Subjects -> AGRICULTURE (Total: 981 journals)
    - AGRICULTURAL ECONOMICS (93 journals)
    - AGRICULTURE (680 journals)
    - CROP PRODUCTION AND SOIL (120 journals)
    - DAIRYING AND DAIRY PRODUCTS (30 journals)
    - POULTRY AND LIVESTOCK (58 journals)

AGRICULTURE (680 journals)            First | 1 2 3 4     

Showing 201 - 263 of 263 Journals sorted by number of followers
Biodiversity     Hybrid Journal   (Followers: 27)
Agriculture & Food Security     Open Access   (Followers: 21)
Future of Food : Journal on Food, Agriculture and Society     Open Access   (Followers: 20)
African Journal of Food, Agriculture, Nutrition and Development     Open Access   (Followers: 18)
Nature Plants     Full-text available via subscription   (Followers: 17)
Advances in Agriculture     Open Access   (Followers: 15)
Agricultural History Review     Full-text available via subscription   (Followers: 15)
Indian Journal of Agricultural Sciences     Open Access   (Followers: 12)
Biological Agriculture & Horticulture : An International Journal for Sustainable Production Systems     Partially Free   (Followers: 11)
Journal of Land and Rural Studies     Hybrid Journal   (Followers: 11)
Advances in Life Science and Technology     Open Access   (Followers: 11)
Agriculture and Food Sciences Research     Open Access   (Followers: 10)
Agricultural Research     Hybrid Journal   (Followers: 10)
Indian Horticulture     Full-text available via subscription   (Followers: 9)
Culture, Agriculture, Food and Environment     Hybrid Journal   (Followers: 8)
Arboricultural Journal : The International Journal of Urban Forestry     Hybrid Journal   (Followers: 7)
Aceh International Journal of Science and Technology     Open Access   (Followers: 7)
Invertebrate Reproduction & Development     Hybrid Journal   (Followers: 6)
Journal of Agriculture and Sustainability     Open Access   (Followers: 6)
Journal of Agriculture and Social Research (JASR)     Open Access   (Followers: 6)
New Journal of Botany     Hybrid Journal   (Followers: 6)
Journal of Agriculture, Forestry and the Social Sciences     Full-text available via subscription   (Followers: 6)
International Journal of Agriculture and Forestry     Open Access   (Followers: 6)
Acta Scientiarum. Animal Sciences     Open Access   (Followers: 5)
Journal of Advances in Agriculture     Open Access   (Followers: 5)
American Journal of Rural Development     Open Access   (Followers: 5)
EvoDevo     Open Access   (Followers: 5)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
Acta Agrobotanica     Open Access   (Followers: 4)
Italian Journal of Agronomy     Open Access   (Followers: 4)
Journal of Agricultural Science     Open Access   (Followers: 4)
EU Agrarian Law     Open Access   (Followers: 4)
Studies in Australian Garden History     Full-text available via subscription   (Followers: 4)
Journal of Agriculture and Rural Development in the Tropics and Subtropics     Open Access   (Followers: 4)
Tanzania Journal of Agricultural Sciences     Open Access   (Followers: 4)
Journal of Modern Agriculture     Open Access   (Followers: 4)
Journal of Agriculture and Natural Resources Sciences     Open Access   (Followers: 3)
Journal of the Ghana Science Association     Full-text available via subscription   (Followers: 3)
Journal of Science and Technology (Ghana)     Open Access   (Followers: 3)
Journal of Agricultural Extension and Rural Development     Open Access   (Followers: 3)
Biocatalysis and Agricultural Biotechnology     Hybrid Journal   (Followers: 3)
Sustainable Agriculture Research     Open Access   (Followers: 3)
Food and Energy Security     Open Access   (Followers: 3)
International Journal of Agricultural Research, Innovation and Technology     Open Access   (Followers: 3)
International Journal of Applied Agriculture and Apiculture Research     Open Access   (Followers: 3)
Agra Europe     Full-text available via subscription   (Followers: 3)
Journal of Agricultural Chemistry and Environment     Open Access   (Followers: 3)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 3)
Acta Universitatis Sapientiae, Alimentaria     Open Access   (Followers: 3)
Journal of Essential Oil Research     Hybrid Journal   (Followers: 3)
Diatom Research     Hybrid Journal   (Followers: 3)
Journal of Agricultural Extension     Open Access   (Followers: 2)
Nigerian Food Journal     Full-text available via subscription   (Followers: 2)
International Journal for Parasitology : Parasites and Wildlife     Open Access   (Followers: 2)
