AGRICULTURALMANAGEMENT
The purpose of the study is to analyze the market of vegetable products and identify factors that negatively affect the development of vegetable growing. The analysis of vegetable production showed that the share of production of commercial vegetables in Russia is about half the capacity of the domestic market. Despite unfavorable conditions in 17 subjects of the Federation and the decrease in the vegetable field, the gross harvest of vegetables remained at the level of 2016. in the current foreign economic conditions, self-sufficiency in food is a priority. The main reasons for the lack of Russian vegetables in the market are highlighted. In order to ensure the consumption of vegetable products according to the standards recommended by the World Health Organization and the Ministry of Health of the Russian Federation, it is advisable to provide for the creation of large-scale vegetable production, including organic vegetable growing, within the framework of a private-state partnership with a state share of more than 50% to ensure state needs and necessary reserves; for the acquisition of resourcetechnical products in the implementation of the project program in the areas of large-scale vegetable-growing, organize branches of Rosagroleasing; extend the roadmap to promote import substitution until 2025 and other.
BREEDING AND SEED PRODUCTION OF AGRICULTURAL CROPS
The main direction in the selection of sweet peppers is the creation of hybrids with a high heterosis effect. The question of components choice for the greatest effect in crossings is studied by breeders and geneticists of many countries for a long time. However, until now it has not been possible to create a theory that allows breeders conducting practical work to consciously and reliably choose pairs that would provide maxi-mum and stable yield and product quality, depending on the purpose of the variety. In the work various principles of the selection of pairs were used: ecological-geographical, according to the components of attributes and selection of the maternal form. Using these methods, more than 300 combinations of crosses were obtained. It is shown that the combination of two ecologically different parental components of different origin - the local sample and the introduced one - leads to an increase in the heterosis effect. The best hybrid combinations with a complex of economically valuable traits are obtained by crossing local varieties with selected breeding lines. When selecting pairs according to the components of the signs, where local or introduced samples with a different set of features were taken as parental forms, productivity was at the level of the standard. In most cases, when used as the maternal form of the local variety, the productivity of the hybrids was significantly higher compared to the reverse crossing. As a result of our studies, it is once again confirmed and proved that the more differences in the places of cultivation and reproduction of parental components, the higher the heterosis effect and the effect of the maternal component is much higher.
A promising direction in the elite seed growing flower seeds is to create a population with the given ratios decorative signs and, above all, painting flowers (racemes), which has a wide range of variability. Maintaining constant these crosspollination populations can be performed using different selection methods (mass, individual, inbreeding). The aim of this research was to develop methods of elite seed-growing population for Carnation Turkish. Source material served as seeds superdwarf population "Early Dwarf Mixed", derived from FSBSI "All-Russian Research Institute of Medicinal and Aromatic Plants». Research conducted on plots FSBSI «Federal Scientific Vegetable Center». After the population has been designed for maintaining constant these traits in subsequent reproductions. As a result of breeding work has created a new different colour population entitled "Rainbow". When analyzing the cleavage "tag coloring flower" in population "Rainbow" Carnation Turkish within a few reproductions, it was found that: the range of variability of coloring a flower includes 5 major groups - pink, rose, red, salmon, white; red colour is dominant towards pink and salmon, respectively; for coloring a flower meet at least 5 genes: one controls the general predecessor synthesis of Ant-pigments, 2 gene dominant responsibility for pink and red colour, and their recessive alleles for pink and salmon, respectively; 2 gene suppressors are the synthesis of Antpigments cyaniding and pelargonidin.
Research work was carried out at the Pridnestrovian research Institute of agriculture in 2014-2017 in film greenhouses (spring-summer and summer turnover) and in the open ground when grown in the spreading and on the trellis. Much attention was paid to the degree and nature of the manifestation of heterosis in F1 hybrids, which were estimated by early and total yield, yield of standard fruits, yield of gherkins. The standards were F1 hybrids: Zubrenok and Ajax. The purpose of the work is the selection of bee-pollinated hybrids of universal cucumber for protected and open ground. Created in the Transnistrian agricultural research Institute pollinated by bees hybrids of cucumber universal destination F1 Korolek, F1 Sverchok, F1 Viurok is characterized by a high yield of gherkins in both factions that is currently the most promising in the areas of plant breeding and seed production of hybrids and commercial production of cucumber. New bee-pollinated hybrids: F1 Korolek, F1 Sverchok, F1 Viurok pass state variety testing in the Republic of Moldova and entered in the Register of breeding achievements in Transdniestria in 2017.
