Increase In Soybean Yield Research Articles

Role of soil liming in increasing crop yields in crop rotation

These studies were conducted on the effects of new converter slag fertilizer (complex mineral fertilizer, limestone, soil ameliorant) for land reclamation, provided by the Japanese agricultural chemical manufacturer, containing 37.3% of CaO and 18.0% of MgO, on two types of soil in the Amur Region (Russia). About 85% of arable land has a high acidity (pHKCl ≤ 5.5) in the region. Therefore, the need for the use of land reclamation in the region is high. Studies aimed to establish the effect of various doses of the slag fertilizer on the change in the acidity of brown forest and meadow chernozem-like (Amur prairie) soils, as well as increase the yield of soybean and wheat in crop rotation. The experimental scheme was tested in doses of the limestone from 1 to 4 t/ha on the background of nitrogen-phosphorus fertilizer. The application of studied mineral fertilizer ensured a decrease in soil acidity by 0.05-0.30 (pHKCl) units by increasing of exchangeable Ca2+ and Mg2+ ions in soil exchange complex. The result was an increase in soybean yield by 0.18-0.45 t/ha and an increase in seed quality. Based on the results, fertilizer was recommended in doses of 2 to 4 t/ha, depending on the type of soil.

Adding manure and zeolite to improve soil chemical properties and increase soybean yield

Increasing domestic soybean production is an important part of the effort to reduce reliance on imports. One potential area for improvement is developing soybean crops in Alfisols. Alfisols require intensive effort due to their poor soil chemical properties. Manure and zeolite were proposed as candidate materials that could be used to improve soil chemical properties to support plant growth and increase the productivity of cultivated land. The experiment was designed to study the addition of manure and zeolite on soil chemical properties of Alfisols and soybean yield. The experimental design was arranged in a factorial completely randomized block design with two factors—three rates of zeolite (Z0 = 0 t ha<sup>-1</sup>, Z1 = 2.5 t ha<sup>-1</sup> and Z2 = 5 t ha<sup>-1</sup>) and three manure variables (P0 = no manure, P1 = 5 t ha<sup>-1</sup> cow manure, and P2 = 5 t ha<sup>-1</sup> quail manure)—with three replications. The results showed that a combination of 5 t ha<sup>-1</sup> zeolite and cow manure increased soybean yield. However, zeolite 5 t ha<sup>-1</sup> resulted in the greatest improvement in soil chemical properties—the highest CEC, soil organic matter percentage, and pH.

Delayed maize leaf senescence increases the land equivalent ratio of maize soybean relay intercropping system

Abstract Different planting pattern affects the leaf senescence of maize under intercropping systems, which regulate the grain yield of maize plants. In this study, we observed that a narrow-wide-row planting pattern in maize soybean relay intercropping system (MS) improved the leaf greenness and green leaf area, delayed the leaf senescence process in maize and increased the photosynthetic rate of maize leaves during the reproductive stages of maize in MS. In a three-year field experiment, soybean was relay-intercropped with maize under different planting patterns (1M1S, “50 cm + 50 cm” 1-row of maize and 1-row of soybean with an equal row distance of 50 cm; and 2M2S, “40 cm + 160 cm” narrow-wide-row planting pattern, where 2-rows of maize were planted in narrow rows, and 2-rows of soybean were planted in wide rows, and 60 cm distance was maintained between the rows of maize and soybean) of MS, and both planting patterns of MS were compared with sole cropping systems of maize and soybean. Compared with 1M1S, planting pattern 2M2S significantly increased the number of green leaves (by 36%), leaf greenness (by 17%), and leaf nitrogen content (by 13%) at the dent stage (R5). The improved leaf nitrogen content in 2M2S at R5 significantly increased the green leaf area (by 16%, from 4170 cm2 plant−1 in 1M1S to 4960 cm2 plant−1 in 2M2S) of maize, indicating that leaf senescence of maize plants was delayed, which in turn significantly enhanced the photosynthetic rate of maize leaves at R5 by 57% in 2017, 75% in 2018 and 49% in 2019 than 1M1S. Overall, in 1M1S and 2M2S, relay-cropped maize produced 100%, and 89% of sole maize yield and relay-cropped soybean produced 27% and 66% of sole soybean yield, respectively. Importantly, compared to 1M1S, the decline of maize yield by 11% in 2M2S was compensated by a substantial increase in soybean yield by 147%, and 2M2S achieved the highest land equivalent ratio value of 1.54 compared to the land equivalent ratio value of 1.27 in 1M1S. Our results suggest that by selecting the appropriate planting pattern or stay-green maize hybrids, we can improve the land equivalent ratio of maize soybean relay intercropping system.