Agricultura Tropica et Subtropica     Open Access   (Followers: 2)
Journal of Apicultural Science     Open Access   (Followers: 2)
International Journal of Agricultural Management and Development     Open Access   (Followers: 2)
Ciencia forestal en México     Open Access   (Followers: 2)
Revista Cubana de Ciencia Agrícola     Open Access   (Followers: 2)
Journal of Agriculture and Food Sciences     Full-text available via subscription   (Followers: 2)
Tropical Agricultural Research and Extension     Open Access   (Followers: 2)
Rural China     Hybrid Journal   (Followers: 2)
Rural Sustainability Research     Open Access   (Followers: 2)
Journal of Biology, Agriculture and Healthcare     Open Access   (Followers: 2)
Agro-Science     Full-text available via subscription   (Followers: 2)
Ghana Journal of Agricultural Science     Full-text available via subscription   (Followers: 2)
New Zealand Journal of Agricultural Research     Hybrid Journal   (Followers: 2)
Tropical Agricultural Research     Open Access   (Followers: 2)
Journal of Sustainable Society     Open Access   (Followers: 2)
Journal of Food Security     Open Access   (Followers: 2)
Journal of Agricultural Engineering     Open Access   (Followers: 2)
Revista Verde de Agroecologia e Desenvolvimento Sustentável     Open Access   (Followers: 2)
Huria : Journal of the Open University of Tanzania     Full-text available via subscription   (Followers: 2)
Buletin Peternakan : Bulletin of Animal Science     Open Access   (Followers: 1)
Berkala Ilmiah Pertanian     Open Access   (Followers: 1)
Journal of Agricultural Studies     Open Access   (Followers: 1)
RIA. Revista de Investigaciones Agropecuarias     Open Access   (Followers: 1)
Agricultural Commodities     Full-text available via subscription   (Followers: 1)
Journal of Agricultural Engineering     Full-text available via subscription   (Followers: 1)
Jurnal Veteriner     Open Access   (Followers: 1)
Archivos de Zootecnia     Open Access   (Followers: 1)
Journal of Natural Sciences Research     Open Access   (Followers: 1)
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca : Food Science and Technology     Open Access   (Followers: 1)
Wartazoa. Indonesian Bulletin of Animal and Veterinary Sciences     Open Access   (Followers: 1)
Research in Agriculture, Livestock and Fisheries     Open Access   (Followers: 1)
COCOS : The Journal of the Coconut Research Institute of Sri Lanka     Open Access   (Followers: 1)
Emirates Journal of Food and Agriculture     Open Access   (Followers: 1)
Frontiers in Science     Open Access   (Followers: 1)
Global Approaches to Extension Practice : A Journal of Agricultural Extension     Full-text available via subscription   (Followers: 1)
Chemical and Biological Technologies for Agriculture     Open Access   (Followers: 1)
Progressive Agriculture     Open Access   (Followers: 1)
Folia Horticulturae     Open Access   (Followers: 1)
Rivista di Studi sulla Sostenibilità     Full-text available via subscription   (Followers: 1)
Journal of Science Foundation     Open Access   (Followers: 1)
Annals of Agricultural Sciences     Open Access   (Followers: 1)
Avances en Investigacion Agropecuaria     Open Access   (Followers: 1)
International Journal of Sustainable Agricultural Management and Informatics     Hybrid Journal   (Followers: 1)
Bangladesh Journal of Agricultural Research     Open Access   (Followers: 1)
Journal of Agricultural Sciences     Open Access   (Followers: 1)
Jurnal Ilmu dan Kesehatan Hewan (Veterinary Science and Medicine Journal)     Open Access   (Followers: 1)
Arquivos do Instituto Biológico     Open Access   (Followers: 1)
International Journal of Recycling of Organic Waste in Agriculture     Open Access   (Followers: 1)
International Journal of Agricultural Extension     Open Access   (Followers: 1)
Innovare Journal of Agricultural Science     Open Access   (Followers: 1)
International Journal of Agriculture System     Open Access   (Followers: 1)
Acta Technologica Agriculturae     Open Access   (Followers: 1)
Plant Knowledge Journal     Open Access   (Followers: 1)
Iranian Journal of Applied Animal Science     Open Access   (Followers: 1)
Journal of Degraded and Mining Lands Management     Open Access   (Followers: 1)
Revista Brasileira de Higiene e Sanidade Animal     Open Access   (Followers: 1)
Science, Technology and Arts Research Journal     Open Access   (Followers: 1)
Nigerian Journal of Technological Research     Full-text available via subscription   (Followers: 1)
Social and Natural Sciences Journal     Open Access  
