Soft Spring Research Articles

An online method to monitor hand muscle tone during robot-assisted rehabilitation.

Introduction: Robot-assisted neurorehabilitation is becoming an established method to complement conventional therapy after stroke and provide intensive therapy regimes in unsupervised settings (e.g., home rehabilitation). Intensive therapies may temporarily contribute to increasing muscle tone and spasticity, especially in stroke patients presenting tone alterations. If sustained without supervision, such an increase in muscle tone could have negative effects (e.g., functional disability, pain). We propose an online perturbation-based method that monitors finger muscle tone during unsupervised robot-assisted hand therapy exercises. Methods: We used the ReHandyBot, a novel 2 degrees of freedom (DOF) haptic device to perform robot-assisted therapy exercises training hand grasping (i.e., flexion-extension of the fingers) and forearm pronosupination. The tone estimation method consisted of fast (150ms) and slow (250ms) 20mm ramp-and-hold perturbations on the grasping DOF, which were applied during the exercises to stretch the finger flexors. The perturbation-induced peak force at the finger pads was used to compute tone. In this work, we evaluated the method performance in a stiffness identification experiment with springs (0.97 and 1.57N/mm), which simulated the stiffness of a human hand, and in a pilot study with subjects with increased muscle tone after stroke and unimpaired, which performed one active sensorimotor exercise embedding the tone monitoring method. Results: The method accurately estimates forces with root mean square percentage errors of 3.8% and 11.3% for the soft and stiff spring, respectively. In the pilot study, six chronic ischemic stroke patients [141.8 (56.7) months after stroke, 64.3 (9.5) years old, expressed as mean (std)] and ten unimpaired subjects [59.9 (6.1) years old] were tested without adverse events. The average reaction force at the level of the fingertip during slow and fast perturbations in the exercise were respectively 10.7 (5.6) N and 13.7 (5.6) N for the patients and 5.8 (4.2) N and 6.8 (5.1) N for the unimpaired subjects. Discussion: The proposed method estimates reaction forces of physical springs accurately, and captures online increased reaction forces in persons with stroke compared to unimpaired subjects within unsupervised human-robot interactions. In the future, the identified range of muscle tone increase after stroke could be used to customize therapy for each subject and maintain safety during intensive robot-assisted rehabilitation.

Ecological plasticity and stability of promising lines of spring wheat (Triticum aestivum L.) in terms of yield

Purpose. To analyze lines of competitive testing of soft spring wheat in terms of ecological plasticity and stability using statistical methods of analysis and identify lines with high stability of grain yield. Methods. The studies were carried out during 2018–2020, on the basis of the V. M. Remeslo Myronivka Institute of Wheat NAAS of Ukraine. When considering the results obtained, generally accepted methods of genetic and statistical analysis were used. Results. Evaluation of breeding material in different years makes it possible to obtain information about the characteristics of the reaction of genotypes to changes in environmental conditions. As a result of the studies, it was found that the lines Lutescens 14-32 (bi = 0.59), Erythrospermum 15-32 (bi = 0.44), Lutescens 14-47 (bi = 0.22) were of high plasticity. Calculations of ecological stability indicate that lines are considered stable, the variance of stability is zero or close to zero. From a practical point of view, lines with a combined manifestation of high ecological plasticity and stability are considered valuable. This was the line Erythro­spermum 15-32 (bi = 0.44; S2di = 0.01) that indicates its low reaction rate and the ability to provide a consistently high level of yield under any growing conditions. The most valuable are the genotypes that combine a low level of the coefficient of variation, high homeostaticity and bree­ding value, which include the lines Erythrospermum 15-32 (Hom = 206.42, Sc = 4.11), Lutescens 14-47 (Hom = 98.41, Sc = 3.91), Erythrospermum 17-08 (Hom = 78.57, Sc = 3.76), Erythrospermum 14-65 (Hom = 54.84, Sc = 3.75), Lutescens 14-32 (Hom = 54.60, Sc = 4.17), Lutescens 14-13 (Hom = 35.60, Sc = 3.78), Lutescens 14-48 (Hom = 46.66, Sc = 3.58). Conclusions. The evaluation of breeding material is of great importance when creating new high-performance varieties with adaptive potential. The method for assessing ecological plasticity and variants of its stability made it possible to differentiate wheat lines of soft spring competitive testing by their response to changes in gro­wing conditions. For a more optimal selection of breeding material in terms of ecological plasticity and stability, breeding programs should take into account ranked estimates of genotypes.