Brachiaria and Panicum maximum in an integrated crop–livestock system and a second-crop maize system in succession with soybean

AbstractOwing to its contribution to the maintenance of carbon stocks, soil nitrogen and nutrient cycling for subsequent crops, the integrated systems become increasingly important for agricultural conservation. Thus, the objective of this study was to evaluate the biomass production of and total nutrient in Brachiaria spp. and Panicum maximum forage grasses used as mulch and soybean yields in an integrated crop–livestock system and second-crop maize succession system. The treatments consisted of the following cropping systems: Xaraes palisadegrass intercropped with soybean, Congo grass intercropped with soybean, Mombaça guinea grass intercropped with soybean, Tamani guinea grass intercropped with soybean and a soybean/maize succession system. The forage grasses were established during the soybean R6–R7 stage. Compared with Congo grass, Xaraes palisadegrass, Mombaça guinea grass and Tamani guinea grass produced more biomass and equivalent amounts of fertilizer returned to the soil and resulted in greater nutrient cycling, indicating the benefits of these grasses for use as mulch in integrated production systems. Maize had a greater C/N ratio, but the forage grasses also exhibited high potential by protecting the soil until the end of the soybean development cycle. The use of an integrated crop–livestock system combined with a forage cropping system provided greater soil nutrient cycling than the maize cropping system did, which resulted in increased soybean yields, thus contributing to the sustainability of agricultural systems.

Cobalt and Molybdenum applicated via leaf in the growth vegetative and yield of soybean

Advanced agricultural techniques have considerably increased soybean yield, but have led to the depletion of micronutrients in soils without adequate replenishment and have a key role in the maintenance and / or attainment of high yields in the soybean crop. Thus, the objective of this work was to determine the soybean yield components as a function of different doses and times of application of Cobalt (Co) and Molybdenum (Mo) via leaf. The experiment was conducted at the Celeste Farm, in Vera - Mato Grosso. Two applications of Co and Mo were made in the culture with the following doses of 0, 50, 100, 150 and 300 mL, the first application occurred in the V5 stage (fourth fully developed trifoliate leaf), and the second application in R2 (flowering full). A cultivar BRS811CRR was used in 40 plots of 11.25 m². The following variables were evaluated: plant height, dry mass, one hundred grain mass, number of pods per plant, grains per pod and productivity. The agronomic characteristics of the plants were not altered by the application of molybdenum cobalt via leaf, in the different stages of development of the soybean crop.

The effect of soil deepening on soybean yield by using various sowing machines

The influence of agricultural methods and soil and climatic conditions on soybean cultivation in the southern regions of the Amur Region was researched. Schemes of two-factor experiments to study the effectiveness of deepening the arable layer of soil during crop cultivation in 2014–2016 included the following options. Factor A – tillage: autumn – disk plowing or cultivation; spring disk plowing or cultivation; summer – inter-row cultivation with or without para-plowing. The options were combined in different ways, whereby the option of soil tillage with a disc harrow in autumn and spring was taken as control. Factor B: sowing with seeders SZ-5.4 and SP-3.6 L with row spacing (options – 15, 45 and 60 cm) with various tillage systems. In 2017–2018 experiments were carried out according to the following schemes. Factor A – tillage: in autumn tillage depth at 0.12 m with a disc harrower PM-8; in spring, before sowing – at 0.10 m (cultivator Case Tiger Mate 225 – control); autumn – tillage depth at 0.28 m (cultivator Lemken Karat 9/400); spring, before sowing – at 0.10 m (Case Tiger Mate 225). Factor B – seeding units included Amazon DMC 9000 (control); Amazon DMC 1200, Case Pro Disk 500 AFS, John Deer 1890, Lemken Solitair 12, Horsch Pronto 9 DC, Tom’ 12, SP-3.6 L. Deep autumn cultivation, in contrast with disk plowing, ensures a more favorable waterair regime for plants and an increase in soybean yield. Seeding units Case Pro Disk 500 AFS, John Deer 1890, Amazon DMC 9000 and SP-3.6 L used in combination with Lemken Karat 9/400 + Case Tiger Mate 255 machines for deepening the arable layer provided an increase in soybean yield by 25.0–38.3% compared to soil tillage with discs. It is recommended to use wide-span seeding units for soybean cultivation in large and medium-sized farms in fields with subdued relief in accordance with high-intensity technology. It is advisable to use SP-3.6 L seeder with a seed shoe for organic crop production in small-scale agricultural enterprises.

