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In the study, a method of automated detection of croplands and natural grasslands using multi-year time series of the vegetation indices was developed and implemented. The metho­dology is based on a new recognition feature enabling identification of all lands cultivated over a long period. The new recognition feature was calculated from time series of the MODIS vegetation indices. It takes into account both intraseasonal and interannual characteristics of the vegetation period for arable lands with spring and winter crops, as well as for natural grasslands. The methodology determines: the procedure of obtaining time series of the NDVI and EVI vegetation indices for the period from March to November in the given years; gene­ralization of the time series by land cover categories and agro-climatic zones; dates for calculating the recognition feature in each zone; calculation of the recognition feature; adaptation of the decision rules to the regional environmental conditions (threshold values for the agro-climatic zones); procedure of classification into croplands and grasslands. Croplands within the territory of the European part of Russia were mapped for the period from 2000 to 2016. The assessment of recognition accuracy and comparison of the results with the existing products confirm that the developed recognition feature can be successfully used for cropland detection and can improve the accuracy of data interpretation when applied along with other features.

The aim of the research was to study the chemical composition and toxic properties of plant phytocomplex, which have the most pronounced adaptogenic properties. Object of the study: a phytocomplex including levsea safflower (Rhaponticum carthamoides), serpent crown (Serratula coronata), fenugreev creeper (Filipendula ulmaria). Initially, the chemical composition was determined in selected plants, and then the alcohol extract from the phytocomplex was tested in white mice for toxicity. The toxicity study of extract of the studied phytocomplex was carried out on mice divided into 2 experiment and 2 control groups (n = 5 in each group), which was injected parenterally and intragastrically at once in a volume of 0.5 ml/mouse; the maximum dose of extractive substances of the phytocomplex was 2.5 g/kg of body weight in terms of dry matter. In the control, physiological saline was injected once in the same volume. Within 10 days the clinical condition of the animals was monitored. Before and after the experiment the blood was examined for the number of erythrocytes, leukocytes and hemoglobin concentration. The results of studies of phytocomplex containing water-alcohol extracts of the herbs Rhaponticum carthamoides, Serratula coronata, Filipendula ulmaria, showed that the biologically active substances in it are: amino acids - aspartic (3.5.3.9 g/100 g), glutamic (2,5...3.0 g /100 g), leucine (1.9...2.0 g/100 g), tyrosine (1.2...1.4 g/100 g), lysine (1.6 g /100 g ); Vitamins C (62.0.77.0 mg /%), E (6.2 mg /%), carotenoids (65.0.113.0 mg /%), PP (11.5 mg /% ); Ecdysteroids (418.0.2170 mg / kg), and flavonoids (3.0.. .7.2% of the dry matter). All the herbs of the phytocomplex contain protein, sugars, vitamins, amino acids, tannins and flavonoids. Intragastric and intraperitoneal administration of the phytocomplex to white mice showed no toxic properties.