platform is needed for human well-being and the ecosystem service coupling. An adverse change in the soil quality of the steppe terrain under the standard agriculture is revealed, and the dynamics of the ecosystem service is assessed. The results indicated that the standard land-use practice deteriorates stability of the soil cover, failing to ensure the soil productivity and the ecosystem services in a dry terrain. For land degradation prevention and soil-environmental services refinement, a new transcendental Biogeosystem Technique (BGT*) technological platform was developed. The BGT* is capable of providing long-term, sustainable land-use management. The BGT* methodology includes intra-soil milling, intra-soil pulse continually discrete watering, and intra-soil waste recycling. The BGT* is a basis for future political initiatives in land-use management to prevent land degradation and loss, to increase soil productivity, and to provide soil-environmental services.
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