The article presents data on soybean yield in anthropogenically transformed peat soils of Polesye region. It is determined that it can generate up to 40 cwt grain ha^–1 and 113 cwt dry matter ha^–1. Yield level is determined by the varietal characteristics, the degree of peat soil drawdown and the complex agricultural technology. Biologically active substances (BAS) can be used for presowing treatment of seeds and its effectiveness is not inferior to biological preparations based on symbiotic bacteria. On the average, in the variants of BAS seed treatment against a background of phosphorus and potassium fertilizers application the grain yield obtained was higher in comparison with the variants of presowing inoculation of seeds by biological products on the basis of symbiotic microorganisms. By BAS seed treatment against a background of phosphorus-potassium fertilizes application the grain yield obtained was comparable with variants of nitrogen fertilization: 21.6 cwt ha^–1 (Р₄₀К₇₅) and 25.2 cwt ha^–1 (Р₈₀К₁₅₀) versus 21.5 cwt ha^–1 (N₃₀₊₁₀Р₄₀К₇₅) and 24.1 cwt ha^–1 (N₃₀₊₁₀Р₈₀К₁₅₀), respectively. High efficiency was shown by water-soluble granular complex fertilizer ADOBE Profit, applied as foliar sprays. Grain yield in these variants available both at presowing inoculation of seeds by biopreparations and biologically active compounds, was at the level 23.0–27.9 cwt ha^–1. The use of BAS for presowing seed treatment or foliar application, and ADOBE Profit allows to reduce the use of nitrogen fertilizers and minimize mineralization of organic matter of peat soils. Agroeconomic assessment of efficiency of cultivation of soybean has shown that due to the complex agrobiotechnologies techniques it is possible to ensure the yield of 35–45 cwt fodder units ha^–1 at the cost 161–200 $ per ton grain and 475–667 profit $ ha^–1. The economic calculations have shown that soybean cultivation for grain grain is economically expedient at the grain yield not less than 11 cwt ha^–1.

   The article presents the results of parsnips initial material studying for breeding for conditions of Belarus. High-yielding parsnip accessions of marketable roots such as Students, All American, Belyi aist, Improved Hollow Grown are identified. By intervarietal hybridization of parsnip accessions valuable breeding and hybrid combinations are created: Improved Hollow Grown ✕ Belyi aist, All American ✕ Belyi aist, All American ✕ Student with a yield of commodity roots about 40,4–42,7 t/ha. The description of the new varieties of parsnip Pan and Atlant. The variety has high yield, quality of root crops, good keeping quality during winter storage.

   The researches results of agricultural chemistry efficiency of universal liquid organomineral fertilizer of Rokogumin on sod- podzolic soils in article are presented. Fertilizer efficiency at winterь wheat, spring barley and rape, soy and corn tillage is presented.

   The 3-jahrs data of mineral fertilizer influence and application of biopreparations Ryzobophyt and Polymiksobakteryn on botanical composition of legume-cereal grass stand for hay using under conditions of the western Forest-Steppe of Ukraine in dark-grey podzolic drained soils are presented.

   On the sod-podzolic soils of the central part of Belarus, such herbicides as Nimbus SC (1,7 l/ha) and Teridox EC (2,0 l/ha), which were applied after sowing before the seedling emergence of F1 hybrids and a cultivar of spring rape, provided high biological efficiency, such as 78,4 and 78,1 %, respectively, by the number of weeds, and 83,7 and 85,0 % by their weight. Economic efficiency of herbicides Teridox EC (2,0 l/ha) and Nimbus SC (1,7 l/ha) was also high; oilseed yield increase made up 0,87–1,17 and 0,96–1,21 t/ha or 56,1–73,6 and 61,9–76,1 %, respectively, among the studied genotypes. The application of the herbicides led to the increase of fat content in the oilseeds by 0,4–1,4 absolute percentage points.

   The specific composition and harmfulness of weed plants in calendula (Calendula officinalis L.) crops in the Republic of Belarus is determined. The period of safe growing of weed plants in Calendula officinalis L. makes not more than a month from the moment of its sowing (till 3–4 pairs of the crop leaves formation stage) The competition with weeds for more prolonged period of time brings a reliable 63,2–71,1 % inflorescences yield deficiency. The maximum calendula seed yield losses from weeds can reach 91,2–98,0 %.

   The results of monitoring to identify tobacco rattle virus, potato mop-top virus and alfalfa mosaic virus in the planting of potato at the Republic of Belarus are present in the article. It is established, that the greatest distribution from three studied viruses has a tobacco rattle tobravirus, which is found out in each of investigated areas.

   The article presents the results on studying of the herbicide Alister Grande, MD application in winter wheat and winter triticale crops. It is determined that this preparation provides the greatest effect in autumn application at tillering crop stage.

   The article presents the results of two years research on the efficacy of the insecticide Movento Energy, SС (f. Bayer Crop Science AG, Germany) for plant protection against pear psylla (Psylla sp.). The insecticide after double application with a consumption rate of 0,6 and 0,8 l/ha showed 100 % effectiveness against adults and larvae of the pest on the 3-rd day, and 92,5 and 97,6 % – on the 7-th day after the second treatment.

   In order to determine the internal infection of triticale grains during 2012–2015, the phytopathological analysis was carried out. It was shown that the infection rate of the grains made up from 43 to 98 %. It was found that the Alternaria Nees. genus fungi dominate in numbers. Besides that, it was found that the Fusarium Link., Epicoccum Link., Cladosporium Link., Penicillium Link., Bipolaris Shoemaker and Nigrospora Zimm. genera representatives invaded the grains.

   The article presents the results of studies on the effectiveness of fungicides, micronutrients and growth regulators on morphological and anatomical features of flax plants stem. It is found that the preparations slightly lower general, technical length and thickness of the stem. The thickness of the bark increases for 4–12 % in comparison with the control.

   The best ratio of bark/wood (1:1,5) is marked for Abacus, Helcom Boron, Mikrosil and LPF. By other preparations application the ratio has changed towards the increase of timber at the bark thickness decrease (ratio 1:1,75–1:2).

   Sorting of Chicory Root seed as the aerodynamic properties and specific gravity is influenced on the intensity of their germination it was found. In the process of chicory root seed sorting with high 90–97 % germination is not found a significant increase of quality indicators. In the process of chicory root seed sorting with 80–89 % germination even at the slightest air speed in the aspiration channel the energy of germination and germination rate are significantly increased. The air speed increasing in the aspiration column up to 6,4 and 5,8 m/s is helped to improve the energy germination and seed germination, which were the same as in the control, but the loss of seed is increased in 15,9–48,7 times as compared the sorting regime with an 4,6 m/s air speed. Sorting regimes are also influence on the weight of 1000 seed. With the air speed increasing the weight of 1000 seed is significantly increased, and by the 5,8 and 6,4 m/s air speed it was the same as in the control.

   It is necessary to carry out drop strip irrigation not less 2 hours with an expense of droppers more than 2 liters/hour and distance between them 40–50 centimeters for creation remontant raspberry and highbush blueberry optimal cultivation irrigation conditions on Brest region typical soils. It is necessary making drop irrigation with dropper demand more than 1litres/hour and distance between them 20–30 centimeters for making garden strawberry optimal cultivation conditions on typical soils. This promotes contour profile coincidence. Maintenance of soil relative humidity at the level of 80 % of field moisture capacity promotes improvement raspberry, blueberry berries trade dress.