Peculiarities of grain crop yield programming in precision farming in the foreststeppe of Novosibirsk Priobye

Presents research results (2019-2022) to assess the effectiveness of grain crop yield programming: soft spring wheat, spring barley, and oats using geoinformation technologies in satellite navigation applications. Experiments were conducted in the forest-steppe of the Novosibirsk Priob’ye region on leached chernozem in JSC livestock breeding farm “Irmen.”, Ordynsky district, Novosibirsk region. The authors programmed yields on the main grain crops: spring soft wheat varieties Novosibirskaya 31, spring barley Margret and oats varieties Rovesnik and Max. The use of balanced nutrition on the background of their differentiated application in combination with geoinformation technologies and satellite navigation helped to increase the parameters of average leaf area and FSP of soft spring wheat by 24%, spring barley by 22%, and oats by 27%.Fertilizer application on the programmed yield of 4.5-6 t / ha is efficient on the background of differentiated use of mineral fertilizers with justifiability yield programming 117%. The authors proved the dependence of grain crop yield on fertilizers by 38% and weather conditions - by 26% using a statistical method. Balanced doses of mineral nutrition at their differential application increased the protein content of cereal crops by 2%, starch by 4, fat by 0.1 and fiber by 0.2%. The use of yield programming has significantly increased its performance with good product quality. The efficiency of this agricultural technique in the system of optimal use of geoinformation technology with satellite navigation and drones averages 96%. This farming technique is cost-effective, and the level of profitability of production of major crops reached 182%.

The effect of a Trichodermin biopreparation based on poplar litter on the germination of tomatoes and wheat

The paper presents the results of the study of a biological product of the type "Trichodermin", obtained as a result of biodegradation of plant waste - poplar litter - by Siberian strains K6-15 Trichoderma spp. Two methods were used: seed dusting and the introduction of a biological product into the soil with different concentrations. Germination and number of infected seeds of tomato (Irina F1 variety, Geolia) and Novosibirskaya 31 soft spring wheat were evaluated in the work.

Practical Applicability of Radiation Technologies in Food Systems

While achieving the food security, the use of radiation technologies for the processing of food wheat grains is distinguished by its practical significance. The use of inactivating (1-5 kGy) and sterilizing (25 kGy) doses of gamma radiation shall ensure the biosafety of radiation-treated grain. Changes in the main signs of freshness (color, odor) after treatment with different doses of ionizing radiation and during storage for up to 30 days have not been established. Varietal (species) grain purity of “Ekaterina” soft spring wheat is 99.7%, its grain purity is 99.93%. As a result of the research, a decrease in grain moisture content by 0.02-0.83% has been found compared to non-irradiated wheat grain at the stage of setting up for the experiment, after 15 days of storage – by 0.15-1.02%, and after 30 days of storage – by 0.44-1.40%, respectively; there is a significant decrease in the grain microflora established by the quantitative parameters of QMAFAnM and fungal microbiota, which makes it possible to establish the positive effect of using gamma radiation to improve the storage capacity of food grains in food systems. Research work needs to be continued in matters of nutritional value assessment.

