Intensity Of Aggression Research Articles

Effect of Nozzle Hole Shape on Aggressive Intensity of a Cavitating Jet in Water with an Injection Pressure of 35MPa

Effect of Nozzle Hole Shape on Aggressive Intensity of a Cavitating Jet in Water with an Injection Pressure of 35MPa

Interspecific aggression and defence of extra nest sites in two species of songbirds

AbstractInterspecific competition is expected when two species share resource needs. For example, secondary cavity‐nesting birds may compete vigorously for suitable nest sites both within and among species. However, little is known of whether monogamous species defend more than one nest site on their territory after breeding has begun, and in particular whether they are aggressive against other species. Defending extra nest sites may be adaptive because they may be used for renesting after a failure or to produce a second brood. We studied interactions between a monogamous, resident bird, the great tit Parus major and a migrant, the pied flycatcher Ficedula hypoleuca, providing nest boxes in woodlands in Norway. Agonistic behaviours may be subtle and easily overlooked so we experimentally placed caged male pied flycatchers near nests of great tits and at a dyad of empty nest boxes erected in the territory 25 m away. We filmed interactions between species at 21 sites in the egg‐laying period of the tit, and at 26 nest sites during incubation. Male great tits showed aggression towards the caged flycatcher both at their own nest box and at the nest boxes erected at a distance. We manipulated the external appearance of the nest boxes with painted designs around the entrances but the intensity of aggression at the empty nest boxes did not depend on whether those boxes matched the nest box with the tit nest and was not correlated with tit clutch size. Neither was the intensity of display activity at each nest box by the flycatchers that settled associated with these variables. The results are discussed in relation to hypotheses for nest site choice involving interspecific social learning and aggression.

Circ_101341 Deteriorates the Progression of Clear Cell Renal Cell Carcinoma Through the miR- 411/EGLN3 Axis.

BackgroundClear cell renal cell carcinoma (ccRCC) is one of the main subtypes of renal cell carcinoma, with intense aggressiveness. The involvement of circular RNAs (circRNAs) in human cancers attracts much concern. The intention of this study was to investigate the expression of circ_101341 and explore its function in ccRCC.Materials and MethodsThe expression of circ_101341, miR-411 and Egl nine homolog 3 (EGLN3) was measured using quantitative real-time polymerase chain reaction (qRT-PCR). Cell proliferation was assessed by cell counting kit-8 (CCK-8) assay and colony formation assay. Cell migration and invasion were monitored by transwell assay. Xenograft model was established to explore the role of circ_101341 in vivo. The protein levels of E-cadherin (E-cad), N-cadherin (N-cad), matrix metalloprotein-9 (MMP9) and EGLN3 were detected by Western blot. Bioinformatic analysis was conducted using Circinteractome and starBase. The targeted relationship was verified using dual-luciferase reporter assay, RNA-binding protein immunoprecipitation (RIP) assay and RNA pull-down assay.ResultsThe expression of circ_101341 was elevated in ccRCC tissues and cells. Functionally, circ_101341 knockdown depleted proliferation, migration and invasion of ccRCC cells in vitro and restricted tumor growth in vivo. Circ_101341 directly targeted miR-411, and miR-411 inhibition revised the inhibitory effects of circ_101341 knockdown on proliferation, migration and invasion in ccRCC cells. Moreover, miR-411 directly bound to EGLN3, and EGLN3 overexpression also rescued the effects of circ_101341 knockdown.ConclusionCirc_101341 functioned as a tumor promoter to strengthen proliferation, migration and invasion by regulating EGLN3 via sponging miR-411, indicating that circ_101341 was a potential diagnostic and therapeutic biomarker of ccRCC.