A significant disadvantage of one-time seed fruit gatherings used in operations of seed farms is the usage of different-age fruits (unripe, overripe and of optimally mature) for extracting seeds, that respectively have seeds with different sowing features. Carrying out several sequential gatherings that have not yet reached the biological maturity of the seed fruits, and their subsequent storage, makes it possible to avoid these problems. Through the example the Lunnyi watermelon variety, the article presents the results of studying a new method of conducting seed production of polycarpous varieties of cucurbits crops, including carrying out of frequent seed fruit gatherings not in biological ripeness, but at the stage of technical maturity and subsequent storage of collected seed fruits seeds for some period until receiving by seeds of the high sowing features. It has been established that for the production of certified seeds of the Lunnyi watermelon variety, it is possible to collect 15-20-day-old fruits and store them for after-ripening purpose for 20 days before releasing (extracting) the seeds. The studied method allows to significantly increase the overall productivity of seed crops. Running the seed breeding of melons and gourds, which form a large number of fruits, based on frequent gatherings and subsequent storage of batches of seed fruits before seed extraction is very cost-effective and economically-viable, even despite a significant increase of the production cost by 30-40%. The method allows to increase the yield of seed material per area unit by 140-155% and to advance, first of all, the germination readiness of seeds to match the first class under the sowing features. On the basis of the conducted research, it was obtained a patent for the invention “Method of conducting seed production of polycarpous varieties of vegetables and cucurbits crops”.
The technique of creation and the characteristic of two draft lines of a tomato with functional male sterility (ps-2) are given. The results of the five-year (2014-2018) test of two medium early determinant F1 hybrids for open ground (F1 Orlik and F1 Ogonjok), based on draft sterile line 1324, are presented. New hybrids in total yield and yield of standard fruits are not inferior to the Dutch hybrids F1 Yaqui («Seminis») and F1 Asterix («Syngenta») zoned in Transnistria and Moldova. The fruits of the new hybrids are plum-shaped (index 1,3 units), medium size (weight 50-70 g), bright red, with a shiny surface without a green spot. Сhemical composition and the physico-mechanical properties of fresh fruit meet the requirements. The content of solids in the fruit-more than 5%, total sugars - more than 3%, acidity is medium, sugar-acid index-about 7 unit. The strength of the fruit is high: the crushing force is more than 7 kg, the specific resistance to crushing is more than 120 and 140 g / g of mass, the force to puncture the skin is more than 260 and 280 g / mm2 .
The traditional production of linear material and hybrids in the selection of red beet is a time-consuming, long-term process due to the two - year cycle of plant development, self-and cross-incompatibility, inbred depression. Significantly reduce the life cycle of the plant allows the vernalization at different stages of development, including during the "steckling". Cultivation of plants with the use of steckling culture in the selection of red beet has not yet found wide application and has not been studied enough, in this regard, in 2009-2018 on the basis of the Federal State Budgetary Scientific Institution “Federal Scientific Vegetable Center”. The material of the study was inbred offspring I1-5, which were studied in several series of independent experiments using different schemes of growing stecklings and roots (one-year and biennial cycles). It is shown that the use of culture of steckling and protected ground for breeding schemes to create lines of red beet is advisable, as it accelerates the process of evaluating the heterogeneity of inbred progenies for earliness, index, root, the manifestation of cytoplasmic sterility, and also allows you to get a wider range of different inbred forms due to the high variability in the offspring. The probability of a valuable fully-sterile ms-forms higher in the group of early maturing plants with a large mass stecklings and promising self-compatibility mf-lines - among small fractions of mid and late inbred offspring. The continuous use of steckling culture should be recommended only for the preliminary evaluation of breeding material on sign of cytoplasmic sterility, followed by the reproduction of selected promising inbred offspring in the open field ("halves method"), and at later stages of the breeding process as a rapid assessment of crossing combinations on sign of cytoplasmic sterility when checking mf-forms on the fixing ability. The alternation of the culture of stecklings with the traditional biennial cycle of culture in conjunction with the techniques of recurrent selection and use of different backgrounds (field, greenhouse), can improve the performance of the selection and get aligned according to the main economic-important signs of promising inbred offspring in a shorter period of time.