Jurnal Agroteknologi     Open Access  
Perspectivas Rurales Nueva Época     Open Access  
Organic Farming     Open Access  
Research Ideas and Outcomes     Open Access  
Jurnal Udayana Mengabdi     Open Access  
Landtechnik : Agricultural Engineering     Open Access  
International Letters of Natural Sciences     Open Access  
Agrociencia Uruguay     Open Access  
Heliyon     Open Access  
Ciência e Técnica Vitivinícola     Open Access  
Oilseeds and fats, Crops and Lipids     Open Access  
Annals of Silvicultural Research     Open Access  
Pastura : Journal Of Tropical Forage Science     Open Access  
Journal of Citrus Pathology     Open Access  
Revista Iberoamericana de las Ciencias Biológicas y Agropecuarias     Open Access  
Kansas Agricultural Experiment Station Research Reports     Open Access  
International Journal of Secondary Metabolite     Open Access  
Scientia Agropecuaria     Open Access  
Pelita Perkebunan (Coffee and Cocoa Research Journal)     Open Access  
Revista de Agricultura Neotropical     Open Access  
Cogent Food & Agriculture     Open Access  
Fave : Sección ciencias agrarias     Open Access  
Revista de Ciências Agrárias     Open Access  
Review of Agrarian Studies     Open Access  
Nigerian Journal of Biotechnology     Open Access  
Nigeria Agricultural Journal     Full-text available via subscription  
Annales des Sciences Agronomiques     Full-text available via subscription  
Journal of the Bangladesh Agricultural University     Open Access  
Journal of Buffalo Science     Hybrid Journal  
Revista de Ciências Agroveterinárias     Open Access  
Tropical Grasslands - Forrajes Tropicales     Open Access  
Research in Plant Sciences     Open Access  
World Journal of Agricultural Research     Open Access  
Universal Journal of Agricultural Research     Open Access  
Research & Reviews : Journal of Agriculture Science and Technology     Full-text available via subscription  
Revue Marocaine des Sciences Agronomiques et Vétérinaires     Open Access  
Nativa     Open Access  
SAARC Journal of Agriculture     Open Access  
West African Journal of Applied Ecology     Open Access  
Journal of Agricultural Research and Development     Full-text available via subscription  
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription  
Global Journal of Agricultural Sciences     Full-text available via subscription  
Agrosearch     Open Access  
Agronomie Africaine     Full-text available via subscription  
Professional Agricultural Workers Journal     Open Access  
Interciencia     Open Access  
Nepal Journal of Science and Technology     Open Access  
Journal of the Saudi Society of Agricultural Sciences     Open Access  
Information Processing in Agriculture     Open Access  
Sabaragamuwa University Journal     Open Access  
Ceiba     Open Access  
Research in Sierra Leone Studies : Weave     Open Access  
The Agriculturists     Open Access  
La Calera     Open Access  
Selçuk Tarım ve Gıda Bilimleri Dergisi     Open Access  
Revista de la Universidad del Zulia     Open Access  
Journal of Arid Land     Hybrid Journal  
Rangifer     Open Access  
Encuentro     Open Access  
Journal Of Agrobiotechnology     Open Access  
Coffee Science     Open Access  
Bangladesh Journal of Scientific Research     Open Access  
Landbohistorisk Tidsskrift     Open Access  
Biotecnología en el Sector Agropecuario y Agroindustrial     Open Access  
Walailak Journal of Science and Technology     Open Access  
Universidad y Ciencia     Open Access  
Tropical and Subtropical Agroecosystems     Open Access  
Terra Latinoamericana     Open Access  
Revista Iberoamericana de Tecnologia Postcosecha     Open Access  
Revista Brasileira de Ciências Agrárias     Open Access  
Multiciencias     Open Access  
Ensaios e Ciência : Ciências Biológicas, Agrárias e da Saúde     Open Access  
Bioagro     Open Access  
Agroalimentaria     Open Access  
Revista Mexicana de Ciencias Agrícolas     Open Access  
Revista U.D.C.A Actualidad & Divulgación Científica     Open Access  
Revista Ciencias Técnicas Agropecuarias     Open Access  
Revista Chapingo. Serie horticultura     Open Access  
Pastos y Forrajes     Open Access  
Fitosanidad     Open Access  
Cultivos Tropicales     Open Access  
Cuadernos de Desarrollo Rural     Open Access  
Ciencia e Investigación Agraria     Open Access  
Agronomía Mesoamericana     Open Access  
Agronomía Costarricense     Open Access  
Agrociencia     Open Access  
Agrivita : Journal of Agricultural Science     Open Access  

