The increase in the cereal spike crops yield capacity under the current change of the climatic conditions in Ukraine will have a positive tendency in the nearest future, but the sustainable grain production under sharp weather fluctuations is possible only with the improvement of the agro-technological systems. The pre-sowing seed treatment with chemical synthesis pesticides remains the main method in the agricultural industry today. However, the pesticides inevitably have a negative influence on the ecosystem of any level. A more environmentally friendly method of seed treatment under the intensive technology is the combination of the microwave seed irradiation and seed incrustation with the plant growth regulators that provide an increase in the cereal crops yield capacity up to 15–20 %. It is possible to reduce the negative influence of chemical measures on the quality of the cereal crops seeds by using for the seed treatment a mixture of a treatment agent with the preparations having the stimulating properties. The most promising among all physical methods of the pre-sowing seed treatment is the microwave technology which suppresses the entire complex of the seed infection and can become an alternative to the chemical method of plant protection. The universal character and practical importance of MW technologies in combination with the growth regulating substances consist not only in the increase in the yield capacity of the field crops, but also in reducing the technogenic load on the environment. The peculiarity of EMF of EHF application in the agricultural production is the necessity to take into account the specific electro-physical, technological and biological properties of the crops, which high heterogeneity greatly influences the action of the electromagnetic energy and the final result.

The increase in the yield capacity of cereal spike crops under the current change of the climatic conditions in Ukraine will have a positive tendency in the nearest future. However, sustainable grain production under sharp weather fluctuations is possible only with the agro-technological systems' improvement. The pre-sowing seed treatment with chemical synthesis pesticides remains the primary method in the agricultural industry today. However, pesticides inevitably have a negative influence on the ecosystem of any level. A more environmentally friendly seed treatment method under the intensive technology is the combination of microwave seed irradiation and seed incrustation with the plant growth regulators that increase the cereal crops' yield capacity up to 15–20 %. It is possible to reduce the negative influence of chemical measures on the quality of the cereal crops seeds by using for the seed treatment a mixture of a treatment agent with the preparations having the stimulating properties. The most promising among all physical methods of the pre-sowing seed treatment is the microwave technology, which suppresses the entire complex of the seed infection and can become an alternative to the chemical method of plant protection. The universal character and practical importance of MW technologies combined with the growth-regulating substances consist not only in the increase in the yield capacity of the field crops but also in reducing the technogenic load on the environment. The peculiarity of EMF of EHF application in agricultural production is the necessity to consider the crops' specific electro-physical, technological, and biological properties. High heterogeneity greatly influences the electromagnetic action energy and the final result.

This article is an interdisciplinary study that aims to form a comprehensive view of music and church singing both in the educational process of collegium students and outside it. Thanks to the historical sources involved, we were able to clarify the mechanism of functioning of church singing both in the collegium and at the stage of primary (preparatory) education of future students, as well as its role in the life of collegium graduates who made careers in the major vocal chapel of the Russian Empire. The preparatory stage for the future students was studying in parish schools, where an obligatory discipline was irmoloinyi singing. It is probable that in the 18th century, the teaching of singing in the collegium was carried out in the primary classes, where Church Slavonic literacy was studied at the same time, and in the first years of the 19th century musical singing was officially reflected in the name of a separate class. All students of the collegium underwent compulsory liturgical singing practice. The most gifted of the students were members of the Episcopal Cathedral Vocal Chapel. The students of the collegium were not limited to singing only in the cathedral; they also sang during the festive processions, during the begging, as well as in the parish churches during the holidays, where they also taught church singing. Among the music books, we know for sure about several Irmologions that were used in the collegium. From the memoirs of an eyewitness of the first third of the 19th century, we learn about the singing of hymns during public exams, as well as the singing of vocal concerts during the traditional holiday greetings to the Bishop, Rector, and Prefect of the seminary. It was noted that this tradition existed in the last quarter of the 18th century. Such a practice did exist at the same time in Kyiv-Mohyla Academy, so this evidence seems plausible. The only evidence of the use of musical instruments among the students of the Pereyaslav Collegium comes from the descriptions of the May recreational festivities, when both vocal and instrumental ensembles from among the pupils were heard.