The object of research was samples and hybrid combinations of watermelon (Citrullus lanatus) of domestic and foreign selection, as well as samples from the collection of VIR. The aim of the work was to study and identify the source material of watermelon for use in the breeding process to create new varieties and hybrids of melons with a complex of economic and valuable characteristics and resistance to biotic and abiotic environmental factors. The essence of the experiments was reduced to the evaluation of the source material on the main features that meet the requirements for the performance of the breeding task. As a result of researches samples of a watermelon which are sources of economically valuable signs were allocated. The selection was carried out according to the yield, length of the growing season, taste and technological qualities of the fruit. Among the samples of watermelon yield was allocated 6 samples with a yield of 19.5 to 24.3 t / ha (standard 14.5 t/ha). Samples with dry matter content from 11.2 to 14.0% (standard 11.0-12.6%) were selected by taste. The length of the vegetation period in the isolated samples ranged from 68 to 72 days (standard 73 days). On the technological qualities of fruit stood out 5 samples, selected samples with an original shape and different color of fruit, bright color of the flesh. Conducted with stand-out samples of crossing allowed to select the best hybrid combinations, characterized by valuable economic characteristics. Thus, as a result of the study and selection of samples of watermelon in the collection nursery formed a working genetic collection for further use in the breeding process in the nursery hybridization obtained hybrid combinations that have the necessary features to create new varieties.
The paper presents the stages of creating bulbous forms between A. cepa L. and A. Vavilovii Pop. et Vved. through hybridization, in vitro embryo culture, backrossing, inbreeding and cross-breeding. As object of research were considered inbred progeny I1-5 from BC1-2F5 combinations of crossing of A. cepa x A. Vavilovii. The parent species A. cepa L. of the onion variety Odintsovets was the standard. In plants of the first year of vegetation studied signs: the color of dry scales of the bulb, the weight of the bulb, the index of the bulb shape and the number of leaves. Phytopathological assessment of onion plants for resistance to downy mildew (peronosporosis) was carried out. In the progeny of interspecies hybrids plants were aligned on the color of the bulb (yellow and brownish). The average weight of the bulb varied from 33.5 to 92.3 g in generations I1-5 from ВС1, and in generations I1-5 from ВС2 it varied from 22.1 to 93.6 g. plants of bulbous forms had a flat bulb (I=0.6-0.7). Only plants from the progeny I3 and I5 from BC2 formed rounded-flat bulbs (I=0,8-0,9). The number of leaves in bulbous plants in the progeny varied on average from 5.3 to 7.1 PCs. The score of peronosporosis was low and medium (0.5-1.0). Was selected form of inbred progenies of I1-5 from BC1-2 with a dense bulb is flat and round-flat shape, which combined a relatively high resistance to downy mildew with a mature bulb is capable of storing.
VEGETABLE PRODUCTION
The conflict has arisen between the production of “technical”, low quality tomato varieties in the interests of farmers and processers and the need of population accustomed to consumption of salad tomatoes in high quality, useful products. As far as now this conflict has not been settled. Tomatoes are among the most important year-round sources of vitamins С, В, В2, РР, А, Н, В9, pectines, valuable minerals and nutrients and also other compounds, especially the antioxidants lycopene and carotene, which determine healthy diet of humans and protect from many diseases. It is necessary to create the tomato varieties for each soil-climatic zone, which are adapted to specific environmental conditions of cultivation, thus maximizing the genetic and climatic potential of the crop. In non-chernozem zone of Russia, which is characterized by perhumidity but rather short vegetation period and insufficient sum of temperatures for such warm-weather crop as tomato, the plant breeders of Federal State-Financed research Institution, Federal Research Center of Vegetable Production “VNIISSOK” create primarily short-season and mi-season varieties, which are tolerant to the low temperatures, short-growth (tree-type and determinant bushes) with closely placed clusters, even ripening and resistant to shot holes.