7 Mixing aggression and floor type during gestation have implications for sow reproductive performance

Abstract Aggressive behavior resulting from mixing to establish a dominance hierarchy is a welfare concern for group-housed sows. The associated stress could negatively impact reproductive performance (RP). Objectives of this study were to investigate associations between 1) mixing aggression intensity and RP within and between parities one (P1) and two (P2), and 2) aggression intensity, floor type and RP. A total of 164 gilts were followed through two parities. Gilts were mixed into stable groups of eight unfamiliar individuals four days after insemination, and housed on fully-slatted floors, either uncovered (CON; n = 84) or covered (RUB; n = 80) by a rubber slat-mat until farrowing (for both parities). Skin lesion scores (SLS) (proxy for mixing aggression intensity), were recorded 24–72 hrs post-mixing (0 = no lesions to 5 = severe lesions) on five body regions on left and right sides, and on the tail, in both parities. Total SLS was calculated for each sow. RP data were retrospectively acquired from farm records for both parities. Data were analyzed using GLMM in PROC GLIMMIX of SAS (v9.4) where 1) each parity analyzed separately, and 2) SLS in P1 used to predict RP in P2. Gilts with higher SLS in P2 had higher piglet mortality (P = 0.021) and longer cycle length (P = 0.003) in P2. Gilts with higher SLS in P1 had more non-productive days (P < 0.001) in P2. CON gilts had higher SLS than RUB gilts (P = 0.017) in P1, but not in P2 (P > 0.05). CON gilts also had more piglets born dead (P = 0.004) and tended to crush more piglets (P = 0.097) in P2. Our results confirm that mixing aggression impacts RP in the current parity negatively. They also suggest that mixing aggression experienced by gilts may have long-term negative carry-over effects on performance in subsequent parities. Use of rubber flooring appears to mitigate detrimental effects of mixing aggression, perhaps through improved sow comfort.

PENGARUH CORPORATE SOCIAL RESPONSIBILITY, POLITICAL CONNECTION, CAPITAL INTENSITY DAN INVENTORY INTENSITY TERHADAP TAX AGGRESSIVENESS

This study examines the influence of Corporate Social Responsibility (CSR), Political Connection, Capital Intensity, Inventory Intensity of Tax Aggressiveness. Samples were selected using a purposive sampling method so as many as 33 companies in the Basic Industry and Chemical sectors as population, which are listed on the Indonesia Stock Exchange in the 2016-2018 period. The results of this study indicate that Capital Intensity positive affects on Tax Aggressiveness, which indicates that the higher the Capital Intensity, it is suspected that the company practices Tax Aggresiveness. The Corporate Social Responsibility and Political Connection variables show the resultys do not have a positive effect, which means that the higher the level of CSR disclosure and the companies that have Political Connection, the company allegedly did not practice Tax Aggresiveness. Inventory Intensity variable does not affect the Tax Aggressiveness which shows that the high or low value of Invetory Intensity does not affect the presence or absence of the company allededly practicing Tax Aggressiveness.

Luminescence intensity of vortex cavitation in a Venturi tube changing with cavitation number

Hydrodynamic cavitation in a Venturi tube produces luminescence, and the luminescence intensity reaches a maximum at a certain cavitation number, which is defined by upstream pressure, downstream pressure, and vapor pressure. The luminescence intensity of hydrodynamic cavitation can be enhanced by optimizing the downstream pressure at a constant upstream pressure condition. However, the reason why the luminescence intensity increases and then decreases with an increase in the downstream pressure remains unclear. In the present study, to clarify the mechanism of the change in the luminescence intensity with cavitation number, the luminescence produced by the hydrodynamic cavitation in a Venturi tube was measured, and the hydrodynamic cavitation was precisely observed using high-speed photography. The sound velocity in the cavitating flow field, which affects the aggressive intensity of the cavitation, was evaluated. The collapse of vortex cavitation was found to be closely related to the luminescence intensity of the hydrodynamic cavitation. A method to estimate the luminescence intensity of the hydrodynamic cavitation considering the sound velocity was developed, and it was demonstrated that the estimated luminescence intensity agrees well with the measured luminescence intensity.

Enhancing the Aggressive Intensity of a Cavitating Jet by Introducing Water Flow Holes and a Long Guide Pipe

Abstract It is known that the geometry of the nozzle has a great effect on the aggressive intensity of a cavitating jet. In previous reports, various nozzle geometries were proposed, and improvements made to the aggressive intensity were reported. However, no detailed description of the reasons why the aggressive intensity is improved by these various geometries was given. In this study, we conducted erosion tests on pure aluminum Japanese Industrial Standards JIS A1050P using 11 different nozzles with different geometries downstream from the throat outlet in order to understand the effects of the nozzle geometry on the aggressive intensity. In addition, in order to investigate the characteristics of the cavitating jet produced by each nozzle, measurements of the erosion areas, images of the cavitating jet using a high-speed video camera, and measurements of the impingement pressure of the cavitating jet were taken, and correlations between the parameters were obtained. It was found that the nozzle with the largest mass loss was a nozzle with water flow holes near to the throat outlet and a long guide pipe (LGP). The mass loss was 2.5 times that of the previously reported optimum geometry nozzle. Very high correlations were obtained between the mass loss, the inner diameter of the annular erosion area, the impingement pressure measured at the same standoff distance and the cavitation cloud lifetime. Based on these results and the images of the cavitating jets taken with the high-speed video camera, a new cavitating jet progression process is proposed.