  First | 1 2 3 4     

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Journal Cover
Journal of Agricultural Engineering
Journal Prestige (SJR): 0.449
Citation Impact (citeScore): 2
Number of Followers: 2  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1974-7071 - ISSN (Online) 2239-6268
Published by PAGEPress Homepage  [52 journals]
  • Effects of the twin-row planter with subsoiling on soybean growth and
           yield in northern China

    • Authors: Wenjun Wang, Sihao Zhang, Jingyu Li, Pengfei Zhang, Yulong Chen
      Abstract: Twin-row ridge cultivation is widely used in soybean planting in northern China. In order to find the optimal parameters of soybean agronomy, the twin-row planter with subsoiling was designed. Field experiments were conducted to evaluate the effects of plant arrangements and cluster densities on soybean growth and grain yield under different tillage treatments. The experiment used a randomised complete block design consisting of 20 treatments in a 2×2×5 factorial arrangement. Two tillage treatments were inter-row subsoiling and no subsoiling. Each tillage treatment included the combination of plant arrangements (side-by-side arrangement and triangular arrangement) and cluster densities (one, two, three, four, and five plants). The variables measured included soil moisture content, seedling emergence, biomass accumulation and allocation, and grain yield. We have concluded that the performance of inter-row subsoiling treatment was much better than that of no subsoiling treatment. Meanwhile, the triangular arrangement and two plants per cluster were the best choices for soybean biomass accumulation and grain yield in northern China. This study provided a reference for the innovative design of the twin-row planter with subsoiling and the optimisation of soybean agronomy.
      PubDate: 2022-09-09
      DOI: 10.4081/jae.2022.1359
      Issue No: Vol. 53, No. 3 (2022)
       
  • Development and performance evaluation of an oil palm harvesting robot for
           the elimination of ergonomic risks associated with oil palm harvesting

    • Authors: Ayodeji Nathaniel Oyedeji, Umar Ali Umar, Laminu Shettima Kuburi, Albright Abu Edet, Yau Mukhtar
      Abstract: This study was aimed at developing and evaluating the performance of an oil palm fresh fruit bunch harvesting robot that will eliminate the possible risks associated with oil palm harvesting. The result of this study showed that the average height of oil palm trees in the study area was 5.531 m, which shows the unsuitability of the existing traditional methods in the harvesting process. This study also used a geared DC motor to develop an oil palm harvester, solving the stability issue encountered by previous researchers during the harvesting process without necessarily reducing the climbing speed by a wide margin. In addition, the use of geared DC motor help in the production of high torque for the climbing process, and due to this high torque, instability during the harvesting process was reduced.
      PubDate: 2022-09-09
      DOI: 10.4081/jae.2022.1388
      Issue No: Vol. 53, No. 3 (2022)
       
  • Monitoring mini-tomatoes growth: A non-destructive machine vision-based
           alternative

    • Authors: Fernando Ferreira Abreu, Luiz Henrique Antunes Rodrigues
      Abstract: Yield is the most often used metric of crop performance, and it can be defined as the ratio between production, expressed as a function of mass or volume, and the cultivated area. Estimating fruit’s volume often relies on manual measurements, and the procedure precision can change from one person to another. Measuring fruits’ mass will also destroy the samples; consequently, the variation will be measured with different samples. Monitoring fruit’s growth is either based on destructive tests, limited by human labour, or too expensive to be scaled. In this work, we showed that the cluster visible area could be used to describe the growth of mini tomatoes in a greenhouse using image processing in a natural environment with a complex background. The proposed method is based on deep learning algorithms and allows continuous monitoring with no contact with the cluster. The images are collected and delivered from the greenhouse using low-cost equipment with minimal parameterisation. Our results demonstrate that the cluster visible area accumulation is highly correlated (R²=0.97) with growth described by a parameterised Gompertz curve, which is a well-known growth function. This work may also be a starting point for alternative growth monitoring methods based on image segmentation. The proposed U-Net architecture, the discussion about its architecture, and the challenges of the natural environment may be used for other tasks in the agricultural context.
      PubDate: 2022-09-09
      DOI: 10.4081/jae.2022.1366
      Issue No: Vol. 53, No. 3 (2022)
       