Agronomic performance of cotton and soybean cultivated under different cover crops and lime and gypsum doses

Soil management with the use of lime and agricultural gypsum can influence the development and yield of cotton and soybean crops. The use of cover crops avoids soil degradation and ensures nutrient cycling on the soil surface. In most cultivated species, the application of lime and agricultural gypsum provides corrections in the sub-surface soil, keeping the nutrients available. This study aimed to (i) verify whether cotton and soybean cultivated in succession to cover crops affect its agronomic performance and (ii) evaluate the influence of lime and gypsum doses on the agronomic performance of these crops. Two experiments were performed. The first experiment consisted of cotton cultivated in the off-season, and the second, of soybean cultivated in the regular season. The experiment was carried out under three plant residues (Urochloa ruziziensis, Pennisetum glaucum, and fallow area), combined with lime and gypsum doses. The experiment consisted of a completely randomized block design with four replications. For the cotton crop, only the gypsum doses influenced the variables plant height, initial and final population, and yield. Cover crops did not influence the agronomic performance of cotton and soybeans. The increase of lime doses resulted in a linear increase in cotton and soybean yield. The highest gympsum dose improved the agronomic performance of cotton plants; however, it only influenced the height of soybean plants.

The results of production research on the influence of certain inoculants and methods of their application on yield and winter wheat yield

Аnnotation Purpose. Investigation of the influence of some microbial preparations and methods inoculations in time of seeds andtheir application in agroecosystems on soybean yield and combinations of domestic and foreign biological products on winter wheat yield. Methods. Microbiological, field, analytical and experimental. Results. It was found that bacterization of soybean seeds with nanocomposite complex bacterial preparation Nanoriz-1 most significantly increased soybean yield. A significant increase in soybean yield was also observed with the use of nanocomposite drug Nanoriz-2, which contained one strain of bacteria in the nanocomposite of bentonite–Bradyrhizobiumjaponicum634b (developed by the Institute of Natural Sciences of NASU). Under these conditions, soybean yields increased by 24.65 q/ha and 15.36 q/ha, in accordance. According to the comb technology of growing these plants, the studied inoculants caused the most noticeable stimulating effect on soybean yield of 28.17 q/ha and 14.71 q/ha, respectively. The use of the inoculant OPTIMIZE (Canada) in the usual technology provided an increase in yield of 10.57 q/ha. The best inoculants for winter wheat Artemis are a combination of a complex bacterial preparation Azogran (DK Zabolotny Institute of Microbiology and Virology NAS) and a foreign biological product Humifield (Germany) (yield increase compared to control 12.80 q/ha). Inoculation of seeds of winter wheat Capital Polymyxobacterin and Hetomic (ISMI APV) gives anincrease in yield compared to the control of 10.46 q/ha and 11.61 q/ha. Conclusions. As a result of industrial research on the effect of some inoculants and methods of their use on the yield of soybeans and winter wheat found that: 1) inoculation of soybean seeds of Ustya variety during sowing together with some inoculants, which containedbacteries with different strains, differenttitres, different chemical combinations, different chemical elements and different producers of preparations made it possible to determine the best inoculants, in particular inoculants made on the basis of interaction of highly efficient bacteria with nanoparticles ofbentonite clay mineral –Nanorиz-1 and Nanorиz-2, developed by the Institute of Microbiology and Virology D. K. Zabolotnogo NAS of Ukraine – which by conventional technology make it possible to obtain an increase in yield, compared with the control, respectively 24.65 q/ha and 15.36 q/ha, and inoculant OPTIMIZE (Canada) – 10.57 q/ha, and on the ridge technology with the direction of the ridges east – west and sowing in the southern side of the ridge Nanorиz-1 and Nanorиz-2, respectively, gave anincrease in yield of 28.17 q/ha and 14.71 q/ha; 2) the best inoculants (by inoculation of seeds in PNSh-5) for winter wheat Artemis are a combination of Azogran (Institute of Microbiology and Virology D. K. Zabolotnogo NAS of Ukraine) and foreign Humifield (Germany), yield increase of 12.80 q/ha. Inoculation of seeds of winter wheat Stolychna with Polymyxobacterin and Hetomik (Institute of Agricultural Microbiology and Agroindustrial Production of NAAS), in comparison with the control, makes it possible to obtain a yield increase of 10.46 q/ha and 11.61 q/ha, respectively. Keywords: different inoculants, methods of seed inoculation, device, soy, winter wheat, sowing, plant yield.