Analysis of the regeneration potential of several varieties of soft spring wheat Triticum aestivum L. in vitro culture

Analysis of the regeneration potential of several varieties of soft spring wheat Triticum aestivum L. in vitro culture

Theoretical, methodological, and breeding results of the DIAS program in increasing grain production using the example of creation of a soft spring wheat variety - Kazakhstanskaya rannespelaya (origin, characteristics, economic value)

The selection of parental pairs is carried out considering their genealogical trees and the dynamics of the lim factors of the environment, in the creation area, with further hybridization, and subsequent multiple re-sowing of the population. The Kazakhstanskaya rannespelaya variety was created by selection from the F5 hybrid combination of Novosibirskaya 67 × Omskaya 9, the Interdepartmental program DIAS. The breeding record of Novosibirskaya 67 consists of 9 and Omskaya 9 – of 37 varieties, of which 19 are of winter origin. The inheritance of ear productivity, in both varieties, followed the type of complementary epistasis, with incomplete dominance and overdominance, with a large proportion, of recessive genes. In conditions of the Northern Trans-Urals, an early-ripening, yielding line was selected in F5 - Lutescens 1227-8-79, which became the ancestor of the Kazakhstanskaya rannespelaya variety. The variety has successfully passed the State variety testing and is registered in the Qostanay, North Kazakhstan and Kokchetav regions of Kazakhstan, and in the Chelyabinsk region of the Russian Federation, according to the grain quality it is included in the list of strong varieties. In the north of Kazakhstan, Kazakhstanskaya rannespelaya is cultivated on large areas. This variety, as a genetic source, has a good variety-forming ability. With its participation, 6 varieties were created in the Research Institute of the Northern Trans-Urals. Of these, Tyumenskaya 29 and Grenada are registered in 9 and 10 zones of the Russian Federation. It is used in the breeding programs of the Republic of Kazakhstan.

Developing the Adapted Scale of Microphenological Phases for the Controlled Sprouting of Grain Crops

As a result of the research and in view of the methodological approach to the controlled sprouting of grain crops, the term “sprouted grain” adapted to the conditions of controlled sprouting has been proposed. A unified scale of microphenological phases for controlled sprouting of different types of grain crops treated with low doses of gamma radiation has been developed. In order to take the reading for the quiescence state of the grains of the “Ekaterina” soft spring wheat and the “Remembrance of Chepelev” spring barley of 2019-2021 harvest years zoned in the Ural region, the treatment with low doses of ionizing gamma radiation (5Gy, 10Gy, and 15Gy) has been carried out. In the developed scale of microphenological phases for germination of grain crops, the dry grain phase has been introduced and the technological features of the sprouting and its effectiveness have been given. In the second phase of the sprouting, intense water absorption is observed in all groups of samples. Bioactivation of grain crops effects the increase in germination energy—up to 92-93% when treated with a dose of 10Gy. The germination rate of the 1st seed is on average 2-3 days. Low-dose gamma radiation of grains is distinguished by its industrial applicability when sprouted grains are used as an independent product or as a raw material component.

Motion analysis of magnetic spring pendulum

In order to analyze the motion characteristics of the spring pendulum under the action of magnetic field force, the motion of the spring pendulum will be studied by applying a uniform magnetic field in the vertical direction. Firstly, a first-order approximate solution is given by studying the micro-vibration around its equilibrium point. And an approximate solution similar to the Foucault pendulum is also presented in the case of a soft spring with strong ductility. Then, according to the resonance conditions of mechanical vibration, the internal resonance phenomenon of magnetic spring pendulum is discovered, and then the conclusion that the energy of the system is cyclically transmitted between the three modes of breathing, oscillating and deflection is presented subsequently. Finally, the influence of magnetic field strength on the motion stability of the spring pendulum is explored, and not only the bifurcation phenomenon at its equilibrium point is found, but also the complex dynamic behavior including chaotic motion occurs.

