MATHEMATICAL MODELING OF THE PROCESS OF FUMIGATION OF LEGUMINOUS SEEDS IN A DRUM-TYPE INSTALLATION

Intensification of post-harvest processing of leguminous crops is an urgent task for the enterprises of the agro-industrial complex. The improvement of the known methods of ensuring reliable pro-tection of leguminous crops from the effects of pathogenic microflora, quarantine insect pests is of particular interest for research. The most common method of disinfection of products is con-sidered fumigation - the elimination of insect pests and pathogens with a gas or vaporous toxic chemical. The article discusses the process of fumigation of leguminous crops by an ionized flow of an aerodisperse mixture in a drum-type installation, and also presents the results of mathemati-cal modeling of this process. The mathematical description of the proposed model of the fumiga-tion process was carried out using the Mathcad application package. The analytical study of the obtained mathematical model allowed us to establish a number of dependencies and patterns char-acterizing the course of the process of electrostatic fumigation of leguminous crops in the mode of constant mixing.

PRODUCTIVITY OF GRAIN PRODUCTION IN RUSSIA: TRENDS AND PROSPECTS

The purpose of this study is to assess and predict the factors of productivity of Russian grain production in the context of the ongoing territorial and sectoral structural changes. The research methodology includes a retrospective assessment of the production of major grain crops in the key grain-producing zones of the country. The identification of tendencies and trends was carried out using the methods of nonlinear dynamics. The time period of the study covers 1990-2020. Calculations show that, in Russia as a whole, by 2030 there will be a stable growth in the values of the yields of grain and leguminous crops. The maximum growth rate will be demonstrated by rye (1.9 times more than the average), buckwheat (1.5) and corn (1.3). Wheat and barley yields will grow at the average level. A significant part of the structure of grain production with growth trends will be wheat (winter and spring), as well as barley and corn for grain. The following federal districts will be the leading regions of Russia in grain production: Southern, Central, Povolzhsky, Siberian, North Caucasian. Russia has a enough margin of stability in the productivity of grain production. The growth trends of the main indicators of the productivity of grain production in Russia will continue: the gross harvest of grain and leguminous crops due to the factors of intensification of production has a reserve of 10.4 - 25.7 million tons in excess of the officially planned indicators by 2030. The extensive option of grain production (expansion of the sown area while maintaining the global growth rates of yield) is additionally estimated at 24.5 - 42.6 million tons of the planned values of strategic documents. An increase in demand for grain in the world market will lead to the strengthening of wheat in the structure of grain production in Russia, a sharp increase in specialized zones for the production of corn for grain

The Influence of foliar fertilization on different soybean genotypes

Soybean is one of the most important leguminous crops due to its high oil and protein content with a significant role in nutrition. Micronutrients for soybean growth and development are very important and foliar fertilization is used to overcome environmental stress and help soybean plants to fill their nutritive needs. The research was carried out in 2020 by the Soybean Breeding Laboratory from the Agricultural Research and Development Station in Turda, Romania. Foliar fertilization had both positive and negative effects for 1000-grain weight and yield however, quality traits do not seem to be influenced by applying supplement of microelements during the vegetation period. The research suggests that genotype is the determining factor in the efficiency of foliar fertilization. In this sense, the present experiment will continue to bring answers regarding the effects of foliar fertilizers on some soybean genotypes.

Accurate technologies of agricultural crops cultivation for organic farming

The article presents the results of many years of experiments on the development of energy-saving farming systems. Preference in crop rotations should be given to multi-depth combined treatments that provide high productivity and are characterized by high-energy efficiency. Data on the yield of grain and leguminous crops in a six-field grain crop rotation with constant dump and combined longline tillage shows that the yield of oats in the first year of rotation according to the experimental variants was the same and amounted to 3.60 t/ha. In the second year of winter wheat yield in the variant with longline tillage was by 0.20 t/ha more in comparison with a plow on row, in the third year the difference in yield of spring barley on options for primary processing amounted to 0.30 t/ha in favor of combined tiered processing, in the fourth year the yield of peas has also been found to 0.40 t/ha more, also on the option of combined longline processing in the fifth year of the rotation crop of winter triticale. The yield of oats was 0.30 t/ha higher, and in the sixth year the yield of oats was 0.40 t/ha higher on the variant of combined longline processing.