  • Optimal design of transplanting mechanism with differential internal
           engagement non-circular gear trains

    • Authors: Maile Zhou, Jiajia Yang, Tingbo Xu, Jianjun Ying, Xinzhong Wang
      Abstract: This study aimed at the problems of unequal speed transmission ratio mutual restriction and side gap accumulation of the transplanting mechanism with single-degree-of-freedom K-H-V non-circular planetary gear train, which leads to poor trajectory and attitude, and poor precision of movement. This study has proposed a simple structure of transplanting mechanism with differential internal engagement non-circular planetary gear trains, which reconstructs the complex transplanting trajectory and attitude of the planting arm through single-stage unequal speed transmission. The working principle of the transplanting mechanism was analysed, and the kinematic theoretical model of the transplanting mechanism was established. The optimal design software for the transplanting mechanism was developed based on the visual platform. The dimensions optimisation on the transplanting mechanism was completed considering the requirements with strong coupling, and multi-objective and a set of superior mechanism parameters were obtained. The design theory and method of the internal engagement non-circular gear pair were proposed based on the generating principle. The correctness and accuracy of the trajectory and attitude of the transplanting mechanism were verified through virtual simulation experiments. The experiments show that the designed transplanting mechanism with internal engagement non-circular planetary gear trains was compact in structure, the trajectory meets the requirements of multi-objective transplanting, and the trajectory and attitude can be accurately reproduced, which provides a new feasible solution for the innovative design of the transplanting mechanism.
      PubDate: 2022-09-09
      DOI: 10.4081/jae.2022.1412
      Issue No: Vol. 53, No. 3 (2022)
       
  • Power need of an implement for removing polymer residues from the soil
           surface in Kazakh horticulture

    • Authors: Adilkhan Niyazbayev, Francesco Garbati Pegna, Kanat Khazimov, Erik Umbetov, Kulmuhanbet Akhmetov, Zhadyra Sagyndykova, Marat Khazimov
      Abstract: Polymeric materials are largely used in horticulture for mulching and irrigation, but their long degradation time causes various environmental and agronomic problems, hence should be removed at the end of the crop cycle. Among different mechanised techniques for collecting polymer residues from the field, the single- phase one is the most effective, since the plastic film and irrigation tape lifting, cleaning, and collection operations are done in a single pass, though, in most cases, the implements used in Kazakhstan still need an operator to manage the winding mechanism. The authors, who developed a completely automatic plastic retriever based on a hydraulic drive with a friction clutch for winding up the plastic materials, assessed the power need of the implement in order to compare it with the power need of similar implements, where the winding mechanism is hand-operated. Consequently, power consumption is high due to the need to stop and start the engine many times. In this study, the parameters of the hydraulic drive were determined by analytical calculation, starting from pressure and speed data measured on the hydraulic line and velocity and traction resistance of the implementation measured during the field tests. The maximum power needed to drive the winding mechanisms resulted in 1.86 kW at a forward speed of the unit of 1.8 m⋅s–1. Secondary, the operation costs were broadly assessed, finding that they were about 43% less than when using man-driven equipment.
      PubDate: 2022-07-20
      DOI: 10.4081/jae.2022.1382
      Issue No: Vol. 53, No. 3 (2022)
       
  • Effect of envelope characteristics on the accuracy of discretised
           greenhouse model in TRNSYS

