The competitive environment orients rural producers to produce safe, high-quality products. The solution of this problem is impossible without the use of reliable and timely production information obtained by modern means of measurement. In the list of parameters of the system of operational decisionmaking in the production of grain and seeds, the determining role belongs to information about their moisture content. Reliable and timely information on humidity can significantly reduce the technical, technological and social risks affecting the economy of agricultural enterprises. Currently, the market of the necessary complex of grain moisture meters is occupied mainly by foreign developments. The most popular field electric moisture meters are not produced by domestic instrument-making companies. Foreign devices are graded on varieties of crops grown in completely different climatic and soil conditions. There are differences in the standard means and methods of grain preparation, which are used by manufacturers in the calibration of devices. In order to avoid risks when using imported devices, it is necessary to assess their adaptability to domestic crops and conditions of use. The article presents the results of a study of a new model from the line of capacitive moisture meters produced by the well-known Finnish company Farmcomp. The defining concept of the device model is the minimization of random errors caused by the user's actions, and automatic compensation of the influence of the volume density (nature) of the grain mass. The complexity of measurement technologies and the limited humidity range reduce the possibility of using the device in production conditions. The methods used in the device to compensate for factors affecting its readings do not fully provide the results expected from their use. Calibration of the device on domestic crops and varieties in the ranges of change of their basic properties (humidity, volume density), characteristic for the Russian conditions is necessary.

Relevance. For a more complete realization of the biological potential inherent in the culture and directly in each variety, in the agrotechnology used, separate elements are used that contribute to more effective plant development. This should include the use of biological preparations that are not only able to stimulate and regulate the growth and development of plants, but are also safe for the environment. In this regard, the research results presented in this paper are relevant and timely.Materials and methods. In our study, we studied the effect of pre-sowing treatment of spring wheat seeds and its (processing) aftereffect on grain quality indicators and seed sowing properties. The early-ripening variety of spring soft wheat Iren was taken as an object of research. The subject of the study is biological preparations, their effect and aftereffect during pre–sowing seed treatment on the formation of grain and the quality of the seed material of the crop.Results. Studies have revealed differences in the intensity of the effect of presowing seed treatment with biological preparations and the aftereffect of treatment on the quality indicators of spring wheat grain. The aftereffect of the drugs increased the protein content in the grain. The maximum protein content in the experiment was obtained in variant 2 (the preparation was obtained by the method of VAG based on pine needles (HS 22)) – 17.0%.The gluten content in the grain in variants of experiments 2 and 3 was formed above 32%, which corresponds to the 1st class. The maximum gluten content in the grain was obtained in variant 2 (HS 22) – 41.8% in experiment 3 (aftereffect). The vitreous content of the grain in all variants of experiments 2 and 3 is higher than 60%, which makes it possible to classify the grain to the 1st class. A higher level of grain nature was obtained on variants with the aftereffect of drugs. Grain on the variants of experiment 3: control, 3 (LP 4), 8 (Cytohumate), 9 (Lignohumate) with grain in kind above 750 g should be attributed to the 1st class.