Missense alleles of the HMW glutenin subunits Dx5 and Dy10 have small changes in function relative to missense changes in Puroindoline a and b

AbstractBackground and ObjectivesThe high molecular weight glutenin subunit genes (HMW‐GS) in wheat (Triticum aestivum L.) play a key role in determining dough functionality. More specifically allelic variation for the Glu‐D1 subunit loci is consistently associated with bread making quality. Since much of the hard wheat germplasm is fixed for the more favorable 1Dx5 + 1Dy10 haplotype, our goal was to identify allelic variation in 1Dx5 and 1Dy10 HMW‐GS genes using an ethyl methanesulfonate (EMS) mutagenized population in the soft white spring wheat cultivar “Alpowa.” The same source population was previously used in screening for creating novel alleles in Puroindoline a (Pina) and Puroindoline b (Pinb) which are responsible for grain hardness variation. Direct sequencing of 384 M3 families identified 135 point mutations equally dispersed across 1Dx5 and 1Dy10. The mutation discovery rate was 1/12.7 kb of DNA, equal to that found in the Pin loci. Mutation carrying plants were crossed to the nonmutagenized Alpowa parent to create F2 populations segregating for the induced EMS HMW Glutenin mutations. Swelling index of gluten (SIG) was measured from seed from field grown plants to assess the impact of each EMS mutation upon Glutenin function.FindingsNonsense mutations in both 1Dx5 and 1Dy10 reduced SIG values, indicating both 1Dx5 and 1Dy10 are needed for gluten functionality. Missense mutations did not alter SIG values compared to their wild type counterparts. In contrast missense mutations within the tryptophan‐rich region of both PINS increased grain hardness pointing to the importance of this protein region. No such region in 1Dx5 or 1Dy10 was found indicating these proteins are structurally stable and tolerant of amino acid substitution.ConclusionsResults from the Glu‐D1 subunit and Pin loci show that useful phenotypic variation can be created using EMS mutagenesis for genes where naturally occurring mutations occur from amino substitutions as is the case for the Pin loci.Significance and NoveltyEMS induced mutations are useful for creating new alleles in storage proteins with much greater impacts in genes that have a defined active site as for the Pin loci than in genes such as the HMW Glu‐1 genes which have a long repetitive region.

Design and Gesture Optimization of a Soft-Rigid Robotic Hand for Adaptive Grasping.

Soft robotic hands are inherently safer and more compliant in robot-environment interaction than rigid manipulators, but their flexibility and versatility still need improving. In this article, a gesture adaptive soft-rigid robotic hand is proposed. The robotic hand has three pneumatic two-segment fingers. Each finger segment is driven independently for flexible gesture adjustment to match up with different object shapes. The palm is constructed by a rigid skeleton driven by a soft pneumatic spring. It provides a firm support, large workspace, and independent force control for the fingers. Geometry model of the robotic hand is established, based on which a grasping gesture optimization algorithm is adopted. The fingers achieve optimal contact with objects by performing maximal curving similarity with the object outlines. Experiment shows that the soft-rigid robotic hand provides adaptive and reliable grasping for objects of different sizes, shapes, and materials with optimized gestures.

Click mechanism for racing car self-levelling flap

This paper presents a simulation and experimental study on a passive “click” mechanism, which is designed to adapt the angle of incidence of a racing car flap along a circuit to have high down force when the car undertakes low speed corners and low drag force when the car sprints along the straights. The mechanism is composed by four rigid linkages connected via flexible pivot junctions. The paper first provides a parametric study that shows how the stiffness of the flexible pivot junctions, the length of the linkages and the rest angles of the linkages influence the typical N-shaped resistant moment–joint rotation function, which is at the basis of the clicking effect. The parametric study is then used to design a mechanism, which is characterised by a stable high pitch equilibrium configuration only and maintains the N-shaped moment-rotation feature such that the flap snaps from high-to-low pitch and vice versa at given critical speeds during acceleration and deceleration of the car. Finally, the dynamic response of a flap mounted on the proposed monostable clicking joint is analysed in detail and contrasted with that of a flap fixed on classical passive joints built with a stiff spring or a soft pre-loaded spring.