    • Authors: Qazeem Opeyemi Ogunlowo, Wook Ho Na, Anis Rabiu, Misbaudeen Aderemi Adesanya, Timothy Denen Akpenpuun, Hyeon Tae Kim, Hyun Woo Lee
      Abstract: TRNSYS is a standard tool recently used to model and simulate greenhouse energy demand and utilisation using building energy simulation (BES). Previously, a single thermal point was used for validation, ignoring the distribution of greenhouse climate parameters, especially the temperature. Temperature variation often leads to thermal stratification, prompting researchers to propose volume discretisation in dynamic greenhouse simulations. In this context, the effect of envelope characterisation on the accuracy of the discretised TRNSYS BES model was developed to determine the best BES model under a free-floating regime. The combination of the number of layers [double (D) and single (S)], geometry mode [3D and manual (M)], and layer type [massless (M) and no glazing window (W)], led to the development of five models: D_3D_M, D_3D_W, D_M_M, S_3D_W, and S_M_M. The simulation was performed in a standard radiation mode, and the output parameters were temperature and relative humidity (RH). R2 and the root square mean error (RSME) were used to check the fitness and degree of deviation, respectively, to validate the models. Analysis of variance (ANOVA) was employed to investigate the significant differences among the models, whereas contour plots were used to compare the distribution pattern between the significant models and experimental data. Validation of the models showed that the obtained R2 values ranged from 0.86 to 0.95, and the RSME values for the temperature were between 2.64°C and 3.91°C. These values were 0.91-0.93 and 19.72%-30.32% for RH. The ANOVA (P<0.05) result exhibited significant differences between the S-scenario models and experimental central points in temperature and RH. However, the D- and S-layer scenarios with a 3D geometry and massless layer showed similar distribution with their corresponding experimental greenhouses. Hence, 3D_M was regarded as the best combination in the discretised BES model.
      PubDate: 2022-07-07
      DOI: 10.4081/jae.2022.1420
      Issue No: Vol. 53, No. 3 (2022)
       
  • Effect of tillage implement (spring tine cultivator, disc harrow), soil
           texture, forward speed, and tillage depth on fuel consumption and tillage
           quality

    • Authors: Vidas Damanauskas, Algirdas Janulevičius
      Abstract: Over the years, tillage became less intense due to environmental safety requirements to minimise fuel and labour time. Mainly, this is achieved by reducing the depth of tillage. However, highly cut winter rape stubble is the main challenge for reduced tillage to prepare clear soil, especially as the summer droughts intensify. This study aimed to determine the optimal tillage performances of the spring tine cultivator and compact disc harrow and establish the fuel consumption required to achieve the preferred level of soil structure formation and residue incorporation on loam and clay loam soil after a rape harvest. The fuel consumption depends on the desired level of soil tillage intensity, implement type, tillage depth (5 and 8 cm), and forward speed (1.4, 1.9, 2.5, 3.1, and 3.6 m∙s–1). The tractor ‘CASE IH 135’ was instrumented with a different data acquisition system and was used to perform the indicators of stubble tillage. The research examines the dependence of the tractor-implement regime mode on the soil aggregate ratio, which varied from 0.10 to 0.21, and the residue interblending ratio, which varied from 0.60 to 0.96. The relationship was established by obtaining the tillage quality level and reduced fuel consumption, which varied from 3.4 to 5.9 L·ha–1, depending on soil type. Minimising fuel consumption and sufficient quality of oilseed rape stubble cultivation was achieved by reducing the depth but not the tillage speed.
      PubDate: 2022-07-07
      DOI: 10.4081/jae.2022.1371
      Issue No: Vol. 53, No. 3 (2022)
       
  • Simulation study and field experiments on the optimal canopy shaking
           action for harvesting Camellia oleifera fruits

    • Authors: Xiaoqiang Du, Tengfei Shen, Kaizhan Chen, Guofeng Zhang, Xiaohua Yao, Juanjuan Chen, Yongqing Cao
      Abstract: With the increasing cultivation scale of Camellia oleifera in China, the demand for mechanical harvesting machinery is very urgent. Inefficient fruit harvesting has become a bottleneck hindering the development of the C. oleifera industry. In order to achieve high fruit harvesting percentage and low detachment percentage of the flower buds, a canopy shaking mechanism is proposed for massively harvesting C. oleifera fruits which applies the reciprocating linear motion of multiple beating-bar arrays to the tree canopy. The multiple beating-bar arrays driven by the eccentric disk can generate comb-brushing effects on the tree canopy. Three kinds of C. oleifera tree architecture were modelled, and their dynamics were simulated by finite element analysis. Their modal analysis results show that the low-order natural frequencies of the C. oleifera trees with different canopy shapes are very close. According to harmonic response analysis, the low-frequency excitation is used to harvest C. oleifera fruit. The orthogonal experiments were carried out on the canopy shaker prototype with the motor speed, reciprocating stroke, and duration of vibration as the influencing factors, and the fruit harvesting percentage and the detachment percentage of the flower buds as the evaluation indices. The results show that the same optimal parameter combination can be used for three kinds of C. oleifera tree architecture, in which the motor speed is 360 r/min, the reciprocating stroke is 80 mm, and the duration of the vibration is 8 s. The average fruit harvesting percentage is 72.3%, and the average detachment percentage of the flower buds is 13.9%.
      PubDate: 2022-06-30
      DOI: 10.4081/jae.2022.1245
      Issue No: Vol. 53, No. 3 (2022)
       
