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Research Article
Calculation of the Working Body of a Potato Planting Machine for Applying Mineral Fertilizers Under the Soil
Issue:
Volume 12, Issue 3, September 2025
Pages:
45-51
Received:
27 June 2025
Accepted:
9 July 2025
Published:
30 July 2025
DOI:
10.11648/j.ajma.20251203.14
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Abstract: The article presents an in-depth analysis of various structural solutions for the working bodies of potato planting machines designed to apply mineral fertilizers simultaneously with planting operations. Based on the conducted research, an innovative design of a furrow opener was developed, which is equipped with a specialized spreader intended for subsurface placement of mineral fertilizers during the potato planting process. The distinctive feature of this spreader is its configuration—a freely rotating ring outfitted with oppositely oriented blades, which ensures uniform dispersion. Through theoretical modeling and calculations, the optimal geometric and operational parameters of this working unit were determined. The study substantiates that the implementation of the proposed design significantly enhances the uniformity of fertilizer distribution both in terms of lateral spread and depth within the potato ridge, thereby improving agronomic efficiency and contributing to better crop development.
Abstract: The article presents an in-depth analysis of various structural solutions for the working bodies of potato planting machines designed to apply mineral fertilizers simultaneously with planting operations. Based on the conducted research, an innovative design of a furrow opener was developed, which is equipped with a specialized spreader intended for...
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Research Article
Theoretical Substantiation of Mineral Fertilizer Movement in the Fertilizer Tube
Turdaliyev Voxidjon Maxsudovich
,
Eksanova Santalatxon Sharobidinovna*
Issue:
Volume 12, Issue 3, September 2025
Pages:
52-56
Received:
7 July 2025
Accepted:
19 July 2025
Published:
5 August 2025
Abstract: The development and implementation of energy and resource-saving types of machinery and equipment for agricultural activities in crop fields dedicated to vegetable cultivation is gaining a leading position worldwide. "Considering that vegetable crops are cultivated on over 58.2 million hectares globally it is a crucial task to introduce high-performance, modern technical means for fertilizing vegetable crops and inter-row cultivation. In this regard, special attention is being paid to using compact, low-energy-consuming technical means that allow for increasing the efficiency of fertilizer use in vegetable cultivation and applying them to the specified depth and width. World-wide, research and development efforts are underway to develop new scientific and technical solutions for resource-saving technical means that apply fertilizers locally and work in open conditions for inter-row cultivation, with the aim of reducing the amount of applied fertilizers and increasing their effectiveness in preserving the natural properties of vegetables. In this direction, particular attention is paid to developing a drill coulter design that ensures the operation of working bodies in open conditions to reduce energy consumption during local fertilizer application and inter-row cultivation in a single pass for onions, as well as scientifically substantiating the technological processes and parameters they performed. This article presents the results of theoretical studies conducted on the movement of mineral fertilizers from the metering device through the fertilizer conduit. The main factors affecting the movement of mineral fertilizers in the fertilizer conduit are analyzed. Based on the research, graphs illustrating the change in the fertilizer exit rate from the conduit over time are constructed. Based on the results obtained, scientifically based recommendations for uniform fertilizer application are provided. The length of the fertilizer tube and the angles of the guide installation can be selected depending on the speed of the fertilizer machine, the falling distance of the fertilizer, and the application rate.
Abstract: The development and implementation of energy and resource-saving types of machinery and equipment for agricultural activities in crop fields dedicated to vegetable cultivation is gaining a leading position worldwide. "Considering that vegetable crops are cultivated on over 58.2 million hectares globally it is a crucial task to introduce high-perfor...
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Research Article
Theoretical Description of the Movement of Soil Clods Due to Interaction with the Loosening Drum of the Separator Machine
Nabijon Bayboboev,
Gayrat Baxadirov,
Nuriddin Abdualiyev,
Jurabek Umirzoqov*
Issue:
Volume 12, Issue 3, September 2025
Pages:
57-61
Received:
7 July 2025
Accepted:
18 July 2025
Published:
25 August 2025
DOI:
10.11648/j.ajma.20251203.13
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Abstract: This article explores the theoretical foundations of soil clod movement during their interaction with the loosening drum of a separator machine. The study primarily focuses on the mechanisms of clod disintegration under free impact conditions and their subsequent separation through the elevator gaps. Special attention is given to the physical principles governing the fragmentation of soil clods, taking into account both kinematic and dynamic aspects of their interaction with the drum pegs. To comprehensively analyze the process, mathematical models have been developed to describe the motion parameters, impact dynamics, and resulting fragmentation behavior of the clods. The research also evaluates the energy consumption associated with overcoming soil resistance and achieving effective fragmentation. Furthermore, differential equations have been formulated to depict the soil clod motion along the separating elevator, providing a clear understanding of their behavior under working conditions. The solutions to these equations are illustrated graphically, offering visual insights into the separation process. The theoretical approach adopted in this study draws on established analogies from the theory of threshing drums, enabling the application of existing scientific findings to enhance the efficiency and performance of separator machines. Such an approach contributes to the rational selection of design parameters and operating modes aimed at improving soil processing efficiency.