Soybean yield in the Matopiba region under climate changes

ABSTRACT The climatic conditions along the cycle are the main factors responsible for the final production of any crop. This study aimed to evaluate the current conditions and the effects of climate change scenarios on the yield of soybean grown in the Matopiba region, located between the states of Tocantins, south and northeast of Maranhão, south of Piauí and west of Bahia, Brazil. The AquaCrop model of FAO, version 5.0, was calibrated with data of 2014 and validated with those of 2016, using climate, soil and crop management parameters collected in two experimental campaigns conducted between June and October in 2014 and 2016 in Palmas, TO, Brazil. The performance of the model was evaluated using the following statistical indicators: prediction error (PE), coefficient of determination (R2), normalized root mean square error (NRMSE), Nash-Sutcliffe model efficiency coefficient (EF) and Willmott’s index of agreement (d). It was verified that the AquaCrop model underestimates soybean grain yield under severe water stress conditions throughout the growing cycle. The increase in CO2 concentration and in the air temperature, projected by the climate models HadGEM2-ES and MIROC5 under the scenario of stabilization (RCP 4.5) and the scenario of progression (RCP 8.5), have contributed to the increase in soybean yield by the end of this century.

The efficiency of rhizobia use in the soybean cultivation on chernozem of the Western Ciscaucasia

In the period of 2008-2014, we carried out the field experiments to evaluate the efficiency of soybean inoculation with Russian and foreign preparations of nodule bacteria on various subtypes of chernozem of the Western Ciscaucasia. All studied inoculants ensured an increase of soybean yield: on ordinary chernozem – on average, by 18.8 % (0.34 t/ha), on leached and typical chernozems – by 14.9 % (0.30 t/ha), on meadow chernozem of rice fields – by 59.1 % (1.04 t/ha). The protein content from inoculation increased by 1.7-1.9 %, in rice crop rotations – by 4.0-4.9 %. There was no significant difference in efficiency between Russian and foreign inoculants. In 2018-2019, in a field experiment on leached chernozem we established the varietal specificity by reaction to inoculation with various strains of rhizobia in new soybean varieties Bars and Irbis, confirming the expediency of selecting complementary pairs in the system soybean variety – rhizobia strain.

Adoption Determinants of Biofertilizer Technology for Soybean in Rainfed Area

The target of the Government of Indonesia (the GoI) for achieving soybean self-sufficiency in 2018-2020 makes some efforts for increasing soybean production requiring the increase of productivity, as well as harvest area, should be done. The rainfed area is an excellent potential for soybean cultivation area expansion in Indonesia. The area reaches 3.1 million ha in Indonesia with 413,000 ha are in South Sulawesi Province. It mostly does not use for soybean cultivation due to limited water availability. Cropping patterns in the rainfed area are paddy - fallow, paddy - corn, paddy - soybean, or paddy - mungbean depends on the water availability. The productivity of soybean in the rainfed area is around 1.5 t/ha, and it is expected to be increased in the range of 1.8-3.2 t/ha. Dissemination of biofertilizer technology for soybean in the rainfed area named “Biodetas” was conducted during the dry season of 2017 in Tompobulu Sub-district, Maros Regency, South Sulawesi Province. Components of “Biodetas” technology introduced include (1) the use of biofertilizer (Agrisoy), (2) the reducing of NPK fertilizer use, (3) the use of leaf fertilizer, as well as (4) the use of organic fertilizer. The dissemination scale was 40 ha then compared to 5 ha of the existing cultivation. Research aimed to determine factors affecting farmers to adopt the biofertilizer technology of “Biodetas”. Research used regression analyses using a binary logic model with the IBM SPSS Statistics 20 program. Variables used were farmers’ experience on soybean cultivation, formal education, the extent of soybean planting area, soybean production, income from soybean, rice, and other farming activities, as well as dummy variables for land ownership status, biofertilizer production inputs access, improved seed access, and higher production cost should be provided by farmers. The application of “Biodetas” was able to increase soybean yield to 2.7 t/ha, 71% higher compared to the existing technology that produced 1.6 t/ha soybean. It is economically feasible to be adopted by farmers with B/C ratio1.2. The determinant of technology adoption by farmers was the extent of the soybean planting area. The larger soybean planting area will accelerate the adoption of technology. It may be related to landowners’ economic capability to provide the necessary production inputs to obtain the optimal yield.