Alcohol, Affect, and Aggression: An Investigation of Alcohol's Effects Following Ostracism.

Ostracism is distressing to those who experience it and people are motivated to find ways to cope, including self-medication or aggression. However, we know little about how alcohol intoxication may affect individuals' reactions to ostracism. This study investigates predictions informed by Alcohol Myopia Theory to observe how alcohol influences changes to one's affect, basic needs fulfillment, and aggression following ostracism. Participants (N = 97) were randomly assigned to either consume an alcohol, placebo, or nonalcohol beverage, and then participate in a game that simulated ostracism. Following this, participants engaged in a task wherein they were able to aggress against an ostensible ostracizer. Affect and basic psychological needs were measured at baseline, post-ostracism, and post-aggression timepoints. Results indicated that all groups reacted adversely to ostracism and experienced partial recovery toward baseline for negative and positive affect and basic psychological needs. Further, alcohol facilitated recovery across these outcomes post-aggression for participants who felt more intoxicated. Alcohol, relative to the control beverages, increased ostracizer-directed aggression intensity for low trait physically aggressive, but not highly aggressive, people. This randomized study provides novel preliminary evidence suggesting that alcohol enhances aggressive urges toward ostracizers in those who are not typically aggressive. Those who feel more drunk when intoxicated, compared to those who feel less so, may experience greater recovery from ostracism after aggressing toward an ostracizer hinting at potentially pleasurable effects that must be replicated in future studies.

Cavitating Jet: A Review

When a high-speed water jet is injected into water through a nozzle, cavitation is generated in the nozzle and/or shear layer around the jet. A jet with cavitation is called a “cavitating jet”. When the cavitating jet is injected into a surface, cavitation is collapsed, producing impacts. Although cavitation impacts are harmful to hydraulic machinery, impacts produced by cavitating jets are utilized for cleaning, drilling and cavitation peening, which is a mechanical surface treatment to improve the fatigue strength of metallic materials in the same way as shot peening. When a cavitating jet is optimized, the peening intensity of the cavitating jet is larger than that of water jet peening, in which water column impacts are used. In order to optimize the cavitating jet, an understanding of the instabilities of the cavitating jet is required. In the present review, the unsteady behavior of vortex cavitation is visualized, and key parameters such as injection pressure, cavitation number and sound velocity in cavitating flow field are discussed, then the estimation methods of the aggressive intensity of the jet are summarized.

Experimental Study of the Influence of Test Chamber Dimensions on Aggressive Intensity of the Cavitating Jet

Abstract The ASTM G134 standard, Standard Test Method for Erosion of Solid Materials by Cavitating Liquid Jet, provides specifications for assessing the material resistance to the cavitation erosion caused by submerged cavitating jet. Nevertheless, the influence of test chamber dimensions on cavitation erosion is not considered in such an international standard. To fill in the gap, nine test chambers with different chamber lengths and diameters were devised to facilitate a comparative investigation of the cavitation aggressive intensity. The cavitation number was fixed at 0.014. Aluminum (JIS A1070) and stainless steel (JIS SUS316L) specimens were used in the experiment. The results show that at the distance of 19 mm between the nozzle outlet section and the specimen surface, the most severe erosion is accomplished, which is shared by the nine test chambers. Both the mass loss and the erosion rate vary with the test chamber length and diameter. A long test chamber is associated with a low erosion rate. The coefficient of variation on the cumulative erosion rate is 12 %. As the chamber length equals the chamber diameter, the coefficient of variation is 3 %. At the test chamber length of 30 mm and diameter of 40 mm, the maximum erosion rate is higher than its counterparts. The present study provides important data for the ASTM G134 standard to decide the operation parameters and test chamber dimensions.

A Teleost Fish Model to Understand Hormonal Mechanisms of Non-breeding Territorial Behavior.

