Purpose. Reveal varietal features of formation grain sorghum yield structure elements depending on inter-row spacing and fertilizing doses of nitrogen fertilizers. Methods. Laboratory, field, statistical. Results. Data on features of structural elements formation and productivity of grain sorghum in dependence on varietal characteristics, inter-row spacing and level of mineral nutrition are presen­ted. An important indicator for plant productivity formation is productive tillering, since grain sorghum, like most cereals, has the ability to tiller, which under favourable conditions allows forming up to 25–45% of yield on the side shoots. In our case, sowing of grain sorghum with sowing rate 190 thousand pcs./ha and inter-row spacing 35, 50 and 70 cm, respectively, we got the same plant nutrition area – 526 cm2; the distance between plants in the row is 15, 10.5 and 7.5 cm, respectively. The average number of grains per panicle in the sorghum hybrid ‘Lan 59’ according to the experiment was 866.9 grains, but the maximum values were observed with inter-row spacing 70 cm and fertilizers N60P60K60 + N40 – 1035.1 pcs. In hybrid ‘Brigga F1’, on the average in the experiment was 554.3 pcs. grains/panicle, and with inter-row spacing 70 cm and fertilizing by nitrogen fertilizers N20–60, respectively 595.7 – 602.4 pcs. We obtained similar indicators in hybrid ‘Burggo F1’ and fertilizing rate N60P60K60 + N40 – 961.7, but on average, in the experiment, the hybrid formed 858.6 pcs. grains/panicle. Mass of grain from one plant allows fully evaluate individual productivity of plants of studied hybrids. The best indicators of grain mass per plant were obtained with inter-row spacing 50 cm and fertilizing rates N60P60K60 + N60. So, on average, in the experiment in hybrid ‘Lan 59’, 41.2 g of seeds were formed per one plant, in the hybrid ‘Brigga F1’ – 63.4 g, in the hybrid ‘Burggo F1’ – 64.0 g. The best weight parameters of 1000 seeds were obtained with the inter-row spacing 50 cm and fertilizing rates N60P60K60 + N60, that is, ‘Lan 59’ – 37.3 g, ‘Brigga F1’ – 37.4 g, ‘Burggo F1’ – 30.2 g. Conclusions. Changes in inter-row spacing and level of mine­ral nutrition cause variability in formation of yield structural components of grain sorghum hybrids – productive tillering, number of panicles per hectare, number of grains per panicle, mass of grain per plant, mass of grain per panicle and mass of 1000 seeds, which determine individual productivity of plants.

The study of impact of complex application of biological compositions based on fixing nitrogen by microorganisms and plant lectin and nitric fertilizers on productivity and quality of grain of winter wheat on the dark-grey soil in the field terms was conducted. It is shown, that presowing treatment of seed by biological compositions stimulated forming of greater productivity with the best quality.

Purpose. To define the role of fertilizers containing amino acids in the nutrition systems of highly productive varieties of winter wheat. Methods. Field studies, biochemical technique, analytical procedure, statistical evalua­tion. Results. In the process of investigations, sufficiently high activity of fertilizers containing amino acids was established when applying them for leaf-feeding. Fertilizers based on algae (Megafol, Megafol Protein, Terra-Sorb foliar) and animal (Izabion) hydrolysates appeared to be very effective for increasing yield of culture. It was found that in case of low doses of mineral nitrogen, fertilizers helped to increase both the yield and quality indicators of high-yielding wheat variety. Conclusions. It was defined that fertilizers that include amino acids are highly effective compositions containing plant-available nitrogen in organic form and can be promising for application as antistress agents and improving efficiency of macro- and microelements use by cultivated plants. They are essential components of modern technologies for cultivation of highly productive varieties and hybrids in crop production of Ukraine.

Purpose. Considering ways to solve issues related to soil cover study at the institutions for plant varieties examination. Methods.Fieldandanalytical ones. Results. Issues are identified that arise during soil sampling at institutions for plant varieties examination within the state system of plant varieties protection. The author considered in detail the current soil sampling techniques for agrochemical tes­ting for humus, nitrogen (compounds to be easily hydrolyzed), mobile P2O5, exchangeable K2O, hydrolytic acidity and others. Attention was paid to violation of methodological requirements concerning the time of soil sampling and number of samples for agrochemical testing at the experimental field, to the lack of devices for meteorological observation and appliances for soil and leaf diagnostics. The article also touches upon the issues associated with the study of soil cover at fields with scientifically-based crop rotation that belong to institutions for plant varieties examination within the state system of plant varieties protection. Conclusions. It should be necessary to follow recommended practice when sampling at elementary sites for agrochemical testing and performing all operations in accordance with crop cultivation flowcharts. General recommendations for agrochemical testing of fields in case of conventional crop rotations in farms are not suitable for fields with scientifically-based crop rotations at institutions for plant varieties examination.

The article offers results of genetic value assessment for pollinators resulted from population of high-productive and sugary specialization of Uladivska breeding, to be used for their recurrent improvement and development of hybridization components valuable for combining in creation of synthetics and MS hybrids of sugar beet containing reduced amount of nitrogen α-amin ions.

The article describes Agro-ecological features of winter triticale variety Vivate Nosivskyi developed by means of individual selection based on hybrid combination ([Avgusto x NE 312] x К 9844) at the Examination Facility of Nosivska Breeding and Testing Station ofChernigivIAPPIAAN and selected by quantitative (grain productivity, quantity and weight of grains per ear, cup weight of grain, 1000 kernels weight), qualitative (protein contain, «raw» gluten) parameters of grain yield, by adaptability to a range of causative agents, abnormal events in winter-spring and summer, lodging. It shows that bio-agents of microbe preparations Azospirillum brasilense и Achromobacter album 1122 on initial stages of development of winter triticale variety Vivate Nosivskyi plants enhance nitrogen and phosphor nutrition as reflected in raw and dry weight of plants increased by 1,5 to 2,5 times, area of leaf surface - 2 to 2,4 times, grain yield -1,1-1,3 times.