The area of greenhouses in Dagestan currently exceeds 220 hectares, most of which were built over the past 5 years and are high-tech facilities. The aim of our research was to identify highly productive tomato hybrids for growing in winter green-houses and to study the characteristics of their growth and development in transitional turnover; determination of the optimal time for sowing seeds and planting tomato seedlings for transitional turnover; determination of the level of accumulation of nitrates in the fruits of tomato, depending on the varietal characteristics and growing conditions. Experimental work was carried out in the greenhouse farm LLC Agro-AS, located in the Novolaksky district, p. Novokuli (Novostroy) is a suburb of Makhachkala. It has been established that when growing a tomato under conditions of a transitional culture under specific light conditions, the most expedient are the dates: sowing seeds in the first half of August, planting plants in the green-house in the first and second decade of September. Growing tomato plants during this period allows the plants to enter into the fruiting phase earlier and thereby form a larger number of fruits of greater mass as compared with the later sowing and planting dates. The highest yields were distinguished hybrids: Tomimaru Mucho F1, Kyoto F1 (19.0 and 18.1 kg / m2 ). The profitability of the production of hybrids was 70-100%.
The article presents the results of studies of melon culture in the conditions of the Volgograd Zavolzhye. The purpose of scientific research was to determine the dependence of melon culture on the moisture content of crops for their further use in the development of the necessary agricultural practices to increase the yield of melon without reducing the quality of the fruit. Evaluation of the research results showed that the level of water availability of melon crops has a significant impact on the growth and development of plants. With an increase in total water consumption during the growing season by 18%, plants that are more powerful were obtained. During the formation and maturation of fruits, the length of the lashes is 17.2% more, the leaf area is 20.1% more with an increase in the total weight of the plant by 12.5%. The positive effect of the increased level of water availability of crops on the root system of melon plants was revealed. With the total water consumption of 2300 m3/ha, the root mass is 6.6% more than the moisture content of 1795 m3 /ha. The depth of the main mass of the roots is 1-3 cm deeper with an increased level of moisture, which contributes to a better use of available moisture by plants with the drying of the upper soil layer. Comparative evaluation of the yield of melon with different values of the total water in the vegetative period. The best results were obtained in the cultivation of melon with a moisture level of 2300 m3 / ha, where the total yield of 31.7% more than the level of moisture 1975 m3 / ha, with larger fruits, the average fruit weight of 1.1 kg more. Studies have determined the dependence of the biochemical parameters of melon fruits on the moisture content of crops. Despite the rather high quality of melon fruit, there was a decrease in dry matter and total sugar and an increase in vitamin "C"with an increased level of moisture.
The requirements for garlic powder enriched with selenium, dried by convective drying and homogenized, are established. Selenium-enriched vegetables have special healing properties and are of interest as a source of selenium. Garlic enriched with selenium is grown in a number of countries (including the USA, Sabinsa) and produced in the form of capsules, tablets and granules (BAA), as drugs that can protect against cardiovascular diseases and cancer. The technical conditions of dried garlic with a high content of selenium were studied and identified. Based on these indicators, a standard has been developed «Dried garlic with high content of selenium. Technical conditions». The standard was developed for the first time for the Russian Federation. Sodium selenate was applied to the soil with a total dose of 75 mg / m2 For drying, garlic bulbs in biological ripeness, standard and non-standard, without damage by diseases and pests were used. Cloves were peeled, ground, and dried in a drying cabinet at a temperature of 70°C to constant weight. The resulting material was homogenized, the powder was stored in tightly sealed plastic bags.
The cultivation of perennial onions may increase the availability of green leaves in the early spring period and reduce the problem of vitamin deficiency. Welsh onion (Allium fistulosum) is one of the most demanded crops of the perennial onion group both in commercial and household vegetable growing. This is quite low maintenance crop with a number of positive qualities and properties. The factor that constrains the spread of this crop and its most intensive introduction in commercial growing is the lack of varieties adapted to the growing conditions. The plant breeders of the Altai Region have made major efforts for collecting the source material of Welsh onion, studying it further and conducting the selection. As a result, the clones with economically valuable characters were selected from the candidate varieties. In 2016, the candidate variety No. 44 was submitted to the State Variety Testing, it went through the trials successfully, and was included in the State Register of Selection Achievements as Premyera variety. The variety is middle-ripening, the period from the mass regrowth of leaves to the beginning of economic life is 20-28 days. One of its main practical advantages is late formation of flower shoots (4-14 June), which makes it possible to extend the period of economic validity of landings. According to the results of tests, on average for three years, the new variety in marketable yield exceeds the standard Nezhnost with a onetime cleaning per year of sowing by 32.2% and with cuttings in perennial crops by 39.7%.