Effect of thoracic stiffness on chest compression performance - A prospective randomized crossover observational manikin study

IntroductionHuman thoracic stiffness varies and may affect the performance during external chest compression (ECC). The Extra Compression Spring Resusci® QCPR Anne manikin is a high-fidelity training model developed for ECC training that can account for varying levels of thoracic stiffness. The aim of this study was to use this training model to investigate the effects of thoracic stiffness on ECC biomechanics and qualities. MethodsFifty-two participants performed standard ECC on the manikin with different thoracic springs to simulate varying levels of thoracic stiffness. The MatScan Pressure Measurement system was used to investigate the ECC pressure and force distribution. ResultsThe hard spring group’s performance had a better complete recoil ratio (90.06 ± 24.84% vs. 79.75 ± 32.17% vs. 56.42 ± 40.15%, p < 0.001 at second minute), but was more inferior than the standard and soft spring groups in overall quality, ECC depth (34.17 ± 11.45 mm vs. 41.25 ± 11.42 mm vs. 51.88 ± 7.56, p < 0.001 at second minutes), corrected depth ratio, and corrected rate ratio. The hard spring group had less radial-ulnar peak pressure difference (kgf/cm2) than the other two groups (−0.28 ± 0.38 vs. −0.30 ± 0.43 vs. −0.47 ± 0.34, p = 0.01), demonstrating that more symmetrical pressure was applied in the hard spring group. The soft spring group had better ECC depth, corrected depth ratio, corrected rate ratio, and overall quality, but its performance in complete recoil was inferior, and unbalanced pressure was more liable to cause injury. Hard springs caused operator fatigue easily. ConclusionThe thoracic stiffness greatly affected the performance of ECC. Our findings provided information for more effective ECC practices and training.

Stability of a Cross-Flow Heat-Exchanger Tube With Asymmetric Supports

Abstract Heat-exchanger tubes subjected to cross-flow experience a fluid elastic instability (FEI) at a critical flow velocity. Baffle plates are often used to provide additional stiffness to long tubes. A cladding is provided between the baffle plates and the tubes to allow for thermal expansion, and the cladding acts like a soft spring. In this paper, we study the contact between the cladding and the tube when the stiffness of the cladding is asymmetric. The tube is modeled as a cantilever Euler–Bernoulli beam, and the fluid forces are represented using an added mass, added damping and a time-delayed displacement term. This results in a partial delay differential equation model for the tube vibration. Using the Galerkin approximation and considering only a single mode, a delay differential equation (DDE) model is developed. However, due to the presence of the delay, the single mode model is also infinite-dimensional. This model contains sign function nonlinearity due to the asymmetry in the contact stiffness of the cladding. The DDE model is essentially nonlinear—that is, no linear approximation exists. However, its solutions are scalable: if q(t) is a solution, then α q(t) is also a solution for any α&amp;gt;0. By exploiting this scalability property of solutions, we use Lyapunov-like exponents to probe the stability of the nonlinear DDE. Further, by numerical continuation, we numerically demonstrate the existence of periodic solutions on the stability boundary. Our stability charts will be beneficial to the designers of heat-exchangers.

A piezoelectric rotatable magnetic force microscope system in a 10T cryogen-free superconducting magnet.