Weed interference and control in soybean, as affected by row spacing, in the transition zone of South West Nigeria

ABSTRACTWeed interference is a major factor attributed to the poor yields of soybean (Glycine max L.) in Nigeria. Field experiments were conducted to evaluate the effect of row spacing on weed interference and control in soybean. Fifty-centimeter row spacing (35 plants m−2) caused a significant reduction in weed density and dry matter, resulting in an increase in soybean grain yield compared with 75- (133 plants m−2) and 100-cm row spacing (146 plants m−2). Under season-long weed interference, weed density at 50-cm row spacing was 74–76% lower than that at 75-cm and 100-cm row spacing. Irrespective of row spacing, there was no yield reduction when weeds were allowed to grow until 3 weeks after sowing (WAS). However, weed growth until 6 WAS or longer resulted in a significant yield reduction. With 50-cm row spacing, soybean produced optimum yield (2180 kg ha−1) with as little as 6 weeks of weed-free period. However, optimum yield at 75-cm (1983 kg ha−1) and 100-cm (1833 kg ha−1) row spacing was produced with 9 weeks of weed-free period. Butachlor + hand hoeing reduced weed density and dry matter and provided additional yield benefit over three hand hoeings or sole application of butachlor when the crops were planted at 50-cm or 75-cm row spacing. However, at 100-cm row spacing, three hand hoeings provided the best weed control and highest grain yield. These results showed that narrow (50-cm) row spacing + butachlor + hand hoeing provided efficient weed control and the highest yield of soybean.

Evaluation of the effects of feeding glyphosate-tolerant soybeans (CP4 EPSPS) on the testis of male Sprague-Dawley rats

ABSTRACTGlyphosate tolerant soybeans represent a large portion of soybeans grown and fed to farm animals around the world. Despite their widespread use for many years, some have raised questions regarding their safety because the soybeans were genetically modified. The CP4 EPSPS gene which imparts resistance to topical application of the herbicide glyphosate was introduced into soybeans. Application of glyphosate to soybean fields will reduce weed pressure and increase soybean yield. To assess their safety on the rat reproduction system, male Sprague Dawley rats were fed either glyphosate-tolerant (GM) soybean (40-3-2) or near-isogenic, non-GM (A5403) (control) soybean meal. The processed soybean meal was added to formulated rodent diets at 20% (w/w) and fed to rats for 90 days. Some rats from the control group were separately administered mitomycin C for 40 days and served as positive controls in the sperm abnormality test. Body weights and behavior were monitored daily, serum enzymes and histologic and EM appearance of the testis, and sperm morphology were also examined. After 90 days of feeding, no adverse effects were observed in rats fed glyphosate-tolerant soybeans.

