Soil health diagnostics
Comprehensive soil diagnostics is necessary for deciding on the measures application, which cleans the soil from the harmful organisms resting structures to a level below the harmfulness threshold and normalizes the soil health parameters. To determine the soil phytosanitary condition, the direct methods for quantitative accounting of individual species are used. The development of methods for quantitative accounting in the soil the pathogenic species from the genera Fusarium and Pythium is relevant. To make decisions on phytosanitary crop cultivation technologies optimization, it is necessary to determine the harmfulness thresholds, which depend on the soil type and its suppressiveness level. The quantitative method, determination in percent of soil suppressiveness, based on the limitation the pathogens growth has been developed. The method also allows to investigate the contribution of biotic and abiotic mechanisms. Determining the number of pathogens, phytophages, weed seeds in the soil should be supplemented with a study of suppressiveness, phytotoxicity, number of saprotrophic microorganisms groups. At present, integrated soil diagnostics in practice of the Siberian region farms have been tested by us for 18 phytosanitary and environmental parameters. On the soil diagnostics basis, a differentiated, as applied to a separate field, a soil rehabilitation measures complex, designed for a 3-5 years long period, is recommended.