Abstract: This article explores the theoretical foundations of soil clod movement during their interaction with the loosening drum of a separator machine. The study primarily focuses on the mechanisms of clod disintegration under free impact conditions and their subsequent separation through the elevator gaps. Special attention is given to the physical princ...
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Research Article
Determination of Mechanical Properties of Mountain Rocks in Piedmont Areas of Namangan Region
Mamahonov Azam,
Sultanov Davronbek*
Issue:
Volume 12, Issue 3, September 2025
Pages:
62-68
Received:
13 July 2025
Accepted:
24 July 2025
Published:
25 August 2025
DOI:
10.11648/j.ajma.20251203.15
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Abstract: The article presents a detailed study of the physical and mechanical properties of natural mountain rocks that are commonly used by the local population as construction materials in the mountainous areas of Chartak District, located in the Namangan Region. The research was conducted to determine the suitability of these rock types for various construction and infrastructure purposes, especially in regions where natural resources are directly used from the surrounding environment. As part of the study, several critical parameters were analyzed through laboratory testing. The compressive strength of the examined rock samples was found to range between 66 and 78 MPa, which indicates a relatively high ability to withstand axial loads. This makes the rocks well-suited for use in load-bearing walls and foundations. In addition to compressive strength, the flexural strength of the rocks was assessed. The values ranged from 5.63 to 13.07 MPa, reflecting the materials’ capacity to resist bending forces, which is crucial in structural components subject to stress and vibration. These values suggest that the rocks exhibit sufficient resistance to flexural deformation, which further supports their application in various building elements. Another significant aspect evaluated was the abrasion resistance, represented by the index И₁, which ranged from 11.6% to 11.8%. This relatively low abrasion loss indicates that the rocks possess good wear resistance, making them particularly effective for use in areas exposed to friction and mechanical wear, such as pavements and road surfaces. Furthermore, when the obtained values were compared to relevant construction and materials standards, it was determined that these rocks meet the necessary requirements for use in the construction of highways, pedestrian walkways, and structures subjected to high loads. Their strength, durability, and resistance to external influences make them a viable option for sustainable and long-term use in civil engineering projects. Overall, the findings of this research provide valuable insight into the engineering characteristics of locally available rock materials and support their broader application in infrastructure development, especially in rural and mountainous regions where access to industrial materials may be limited.
Abstract: The article presents a detailed study of the physical and mechanical properties of natural mountain rocks that are commonly used by the local population as construction materials in the mountainous areas of Chartak District, located in the Namangan Region. The research was conducted to determine the suitability of these rock types for various const...
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Research Article
Results of Laboratory Wear Testing of Materials of G-Shaped Freeze-Cultivator Knives
Kasimov Karimjon,
Kadirov Akhrorjon*
Issue:
Volume 12, Issue 3, September 2025
Pages:
69-74
Received:
13 July 2025
Accepted:
23 July 2025
Published:
25 August 2025
DOI:
10.11648/j.ajma.20251203.16
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Abstract: This article presents a comprehensive analysis of the wear behavior of G-shaped blades used in milling cultivators under controlled laboratory conditions. The study specifically focuses on evaluating how various operational factors influence the wear intensity of the blade material. Among the key parameters analyzed are the applied pressure force, the total duration of the testing process, the linear friction speed between the blade surface and the abrasive medium, as well as the rate of abrasive material consumption throughout the test cycle. The laboratory experiments were designed to simulate realistic working conditions to which the blades are typically subjected during soil cultivation operations. By systematically varying the pressure force applied to the blade samples, the researchers were able to observe and quantify the correlation between increasing load and material wear rate. Higher pressure levels generally led to a more intense abrasion effect, highlighting the critical importance of optimizing operational loads during field use. Another significant factor investigated was the testing duration. It was observed that prolonged exposure of the blade materials to abrasive interaction progressively increased the wear depth, which directly correlates with reduced blade service life. This finding underscores the necessity of selecting materials with enhanced wear resistance for longer operational cycles.
Abstract: This article presents a comprehensive analysis of the wear behavior of G-shaped blades used in milling cultivators under controlled laboratory conditions. The study specifically focuses on evaluating how various operational factors influence the wear intensity of the blade material. Among the key parameters analyzed are the applied pressure force, ...
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