Devising the formulation and technology for baking buns from flour of composite mixtures and sugar beet

The composition of legumes and sugar beet contains a large number of useful mineral and vitamin substances. The use of composite flour from leguminous crops for the preparation of bakery products helps increase food and biochemical properties. The main objects of this research are chickpea flour, bean flour, dry sugar beet powder, and wheat flour of the first grade. The main problem is an insufficient amount of minerals and vitamins, so the purpose of this work is to enrich bakery products and replace sugar in the recipe with sugar beet powder. The results showed that composite flour and sugar beet increased calcium content by 13.54 mg/100 g, iron ‒ by 0.57 mg/100 g, potassium ‒ by 141.03 mg/100 g, phosphorus ‒ by 38.89 mg/100 g, vitamin A ‒ by 0.002 mg/100 g, vitamin B2 ‒ by 0.016 mg/100 g, vitamin E ‒ by 0.32 mg/100 g, and vitamin PP ‒ by 0.405 mg/100 g. Microbiological indicators meet the established norms and requirements; the amount of mesophilic aerobic and facultative-anaerobic microorganisms, yeast, and mold in the test bun was the least compared to the control sample. As a result, it was proved that the use of composite flour of leguminous crops contributes to an increase in the nutritional and biological values of bakery products, and the application of dried sugar beet powder makes it possible to completely exclude sugar from the formulation of the resulting product. Employing this technology and formulations for obtaining bakery products makes it possible to expand the range of bakery products, reduce the duration of the manufacturing process, improve the quality of finished products, increase labor productivity. That also contributes to the improvement of the socio-economic indicators of bakery and confectionery enterprises

Statistical model for evaluation of the impact of climatic conditions on the crops production: the regional aspects

The work examines the statistical model for evaluation of the impact of climatic conditions on the crops production in Ukraine. The conducted content analysis of academic literary sources enables to arrive at conclusion that the majority of Ukrainian scholars consider changes in climatic zones of Ukraine a positive trend for crops production. It must be emphasized, nonetheless, that the increase in natural heat provision for crops production against the backdrop of a significant reduction in average annual precipitation considerably diminishes the sizes of cultivated and harvested areas, gross yield and overall crop yield of basic crops and perennial plantings. To perform calculations on key statistical indicators of crops production the following tools have been employed: methods of analysis of absolute, relative and average values; methods of elaboration and study of groupings; methods of analysis of the structure of statistical populations; methods of cross-impact analysis of indicators; methods of trend studies. The analysis concerned the dynamics of change in statistical indicators of crops production in Kherson oblast over the period of 1990–2019: gross yield of cereal and leguminous crops; total harvesting area of cereal and leguminous crops; wheat yields; cereal and leguminous crops production per capita. Periods of diverse degrees of occurrence of atmospheric precipitation in Kherson oblast according to the level of liquid saturation have been grouped: dry, medium, humid. It has been proved that winter wheat yields are affected by the following factors: size of the cultivation area and average annual precipitation. It is established that the digitalization of the agriculture contributes to the decrease in pressure on land and water resources, provision of conditions for “clean”, sustainable and eco-friendly agricultural products, increase in gross yield of crops, provision of conditions for efficient use of resources, capability of Big Data processing. Prospects for further research lie in elaboration of a multi-factor non-linear modeling of winter wheat yield with account for the factors of humus and soil pH; average annual atmospheric temperature, etc.