We constructed a piezoelectric rotatable magnetic force microscope (MFM) that works in a 10T cryogen-free superconducting magnet. The piezoelectric tube is deformed tangentially and drives a bearing under the inertial drive principle so the MFM head can obtain rotary movement. Due to the novel piezoelectric design, the MFM can be hung underneath the heat sink via a soft spring, and it can be rotated in a cryogen-free superconducting magnet so that the direction of the magnetic field can be changed from 0° to 90° continuously. The system functions in magnetic fields of up to 10T in any direction relative to the tip-sample geometry. This is the first piezoelectric rotatable MFM ever reported. Using this homemade rotatable MFM, we imaged the structure of magnetic tracks on a commercial videotape. When the magnetic field angle changes from 0° to 90°, the magnetic moments on the tape and probe tip also rotate. A magnetic field strength of 0.8T parallel to the sample surface is required to fully rotate the magnetic moment of the tip we used, but 0.8T is not enough to fully rotate the magnetic moment of the sample. The piezoelectric rotatable MFM is expected to be widely used to study the anisotropy of magnetic materials due to its superiority in obtaining the same high field in and out of plane (compared with a vector magnet) as well as in maintaining the same scan area precisely (compared with a mechanical rotatable MFM, especially for atomic-scale scan areas).

Comparative Study of Bending Loads at Wheel Centres of Heavy Commercial Vehicles

Abstract: In commercial vehicles, leaf springs play a major role in designing the suspension system. Leaf springs are the most popular designs having multiple leaves in contact with each other and show hysteresis behaviour when loaded and unloaded. The leaf spring acts as a linkage for holding the axle in position and thus separate linkages are not necessary. It makes the construction of the suspension simple and strong. Because the positioning of the axle is carried out by the leaf springs, it is disadvantageous to use soft springs i.e. springs with low spring constant. Leaf springs are excellent in suspending large loads, since they are designed using 'bending beam' equations. The stiffness of the leaf spring assembly can be altered as desired, by changing the number of leaves. The objective of this paper is to compare the bending loads coming at the rear wheel centres of the vehicle when it runs in torture track and over a single bump. Bending loads were

Design, Analysis, and Real-Time Simulation of a 3D Soft Robotic Snake.

Snakes are a remarkable source of inspiration for mobile search-and-rescue robots. Their unique slender body structure and multiple modes of locomotion are well-suited to movement in narrow passages and other difficult terrain. The design, manufacturing, modeling, and control techniques of soft robotics make it possible to imitate the structure, mechanical properties, and locomotion gaits of snakes, opening up new possibilities in robotics research. Building on our track record of contributions in this area, this article presents a soft robotic snake made of modules that can actively deform in three-dimensional (3D) and rigorously studies its performance under a range of conditions, including gait parameters, number of modules, and differences in the environment. A soft 3D-printed wave spring sheath is developed to support the robot modules, increasing the snake's performance in climbing steps threefold. Finally, we introduce a simulator and a numerical model to provide a real-time simulation of the soft robotic snake. With the help of the real-time simulator, it is possible to develop and test new locomotion gaits for the soft robotic snake within a short period of time, compared with experimental trial and error. As a result, the soft robotic snake presented in this article is able to locomote on different surfaces, perform different bioinspired and custom gaits, and climb over steps.

СОРТОВА ПРОДУКТИВНІСТЬ І ЯКІСТЬ ЗЕРНА ПШЕНИЦІ М’ЯКОЇ ЯРОЇ В УМОВАХ ПРАВОБЕРЕЖНОГО ЛІСОСТЕПУ УКРАЇНИ

Variety productivity and grain quality of soft spring wheat depending on the variety are identified, namely the varieties of spring wheat Struna Myronivska (yield 5.19 t/ha, weight of 1000 grains – 35 g, grain-unit – 800 g/l, hardness – 98%), falling number – 331 s, protein content – 4.8%, gluten – 32%) and Panianka (yield - 4.14 ha, fall number - 286 s, gluten quality – 67 units, flour strength – 300 units, volume yield of bread – 1030 cm3, bread porosity – 5 points) best combine high yields and good grain quality. The rheological properties of the dough (flour strength, its elasticity and extensibility) characterize the varieties of soft spring wheat as varieties with high technological properties. The best baking properties are observed in Panianka variety, with porosity and color of bread crumbs 5.0 and 4.8 points, respectively. It is found that Panianka variety has the greatest value as improvers in terms of rheological and baking properties of flour, Struna Myronivska and Simkoda Myronivska are middle filler varieties.