Dependence of Soybean Productivity on Ecological and Agrochemical Factors

The results of research into the efficiency of mineral and organic-and-mineral fertilization systems in a long-term, stationary five-field rotation, including soybean and grain crops, are analyzed as dependent on certain agro-ecological factors. The aim of this work was to study the effect of continuous application of mineral (annual N42Р48 per ha of the crop rotation area) and organic-and-mineral (annual N24Р30 + 4.8 t of manure per ha of the crop rotation area) fertilization systems on the productivity of soybean in the crop rotation. The subjects of research were the middle and early ripening varieties of this crop, sown after annual grasses (soybean and oats mixture) and spring wheat. The preceding crop, the variety, and the hydrothermal conditions in 1963–2017 were considered as agro-ecological factors. The highest yield was obtained when sowing soybean crops after wheat: throughout a number of years, the yield of 1.8–2.0 t ha–1 was by 16% more frequent in this case than when soybean was cultivated after annual grasses. The maximum increase against the reference (0.17 t ha–1) was obtained with long-term application of organic and mineral fertilizers to the soybean crop cultivated after wheat. In cold wet years, using such a system of fertilization ensured the plant’s resistance to adverse weather conditions as well as an increase in soybean yield by 0.18 t ha–1 against the reference. The following midseason soybean varieties were the most responsive to fertilization: their grain yield was 0.03–0.20 t ha–1 higher compared to the reference and the potential productivity was fulfilled 2–7% better.

Row spacing and weed management methods influences growth and yield of soybean (Glycine max (L.) Merr.)

Abstract Weed infestation is among the primary reasons for low yields of soybean in Nigeria and other parts of Sub Saharan Africa (SSA). Field trials were therefore carried out in 2016 and 2017 cropping seasons to evaluate the effect of row spacing and weed management methods on growth and yield of soybean. The use of 50 cm row spacing resulted in significant (P < 0.05) reduction in weed cover score, weed density and weed dry matter with subsequent increase in soybean growth and grain yield compared to 75 and 100 cm row spacings in both years. In addition, early weed control with probaben at 2.0 kg a.i (active ingredient) ha1 followed by (fb) supplementary hoe weeding (shw) at 6 weeks after sowing (WAS) suppressed weeds and increased soybean growth, which carried through to final dry matter and yield. Pre-emergence application of Probaben fb shw at 6 WAS gave the best weed control and resulted in significantly (P < 0.05) higher soybean grain yield compared to two and three hoe weedings or sole application of probaben under 50 and 75 cm inter-row spacing. However, three hoe weedings gave the best weed control and grain yield under 100 cm inter-row spacing. These results suggest that narrow row spacing of 50 cm and weed control by pre-emergence application of probaben fb shw will improve the productivity of soybean. Wide row spacing, however, required longer weed-free period and consequently multiple hoe weeding for optimum soybean yield.

Integration of lodging resistance QTL in soybean

Poor lodging resistance could limit increases in soybean yield. Previously, a considerable number of observations of quantitative trait loci (QTL) for lodging resistance have been reported by independent studies. The integration of these QTL into a consensus map will provide further evidence of their usefulness in soybean improvement. To improve informative QTL in soybean, a mapping population from a cross between the Harosoy and Clark cultivars, which inherit major U.S. soybean genetic backgrounds, was used along with previous mapping populations to identify QTL for lodging resistance. Together with 78 QTL for lodging collected from eighteen independent studies, a total of 88 QTL were projected onto the soybean consensus map. A total of 16 significant QTL clusters were observed; fourteen of them were confirmed in either two or more mapping populations or a single population subjected to different environmental conditions. Four QTL (one on chromosome 7 and three on 10) were newly identified in the present study. Further, meta-analysis was used to integrate QTL across different studies, resulting in two significant meta-QTL each on chromosomes 6 and 19. Our results provide deeper knowledge of valuable lodging resistance QTL in soybean, and these QTL could be used to increase lodging resistance.

Application of a Formulated Humic Product Can Increase Soybean Yield

Application of a Formulated Humic Product Can Increase Soybean Yield

Ploughing down harvest residues of preceding crops for the purpose of soybean yield improvement

Soybean yield depends on the choice of cultivar, soil fertility, cultivation practices, and weather conditions in different years. Ploughing down crop residues increases the content of soil organic matter, and thereby positively affects soil fertility. The use of crop residues as an energy source has been promoted in recent years. It would be wrong to refer to this as a renewable energy source as the removal of crop residues from agricultural fields reduces and ultimately damages soil fertility, which in turn leads to reduced yield and a crop residue decrease in the future. Due to the reduced application of manure and organic fertilisers, it is necessary to return crop residues to the soil to preserve soil structure and prevent soil fertility decline. The effect of ploughing down crop residues of preceding crops on soybean yield has been the focus of studies for eleven years. Ploughing down maize crop residues resulted in the soybean yield increase by about 11.69%, i.e. the annual yield increase ranged from 2.89% to 15.94%.