The effects of tea plants-soybean intercropping on the secondary metabolites of tea plants by metabolomics analysis

Background Intercropping, especially with legumes, as a productive and sustainable system, can promote plants growth and improves the soil quality than the sole crop, is an essential cultivation pattern in modern agricultural systems. However, the metabolic changes of secondary metabolites and the growth in tea plants during the processing of intercropping with soybean have not been fully analyzed. Results The secondary metabolomic of the tea plants were significant influence with intercropping soybean during the different growth stages. Especially in the profuse flowering stage of intercropping soybean, the biosynthesis of amino acids was significantly impacted, and the flavonoid biosynthesis, the flavone and flavonol biosynthesis also were changed. And the expression of metabolites associated with amino acids metabolism, particularly glutamate, glutamine, lysine and arginine were up-regulated, while the expression of the sucrose and D-Glucose-6P were down-regulated. Furthermore, the chlorophyll photosynthetic parameters and the photosynthetic activity of tea plants were higher in the tea plants-soybean intercropping system. Conclusions These results strengthen our understanding of the metabolic mechanisms in tea plant’s secondary metabolites under the tea plants-soybean intercropping system and demonstrate that the intercropping system of leguminous crops is greatly potential to improve tea quality. These may provide the basis for reducing the application of nitrogen fertilizer and improve the ecosystem in tea plantations.

Effect of Pesticide and Humic Preparation on the Soil Structure during Pea and Chickpea Cultivation

The article presents the results of a 3-year experiment to study the soil structure with the combined use of insecticides and a humic preparation. Crops were peas (Pisum sativum) and chickpeas (Cicer arietinum). The experiment was carried out in 2019–2021 at the experimental fields of the Federal Rostov Agrarian Scientific Center, located in the Rostov region in the south of the European part of Russia (47°21′ N, 39°52′ E). Soil was Calcic Chernozem Loamic. The studies were carried out both without fertilization and with the use of mineral fertilizers (N40P40K40). Sowings of leguminous crops were treated with a mixture of insecticides and a humic preparation in the phase of bean formation. The humic preparation BIO-Don10 was obtained according to the authors’ technology by alkaline extraction from vermicompost—a product of manure processing by compost worms of the Eisenia foetida species. The preparation contains salts of humic acids and fulvic acids in the amount of 1.9 g/L; the concentration in the mixture with the insecticide was 0.002%. An increase in the structure and water resistance coefficients was observed. A decrease in the block fraction and an increase in the total number of agronomically valuable aggregates were substantiated. It was found that in the cultivation of legumes, the application of mineral fertilizers had a negative effect on the structure of the soil, while, when using pesticides, the structure was preserved better by the end of the growing season. The revealed patterns can be associated with the activity of microorganisms participating in the hydrolysis of organic compounds that stabilize soil aggregates.

Comparative Efficacy of Leguminous Intercrops and Weed Management Practices on Nutrient Uptake, Productivity and Profitability of Maize based Intercropping System

Background: Presently, labour force is diminishing and becoming costlier. In agriculture management of weeds in cropped field has become a real challenge to the farmers, since weeds are affecting the crop yields due to competition for growth resources. Intercropping of leguminous crops and application of pre-emergence herbicides offers an ample scope for weed control. Methods: The present study was conducted at University of Agricultural Sciences, Bengaluru during 2016 and 2017 on red sandy loam soil and the experiment was laid out in randomized complete block design (RCBD) with factorial concept and replicated thrice. There were 15 treatment combinations involving three intercrops and five weed management treatments. Result: The results revealed that intercropping of maize with cowpea has recorded significantly higher grain yield (5842 kg/ha), stover yield (7035 kg/ha) and total nutrients uptake (99.53, 27.37, 96.95 kg/ha NPK, respectively). Among the chemical weed management practices, pre-emergence application of pendimethalin 30% EC @ 1.50 kg a.i./ha has recorded significantly higher grain (6589 kg/ha), stover yield (8033 kg/ha), maize equivalent yield (8860 kg/ha), total nutrients uptake (112.81, 31.05, 109.88 kg/ha NPK, respectively) and B:C ratio (3.35) compared to other weed management practices.