Improvement of differentiated fertilizer application technology in the forest-steppe of Novosibirsk Priobye

In the article, the authors presented the results of the experimental work (2019-2021) to study the application of differentiated fertilizer application on cereal crops. Western Siberia is a region with risky conditions for stable grain crop production. Soft spring wheat and spring barley are the primary crops for food and feed. Soft spring wheat and spring barley are also characterized by a high demand for the most important environmental factors, which are highly variable. Current trends in precision farming imply the need for different technological operations. These operations are differentiated both in time and by individual crop rotation fields. At the same time, operations take more fully into account the bio-resource potential of cultivated agricultural enterprises. And these operations also take into account soil and terrain features, which are controlled by the aggregates and their links to technological operations. In the field, the authors used aggregates with differentiated application rates of fertilizers or crop protection products. The yield mapping is an element of precision farming technology. This technology is achieved by signal sensors on combined and onboard computers and GPS receivers during the harvesting period. An accurate map of the field, showing the characteristics of each field section, enables rational resource allocation and increases yields from each section of the field. The availability of digital maps ensures the optimization of fertilizer, seed, and water application to each section of the field. Under the conditions of the JSC Livestock Breeding Farm Irmen, Ordynsiky district, Novosibirsk region, the data are entered into the on-board computer of agricultural equipment going into the field, and innovative control of technological processes in crop production is carried out through GPS navigation. The work aims to improve the technology of the application of differentiated fertilizers to grain crops in the precision agriculture system under forest-steppe conditions in the Novosibirsk region Priobye. The research was carried out in 2019-2021 in the soil and climatic zone of drained forest steppe on leached chernozem at JSC Livestock Breeding Farm «Irmen» on spring wheat varieties Novosibirskaya 31, Licamero, as well as the spring barley variety Paustian. The use of differentiated fertilizer application contributes to an increase in grain yield parameters of spring wheat by 36% and of spring barley varieties by 28%. The study showed that differential fertilizer application contributes to the improvement of grain quality parameters of soft spring wheat.

Seeder for Different Depths of Grain Sowing and Mineral Fertilizers Application

The article presents the main results of a three-year research on the use of a seeder with openers for different depths of grain sowing and mineral fertilizers application.Research purpose To compare SKP-2.1 seeder equipped with experimental openers and the serially produced one and to determine the yield and quality indicators of spring soft wheat grain, depending on the sowing method and the rate of nitrogen mineral fertilizers application.Materials and methods A comparative field agrotechnical experiment was carried out to compare the indicators of field germination, yield by variants and the quality of grain obtained in different variants of the experiment. The experiment was carried out on Omskaya-36 soft spring wheat. The sowing performed by SKP-2.1 serially produced seeder-cultivator was taken as control. The experimental plots were sown with the same seeder but equipped with combined coulters, which are lancet paws that ensure the placement of granular mineral fertilizers and seeds in soil horizons of different depths.Results and discussion According to the three-year research, the maximum economic effect was obtained at the rate of ammonium nitrate application of 150 kg/ha. As a result, the yield increased by 0.44 t/ha, the cost of additional production accounted for 6740 rub/ha. A slight decrease in the economic effect was revealed with an increase in the rate of fertilizer application. It was determined that the maximum yield and the best grain quality characteristics both in the control sowing options and in the experimental ones were obtained with the application of ammonium nitrate a rate of 150 and 200 kg/ha.Conclusions It was established that the use of a seeder for different-depth grain sowing and mineral fertilizers application, depending on the spring weather conditions and the ammonium nitrate dose, provides an increase in field germination by 11-18%; the average annual increase in grain yield accounted for 16.3%. The gluten content proved to increase from 24.6 (control) to 29.8 percent.