We analyzed various sources of scientific literature and our data at the experimental field of the National Academy of Agrarian Sciences Plant Growing Institute named after V.Ya. Yuryev within 2010-2013. The irradiation of winter wheat and spring barley seeds with the electromagnetic fields of the extremely high frequencies (MWF of EHF) was carried out with the help of the equipment of the Kharkiv Technical University of Radio Electronics. The treatment of seeds with the microwave oscillations of the extremely high frequency electromagnetic field (MWF of EHF) that is widely used for the operation of many radio and home microwave devices was done at the frequency range of 2.5-3.4 GHz, at the power of 0.9-1.8 kW for 5-95 seconds per 1 kg of seeds. The sowing quality of the seeds before and after treatment was determined in accordance with the current State Standard of Ukraine 4138-2002 in the laboratory of the seed production and seed science of the Plant Growing Institute named after V.Ya. Yuryev. The field experiments were performed in the crop rotation laboratory of the seed production and seed science. Pea for grain was sown before spring barley and the black fallow preceded winter wheat. During the experiments the area of the studied plot was 20 m2, the recurrence was four-times, and the placement of the plots were systemic.We suggested the optimum regimes of seeds irradiation with the microwave field of an extremely high frequency (MWF of EHF). They should be at range of 2.4-3.4 GHz with the power consumption of 0.9 kW per 1 kg of seed and at exposure of 45 seconds of 1.8 kW per 1 kg of seeds and exposure of 15-20 seconds. Such regimes cause the increased energy of germination, seeds sprouting, and crop capacity. We proposed to use this solution for improving and increasing the ecological features of winter wheat and spring barley by using the presowing microwave irradiation of seeds instead of chemical treatment. We considered the complex presowing treatment of seeds with MWF of EHF in combination with the plant growth regulators should be adopted and further enhanced.

The proposed article is based on the corpus of historical sources of the 18th century and is devoted to the study of the singers of bishops of Pereyaslav. We found documentary evidence of the singers in 9 of the 14 bishops of Pereyaslav. According to the traditional order at the episcopal cathedrals of the Hetmanate, during the services, only the monks (kryloshany) sang. This tradition can be eloquently traced in the Pereyaslav Ascension Cathedral and other monasteries of the Pereyaslav eparchy during the 1720-1740s. The total number of singers in the cathedral monastery ranged from 5 to 9 people. At the head of the monks were two ustavnyky, who ruled the right and left choirs. And only in 1722, by a special decree, the Most Holy Governing Synod unified the rules, which primarily concerned the Ukrainian eparches. Since then, the order for the service of 10 singers has been established in the bishop's houses. Despite this, even before the decree was issued, vicar bishop Cyryl Szumlański was served by his own singers, led by the regent. The presence of the regent can be traced in the service of the next vicar bishop Joachim Strukov. Both the church monody and the polyphony sounded in the cathedral. We draw this conclusion from the available music books. Bishop Joakim Strukov in Pereyaslav owned the Heirmologia with musical notation, and in the time of Bishop Arseniy Berlo in the cathedral the musical-theoretical treatise of Mikołaj Dilecki "Musical Grammar" was rewritten. On the cover of this manuscript it was stated that one day a solemn partesnyi concert was performed. In connection with the last musical manuscript, the bishop's intention to introduce and consolidate innovations in the field of music education can be traced, when the aim of the students was to master the art of partes singing at a qualitatively better level. In addition to the above, this thesis is confirmed by information from the life of the singer of one of the previous bishops, when the teaching of partes singing took place outside Pereyaslav. The bishops' singers were called "pivchi" in authentic terminology, which we see both in documents from the archives of the Most Holy Governing Synod in St. Petersburg and in local documents from Pereyaslav. Beginning with the act sources of 1760 and at least until 1782, the group of bishop's singers was called "vocal music". During the same period, there is another name for this vocal group, which was used for internal use - "pivcha", which probably meant primarily a separate room where the singers lived. The choir was financed, first of all, from the bishop's treasury. And the singers received additional income by collecting money from the parishioners in a "singing mug", a special container for donations. According to expenditure sources, the funds received went to sewing, repairs, as well as the purchase of clothing and footwear. Among the information found in the sources about the singers, the total number of which reaches 29 names, not counting the mentioned singers without names and monks, we find representatives of various social stratum - children of clergy, Cossacks, burghers, commoners. For many of them, singing in the cathedral choir was not only an opportunity to earn a steady income, but also served as a springboard for career growth, for the rank of priest, or a place as a singer in one of the imperial capital choirs. In the second half of the 18th century there is a certain pattern, when most singers were disadvantaged, mostly orphans. In the life of the Pereyaslav bishops there were contacts with secular musicians-instrumentalists. In the 1720s, a bandura player served to vicar bishop Joachim Strukov. In the early 1780s, Hilarion Kondratkovskyi used the services of military musicians for solemn greetings during church holidays.