Aggressive behaviors occurring dissociated from the breeding season encourage the search of non-gonadal underlying regulatory mechanisms. Brain estrogen has been shown to be a key modulator of this behavior in bird and mammal species, and it remains to be understood if this is a common mechanism across vertebrates. This review focuses on the contributions of Gymnotus omarorum, the first teleost species in which estrogenic modulation of non-breeding aggression has been demonstrated. Gymnotus omarorum displays year-long aggression, which has been well characterized in the non-breeding season. In the natural habitat, territory size is independent of sex and determined by body size. During the breeding season, on the other hand, territory size no longer correlates to body size, but rather to circulating estrogens and gonadosomatic index in females, and 11-ketotestosterone in males. The hormonal mechanisms underlying non-breeding aggression have been explored in dyadic encounters in lab settings. Males and females display robust aggressive contests, whose outcome depends only on body size asymmetry. This agonistic behavior is independent of gonadal hormones and fast acting androgens. Nevertheless, it is dependent on fast acting estrogenic action, as acute aromatase blockers affect aggression engagement, intensity, and outcome. Transcriptomic profiling in the preoptic area region shows non-breeding individuals express aromatase and other steroidogenic enzyme transcripts. This teleost model reveals there is a role of brain estrogen in the control of non-breeding aggression which seems to be common among distant vertebrate species.

Noisy neighbours and myna problems: Interaction webs and aggression around tree hollows in urban habitats

Abstract Interaction networks among native and invasive species in a community can inform both invasion impacts and applied management of invasive species. The intensity of aggressive interactions may be related to the overlap in species’ ecological niche and functional traits, especially in cavity‐breeding species, that often compete for limited nesting sites. Australia is home to over 100 native and introduced cavity‐nesting species, including several invasive species that are widespread globally, such as the common myna Acridotheres tristis. Here, we aimed to test the extent to which shared functional traits inform the intensity of aggression between cavity‐nesting birds. We quantified the outcomes of aggressive interactions between birds in large hollow‐bearing trees in SE Queensland, Australia. We examined whether more similarly sized birds interacted more frequently, whether larger species won aggressive interactions more often, and whether cavity‐breeding species with similar preferences for nesting sites (breeding‐niche space) interacted more frequently. We recorded a total of 410 aggressive interactions and 48 interacting bird species around tree hollows, including 20 cavity‐nesting bird species. These interactions were dominated by the invasive common myna, the native noisy miner (a non‐cavity‐breeder) and the native rainbow lorikeet Trichoglossus moluccanus, but the common myna won the largest total number of interspecific interactions. On average, larger birds won aggressive interactions more frequently, yet there were some important exceptions to this finding; the common myna (113 ± 30 g) won 26 of the 29 interactions against the larger native rainbow lorikeet (126 ± 44 g). Importantly, species with more similar nest‐site preferences were observed aggressively interacting more frequently. Synthesis and applications. The impact of the invasive common myna was higher‐site preferences. Control efforts for the myna should focus on birds that nest in natural tree hollows. An analysis of shared traits by managers could be used to help identify how many local species would benefit from common myna control in a given area and test if further behavioural studies of common myna are warranted.

THE ROLE OF SCHOOL ARTISTIC ACTIVITIES IN MINIMISING AGGRESSION FOR PRIMARY SChOOL STUDENTS

This research seeks to prepare a program of school’s artistic activities that develops different new skills and experiences that help to vent negative emotions positively and expressing them in the form of artistic creativity that provides the student’s opportunity to benefit from his energy, ability and talent, which earns him self-confidence and responsibility towards himself and towards others and forming a positive concept of self that erases undesirable behaviors and alleviates the intensity of aggression among students. The research relied on the descriptive analytical approach in terms of it’s theoretical framework, where it dealt with a series of studies related to the subject of research as well as addressed (concept of artistic activities and their fields and objectives, school activity, the foundations of planning and evaluating activities, the role of art in modifying behavior, the role of artistic activities in the construction of personality Child, concept, causes and forms of aggression). The research also followed the semi-experimental approach in its practical aspect, which included the selection and application of Measure of aggressive behavior and statistical treatment of it, the selection of children who received high grades by scale, and the identification of the sample of the final study, which consisted of (20) children from the primary stage between the ages of 9-12 years, and the procedure of homogenization among the members of the sample, and the preparation of The program of artistic activities (artistic expression - stereoscopic expression), tribal, dimensional and tracking measurement, statistical processing of data, conclusions and discussion, presentation of educational recommendations and proposal of future research in this field