AGROCHEMISTRY
One of the urgent tasks at the present time is to obtain and widely use functional foods that have antioxidant and anticarcinogenic effects, which serve not only to meet human needs in proteins, fats, carbohydrates, micro - and macronutrients, but also contribute to the immune system, improve the heart and other human organs. For food plants, rich in antioxidant protection components, include perennial onions, from the variety of wild species which are in demand by modern medicine are only very few. The Republic of Komi is classified as the most uncomfortable territories for human habitation. In the flora of the Komi Republic there are three types of perennial bows – Allium angulosum L., A. schoenoprasum L. and A. strictum Schrad. The collection of the Botanical garden of the Institute of biology, Komi scientific center includes more than 150 species. Comparison of the chemical composition of four types of onions from the Botanical gardens of the Komi scientific center and Moscow state University (MSU) showed that the total content of flavonoids in onions, Komi scientific center of the BS is much higher, and the content of selenium is lower than in the same types of BS, Moscow state University. In samples of onions sticking out in the Republic of Tuva, the Republic of Buryatia, in the Altai Mountains, the Se content is also much higher than in regional species. The soils of the Komi Republic are depleted Se, however, as shown by our research, wild and cultivated species of the genus Allium, are batteries of this trace element. According to our calculations, the use of 100 g of fresh herbs of chives may meet up to 60% of the daily needs of the human body in ascorbic acid, up to 94% manganese, 20% copper, 12% zinc.
Preservation of tomatoes takes place by appropriate preparation of raw materials, packing in a container and sealing it with subsequent heat treatment. In the course of our studies on the suitability of new varieties for canning, we noted that all varieties reacted differently to heat treatment. For example, the forward variety, which has high taste qualities, had a sugar-acid index of 8,44, compared to 7,04-7,51 in other varieties, the tasting commission was estimated at 3,1-4,6 points, which is lower than other varieties, due to cracking of the skin of the fetus. After a year of storage, the sugar and acid index, depending on the variant, was 9,18-9,93, which indicates high taste qualities of the fruit. It was noted that the higher flavor qualities, regardless of the storage time, were in option 2. For the varieties Festive, Carat and Forward, the best was option 3. By the end of storage, it was 11,82 for the Festive variety, 10,51 for the variety Karat and 11,98 from Forward. According to the sugar-acid index of all the varieties studied, we distinguished Forward. We found that the sugar-acid index was higher than the taste, both before and after canning, in all varieties, indicating their high taste qualities. A higher score was given to variants 1 (control), 3 and 4. In variant 5, a sharper smell of garlic was noted.
The value of the root chicory is due to the unique chemical composition of its roots. Depending on the variety, place of growth and growing conditions of culture chicory roots contain 72.0-77.0% water, 1.0-1.2% protein, 0.1-0.3% fat, 1.0-6.0% sugar, 12.0-30% inulin, 1.3-1.8% fiber, 1.1-1.9% ash, 0.3-0.4% phosphorus, 1.3-1.4% potassium, 0.3-0.4% calcium. Chicory roots can serve as a raw material for the production of various products: coffee surrogate, alcohol, sugar substitute and inulin in its pure form. Depending on the type of final product, the processing industry has different requirements for the chemical composition of the root crops. Coffee-chicory industry makes demands of the high content of inulin in the roots as the main nutritional flavor substratum, the high content of glucoside of inhibin reporting chicory drink a specific coffee flavor and aroma, and low content of proteins. The sugar industry is interested in a high percentage of inulin and other soluble carbohydrates that are easily converted into sugars, and in a small content of intibin, which gives the product a bitter taste, as well as in a small amount of proteins that are the most malicious pathogens that complicate sugar extraction. In the production of pure inulin, the processing industry is primarily interested in ensuring that the content of this carbohydrate in the root crops is as high as possible. The alcohol industry is interested in a high content of soluble carbohydrates as the main source material for alcohol, in a high content of soluble proteins as a nutrient substrate for the development of yeast cultures in the fermentation of sugar and in a high content of phosphorus and potassium salts, also necessary for the successful reproduction of yeast. The article reflects the economic importance of root chicory as a raw material for the needs of different types of industry (coffee-cyclical, alcohol, sugar), depending on the content of different substances in the root crops. The chemical composition, dynamics of accumulation of substances during the growing season and their distribution in different parts of the root crop are reflected.