Modern fungicide Propulse 250 SE for protection of soybeans from the complex of phytopathogens

Purpose. To establish technical efficiency of fungicide Propuls 250 SE against a complex of soybean diseases (sclerotium, rust, phomopsis, septoriose, alternaria, gray rot, cercosporosis).Methods. Field, laboratory.Results. The technical efficiency of fungicide Propulse 250 SE which provides disease control of soybean crops has been investigated. Thus, at the Bila Tserkva Research Breeding Station, in the treatments with fungicide Propulse 250 SE, development of sclerotium was 4.5 times less intensive at the application rate of 0.8 L/ha and 5.7 times less intensive at the application rate of 1.0 L/ha, as compared to control. The spread of septoriose for the use of the formulation also decreased to 30.5–31.3% or 1.5 times, and the disease development was almost 4 times lower than in the control treatment (7.2–6.4% vs. 25.7%). It was noted that the use of Propulse 250 SE contributed to a decrease in the spread of rust by 7.1–7.9%, and decreased the disease development 5–6 times compared to control. The distribution of alternaria and cercosporosis was also lower than in the control 1.2 and 1.8 times, respectively, while the disease was reduced by 4 and 5 times, respectively. The efficiency of Propulse 250 SE on soybean was quite high and ranged from 100% (gray rot) to 75.1% (septoriose). In particular, the efficiency of the formulation against rust was 83.5%, cercosporosis 82.2%, sclerotium 82.5%, alternaria 80.1%, and septoriose 75.1%. Under the conditions of Veselyi Podil Research and Breeding Station, the use of fungicide Propulse 250 SE at the application rate of 1.0 L/ha reduced the occurrence of rust from 19.3 to 18.5%, and affection from 3.8 to 3.6%, septoriose from 30.6 to 27.2% and 7.1 to 6.4%, alternaria from 11.2 to 8.7% and 5.5 to 4.9%, cescosporosis from 19.3 to 15.5% and 5.2 to 3.8%, respectively, compared to the application rate of 0.8 1 L/ha. At the same time, it should be noted that the use of this fungicide completely removed the manifestation of damage by sclerotium, gray rot and other diseases, its efficiency ranged from 71.1 to 88.9%. It must be pointed out that the use of this fungicide completely removed the manifestation of sclerotium and gray rot and other diseases, its efficiency varied between 71.1 and 88.9%.Conclusions. Experimental studies indicate that the technical efficiency of the fungicidal Propulse 250 SE against the complex of soybean diseases on the average was as follows: sclerotium 88.2%, rust 81.5%, septoriose 73.3%, alternaria 73.8%, gray rot 100% and cercosporosis 79.0%. The high efficiency of fungicide Propulse 250 SE against the complex of soybean diseases has affected yield. Thus, the use of fungicide at both stations contributed to an increase in soybean yield by an average of 1.0–1.5 t/ha compared to control treatment.

English

The development of practices that maintain or increases soybean yield can increase the profitability of this crop. In this context, the use of microorganism-based products in crops has been extensively studied. Among the species, Bacillus amyloliquefaciens has shown significant potential for agronomic use due to its ability to control phytoparasitic microorganisms and its effects in promoting plant growth. The aim of this study is to evaluate the effects of B. amyloliquefaciens application on soybean. Fields experiments were conducted at four sites. The experimental design used was randomized block design, with six treatments and four replications. The treatments consisted of seed treatment with B. amyloliquefaciens strain MBI600 (Integral II SC)-based product at 2.5, 5, 10, 15 and 20 mL c.p. 100 kg-1 of seeds, plus a control without treatment. The variables evaluated were plant stand, phytotoxicity, plant height, root and shoot dry mass, number of nodules and crop yield. Increasing doses of the B. amyloliquefaciens-based product promote an increase in all variables related to crop development. All doses of the B. amyloliquefaciens-based product provided an increase in soybean yield compared to the control. The dose that produces the maximum agronomic efficiency was 15 mL c.p. 100 kg-1 of seeds.   Key words: Biological control, Bacillus subtilis, Glycine max, growth promoters, seed treatment.