Aggressive Behaviour of Drosophila suzukii in Relation to Environmental and Social Factors

Aggression plays a crucial role in survival all across the animal kingdom. In this study, we investigate the aggressive behaviour of Drosophila suzukii, a known agricultural pest. Bioassays were performed between same sex pairs and the effect of environmental (food deprivation, sex, age and photophase) and social factors (non-social and social). Initially the inter-male and inter-female aggression was determined ethologically consisting of several behaviour patterns. Two hours starvation period increase locomotor activity of flies, promoting increased aggressive behaviour. Most of the behavioural patterns were common between males and females with a few sex-selective. Number of male encounters was higher in flies held in isolation than in those that had been reared with siblings whereas in case of females, only those that were isolated exhibited increased aggression. Females and males D. suzukii that were 4-day-old were more aggressive. In addition it is found that on the 3rd hour after the beginning of photophase, regardless of age, both males and females rise to high intensity aggression patterns.

Correction to: Low Resistance of Senior Resident Females Toward Female Immigration in Bonobos (Pan paniscus) at Wamba, Democratic Republic of the Congo

Female aggression against outgroup conspecifics is an important aspect of intergroup relationships among female primates. Intense aggression from resident females toward immigrant females suggests that the costs of intrasexual competition outweigh the benefits of group living and has been reported in some species with female transfer. In bonobos (Pan paniscus), however, immigrant females are likely to integrate smoothly into an unfamiliar group through affiliative interactions with specific older females. We hypothesized that older resident females gain an indirect benefit from female immigration by increased mating opportunities for their philopatric sons. We examined the effects of 1) age and tenure and 2) the presence of adolescent or adult sons on the probability of aggression by resident females against immigrant females. We collected 73 instances of dyadic agonistic interactions between 14 female bonobos at Wamba, Democratic Republic of the Congo, for five different periods between November 2014 and June 2018, which included four immigrant females with a group tenure of <2.5 years. The female dominance hierarchy correlated with age and tenure, the slope of the hierarchy was weak but statistically significant, and the hierarchy was not linear. We found that the rate of aggression against immigrant females decreased with age in resident females but was unrelated to the presence of mature sons. Our findings suggest that the cost imposed by female immigration varies among resident females, and that social tolerance to immigrant females may be associated with low feeding competition rather than any future benefits.

Impacts of Intergroup Interactions on Intragroup Behavioral Changes in Javan Gibbons (Hylobates moloch)

Agonistic intergroup interactions can cause individual costs such as physical injuries, increased physiological stress, and disrupted intragroup social relationships. Therefore, individuals should employ behavioral strategies to minimize the cost associated with aggressive intergroup encounters (IGEs). We investigated the behavioral strategies of territorial, pair-living Javan gibbons (Hylobates moloch) in response to intergroup aggression, including 1) changes in activity budgets, 2) affiliative behaviors within pairs, and 3) potential intergroup avoidance strategies, such as sleeping tree selection. We observed 129 encounters in three habituated gibbon groups surrounded by four unhabituated groups in Gunung Halimun-Salak National Park, Java, from 2014 to 2016. Overall, gibbons significantly altered their activity budgets during IGEs: they foraged less and were less active than when there was no encounter. We also found a decrease in grooming within pairs following IGEs compared to a matched-control period. However, we did not find any effects of the intensity of aggression, outcome, length of, or female participation in IGEs on grooming within pairs in the hour after an encounter. Male gibbons slept farther away from the IGE location after aggressive IGEs than after neutral encounters. Our results suggest that not only primates living in large groups but also primates living in small groups, such as Javan gibbons, may develop behavioral strategies to deal with direct (during encounters), immediate (within 1 h after encounters), and possibly longer (at the end of a day with encounters) effects of intergroup interactions.