The bright yellow flowers are edible pumpkin - a good source of antioxidant compounds . The maximum level of hydroxycinnamic acids noted in the half parted flower . The remaining components were studied at the maximum in the unopened buds . By the beginning of the flower opens flavonoids and carotenoids concentration decreased gradually . In full disclosure of the flower phase of the content of these components increases again, but it did not reach the initial level. A similar, but less pronounced trend of the observed and chlorophyll .
PLANT PROTECTION
Considering of broad beans as an integral component of biological crop rotations, the presence of phytopathogenic, toxigenic, opportunistic, and allergenic microscopic fungi in soils under their different varieties should be examined. At the Botanical garden BelSU (Belgorod) on a natural infectious background were grown and studied of 16 different broad beans varieties. Were taking into account the indicators of frequency of occurrence and abundance of species, they determined the structures of soil mycocomplexes under different varieties. Analysis of the data showed that most micromycetes in the rhizosphere under bean varieties belonged to the Ascomycota division, which is part of it as 4th classes of Sordariomycetes, Dothideomycetes, Eurotiomycetes and Saccharomycetes. The species diversity of the soil mycobiota of steaming soil was characterized by 26 species, and under the studied bean varieties 57 species of fungi were identified. In the mycocomplex under varieties, species of different ranks of frequency of occurrence developed that were not noted in the paring soil: Alternaria tenuissima and Stemphyllium solani were rarely and accidentally found in the control soil, but they were not found in under the beans during budding – flowering. This can be explained by the fact that a different composition of exudates in the root zone of the soil under the plants contributes to the development of different types of microorganisms. In the complex of micromycetes under the beans, the share of toxigenic species increased by 2.5-29%, opportunistic species - by 1.3-31%, allergens - by 2-24% compared with the soaring soil. In the soil, an abundance of opportunistic and allergenic species capable of inducing mycoses and allergies in humans can be reduced by the broad bean varieties Aquadul, White large-fruited, Russian Black, Velena, Summer Resident, Leader, Optics, Pink Flamingo, Yankel Byala. After the cultivation of the beans the phytopathogenic species Ascochyta fabae, Clasdosporium herbarum, Fusarium graminearum, F. oxysporum var. orthoceras, F. oxysporum, F. solani and Ulocladium botrytis, remain in the soil and this fact must be considered when selecting the next crop in crop rotation.
The yield of vegetable peas in the conditions of the Omsk region is largely limited to the defeat of plants by a complex of diseases and damage by phytophages. The aim of the research was to study the collection of pea vegetable samples in Western Siberia and to identify among them the most resistant to Ascochyta. The object of research was 70 samples of vegetable peas from the collections of the Federal Scientific Vegetable Center, Odintsovo, Federal Research Centre All-Russian institute of plant genetic resources on the name of N.I. Vavilov (VIR), St. Petersburg, as well as obtained in the framework of cooperation with foreign breeding institutions. The experiments were conducted in the forest-steppe zone of the Omsk region in 2014-2017. As a result of the experiments, it was established that the defeat of peas by Ascochyta occurs annually, but with different intensity, depending on weather conditions. The maximum resistance of plants was observed in 2016 under conditions of severe drought (5.8 points on average), the minimum – in 2015 with moderately humid and warm weather (3.9 points on average). Late sowing contributes to a greater damage to plants by Ascochyta and reduced productivity. The relationship between resistance to Ascochyta and conditions characterizing heat and moisture supply is strong negative in the initial period of plant growth: with the CGT (r = -0.98 0.13), the amount of precipitation (r = -0.86 0.35), air temperature (r = -0,67 0,24); strong positive in the second half of the growing season: with SCC (r = 0.82 0.33), amount of precipitation (r = 0.68 0.35). Most of the samples during the research retained a high (29%) and medium (48%) resistance to Ascochyta. As a result of the collection's assessment, samples of vegetable peas resistant (7-8 points) to the pathogen were distinguished: B-1295 (к-8907, Bashkiria), Chinese (PRC), Terrace 888 (k-9376, Ukraine). These samples can be recommended as sources of resistance to Ascochyta for the selection of vegetable peas in Western Siberia.
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