  • An intelligent system for detecting Mediterranean fruit fly [Medfly;
           Ceratitis capitata (Wiedemann)]

    • Authors: Yusuf Uzun, Mehmet Resit Tolun, Halil Tanyer Eyyuboglu, Filiz Sarı
      Abstract: Nowadays, the most critical agriculture-related problem is the harm caused to fruit, vegetable, nut, and flower crops by harmful pests, particularly the Mediterranean fruit fly, Ceratitis capitata, named Medfly. Medfly’s existence in agricultural fields must be monitored systematically for effective combat against it. Special traps are utilised in the field to catch Medflies which will reveal their presence and applying pesticides at the right time will help reduce their population. A technologically supported automated remote monitoring system should eliminate frequent site visits as a more economical solution. This paper develops a deep learning system that can detect Medfly images on a picture and count their numbers. A particular trap equipped with an integrated camera that can take photos of the sticky band where Medflies are caught daily is utilised. Obtained pictures are then transmitted by an electronic circuit containing a SIM card to the central server where the object detection algorithm runs. This study employs a faster region-based convolutional neural network (Faster R-CNN) model in identifying trapped Medflies. When Medflies or other insects stick on the trap’s sticky band, they spend extraordinary effort trying to release themselves in a panic until they die. Therefore, their shape is badly distorted as their bodies, wings, and legs are buckled. The challenge is that the deep learning system should detect these Medflies of distorted shape with high accuracy. Therefore, it is crucial to utilise pictures containing trapped Medfly images with distorted shapes for training and validation. In this paper, the success rate in identifying Medflies when other insects are also present is approximately 94%, achieved by the deep learning system training process, owing to the considerable amount of purpose-specific photographic data. This rate may be seen as quite favourable when compared to the success rates provided in the literature.
      PubDate: 2022-06-30
      DOI: 10.4081/jae.2022.1381
      Issue No: Vol. 53, No. 3 (2022)
       
  • Design and experiment of a control system for sweet potato
           seedling-feeding and planting device based on a pre-treatment seedling
           belt

    • Authors: Yufan He, Qingzhen Zhu, Weiqiang Fu, Changhai Luo, Yue Cong, Wuchang Qin, Zhijun Meng, Liping Chen, Chunjiang Zhao, Guangwei Wu
      Abstract: Although existing sweet potato transplanters require automatic seedling feeding instead of manual seedling feeding, this causes seedling leakage and low efficiency. In this work, a control system for automatic seedling feeding of sweet potatoes was designed based on a pre-treatment seedling belt. The system uses STM32 as the main controller and obtains the running speed of the machine through the encoder. The speed of the planting motor can be adjusted in real-time according to the running speed to keep the planting distance stable. The speed control model and linkage control strategy of seedling-feeding and planting motors are investigated to keep the system feeding frequency and planting frequency consistent under running speed changes. In order to verify the performance of this control system, a test bench was built, and some experiments were conducted. The test results show that the average error of seedling-feeding motor speed is 4.04%, and that of planting motor speed is 3.28%. At medium and low operating speed levels, the stability of the seedling-feeding mechanism is good, and the relative errors of automatic seedling-feeding operation are 7.8% and 5.1%, respectively. The variation coefficients of plant spacing were 9.34% and 7.42%, respectively, indicating that the system could meet the seedling-feeding and planting device control requirements based on the seedling belt and realise continuous automatic seedling feeding in the process of sweet potato seedling transplanting.
      PubDate: 2022-06-30
      DOI: 10.4081/jae.2022.1261
      Issue No: Vol. 53, No. 3 (2022)
       
 
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