Low Resistance of Senior Resident Females Toward Female Immigration in Bonobos (Pan paniscus) at Wamba, Democratic Republic of the Congo

Female aggression against outgroup conspecifics is an important aspect of intergroup relationships among female primates. Intense aggression from resident females toward immigrant females suggests that the costs of intrasexual competition outweigh the benefits of group living and has been reported in some species with female transfer. In bonobos (Pan paniscus), however, immigrant females are likely to integrate smoothly into an unfamiliar group through affiliative interactions with specific older females. We hypothesized that older resident females gain an indirect benefit from female immigration by increased mating opportunities for their philopatric sons. We examined the effects of 1) age and tenure and 2) the presence of adolescent or adult sons on the probability of aggression by resident females against immigrant females. We collected 73 instances of dyadic agonistic interactions between 14 female bonobos at Wamba, Democratic Republic of the Congo, for five different periods between November 2014 and June 2018, which included four immigrant females with a group tenure of <2.5 years. The female dominance hierarchy correlated with age and tenure, the slope of the hierarchy was weak but statistically significant, and the hierarchy was not linear. We found that the rate of aggression against immigrant females decreased with age in resident females but was unrelated to the presence of mature sons. Our findings suggest that the cost imposed by female immigration varies among resident females, and that social tolerance to immigrant females may be associated with low feeding competition rather than any future benefits.

The role of the immune-microbiological state of the oral cavity as a risk factor for development in the early diagnosis and prevention of diseases of the oral mucosa in children

A special place among dental diseases is occupied by diseases of the mucous membrane (CO) of the oral cavity (PR) (OCR). They remain one of the urgent problems of pediatric therapeutic dentistry. Recently, there has been an increase in the number of inflammatory diseases of SRO. This is due both to an increase in the number of adverse factors affecting the body, and to a decrease in the standard of living of the population. The severity and prevalence of COPD diseases is determined by the nature of the etiological factor and the intensity of aggression.

Influence of Climatic Factors on Aggression and Infectivity of &amp;lt;i&amp;gt;Anopheles&amp;lt;/i&amp;gt; in the Districts the Indoor Residual Spray (IRS) in Northern Benin, West Africa

Background: Climate variability influence the diversity and abundance of malaria vectors and thereby on malaria transmission dynamics. Examine its effect on <i>Anopheles</i> parameters involved in transmission may predict the potential malaria hotspot as a right target for its control intervention strategies. Here, we investigated the influence of meteorological parameters on the aggressiveness and infectivity of <i>Anopheles</i> in two health districts zones where IRS has been extended in Northern Benin. Mosquito collections were carried out using human landing catches to evaluate rates of aggression and infectivity in twelve villages. Concomitantly, meteorological data from synoptic stations of Benin and neighbouring countries were collected in 2016-2017. The spatial distribution of infective bites of <i>An. gambiae</i> is characterized by an intense aggression in the rural villages of the study area. Analysis of variances showed significant HBR difference according to the period but not according to the locality. However, the same analysis carried out with the infectivity rate shows no significant difference according to the period and the locality. In addition, the number of infective bites per man per month is higher in August and October, and the climatic parameters that have mainly favoured aggression are wind speed, humidity, sunshine and temperature. Indeed, the peak of wind speed is concentrated around 1.2 km / h and in September (5 km / h) whereas the aggressiveness score of <i>Anopheles</i> in the region is greater than 10 infective bites per man a year. Malaria transmission by <i>Anopheles</i> is influenced by climatic factors. The climate observed in the districts where IRS was extended in northern Benin has a real impact on <i>Anopheles</i> density and weakens current and future vector control strategies. This could lead to a series of modifications observed in anopheline populations just after IRS implementation ranging from a tendency to exophagy, from a decrease in the rate of blood-feeding to changes in the time, and change in aggressiveness. These phenomena most likely contribute to the sustainability of malaria transmission despite vector control measures.

Competitive ability of grain-forage varieties of spring vetch when grown in a mixture with rapeseed

The object of the research is to study the influence of the method of growing mown and grain-forage varieties of spring vetch in mixed crops with spring rapeseed on the seed yield and crop structure. Indicators that characterize productivity, intensity of arable land use, competitiveness and aggressiveness of crops are considered. Sowing spring vetch with a seeding rate of 1.3, 0.8, 0.6 and 0.4 million germinating seeds per hectare mixed with rapeseed leads to the formation of a grain crop that significantly exceeds the yield for single-species vetch sowing. Evaluation of Land Equivalent Ratio (LER) shows that when using vetch-rapeseed crops, the productivity of 1 ha of arable land increases from 1.38 to 1.98 times, while both the influence of varietal specificity and the seeding rate of the legume component is manifested. The efficiency of arable land use increases due to the interaction of both crops and increasing their competitiveness in the agrocenosis. In the conditions of the Middle Urals, high efficiency of vetch cultivation in mixed crops with rapeseed was revealed, and the influence of changes in the seeding rate on the yield of spring vetch seeds was established.