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Journal articles on the topic 'Seed movement'

Author: Grafiati

Published: 6 June 2025

Last updated: 2 August 2025

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1

Fredriksson, Martin. "Open Source Seeds and the Revitalization of Local Knowledge." Sustainability 13, no. 21 (2021): 12270. http://dx.doi.org/10.3390/su132112270.

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This article engages with the resistance against the global erosion of seed diversity following the modernization and industrialization of agriculture over the 20th century. This resistance spans from local farming communities that preserve and safeguard traditional landraces to international movements which oppose proprietary seed regulations and promote free sharing of seeds. The article focuses on the latter and presents a study of the open source seed movement: an initiative to apply strategies from the open source software movement to ensure the free circulation of seeds. The erosion of s

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Demeulenaere, Elise. "A political ontology of seeds." Focaal 2014, no. 69 (2014): 45–61. http://dx.doi.org/10.3167/fcl.2014.690104.

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This article follows the trajectory of a French farmers' movement that contests the seed production and regulation system set in place during agricultural modernization. It focuses on the creativity of the movement, which ranges from semantic innovations (such as “peasant seeds”) to the reinvention of onfarm breeding practices based on new scientific paradigms, and includes new alliances with the social movements defending the commons. The trajectory of the movement is shaped by its encounters—with scientists, other international seed contestations, and other social movements—and by the produc

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Amarasinghe, Yaddehige P. J., Mitsuharu Otsuka, Sathya Lim, Ryo Ishikawa, and Takashige Ishii. "The role of wild rice (Oryza rufipogon) awns in seed dispersal." Seed Science Research 30, no. 4 (2020): 319–24. http://dx.doi.org/10.1017/s096025852000046x.

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AbstractCultivated rice (Oryza sativa L.) was domesticated from the Asian wild species O. rufipogon. Compared with cultivated rice, wild rice has spikelets/seeds with long barbed awns. In order to evaluate the role of awns in wild rice, four seed groups with different awn lengths (full, half, quarter and no awns) were prepared, and the following seed dispersal movements were investigated under simulated natural conditions as observed in the tropical Asian habitat: (1) seed detachment from the parent plant; (2) falling angle of mature seed; (3) ability to slip into small spaces; (4) horizontal

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Tilini, Kassie L., Susan E. Meyer, and Phil S. Allen. "Seed bank dynamics of blowout penstemon in relation to local patterns of sand movement on the Ferris Dunes, south-central Wyoming." Botany 95, no. 8 (2017): 819–28. http://dx.doi.org/10.1139/cjb-2017-0016.

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Plants restricted to active sand dunes possess traits that enable both survival in a harsh environment and local migration in response to a shifting habitat mosaic. We examined seed bank dynamics of Penstemon haydenii S. Watson (blowout penstemon) in relation to local sand movement. We measured within-year sand movement along a 400 m transect and examined plant density, seed production, and seed density in relation to this movement. Plant densities were highest in areas of moderate sand movement. Annual seed rain averaged 13 seeds·m−2, whereas persistent seed bank density (0–10 cm depth) avera

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Davis, Adam S., and Edward C. Luschei. "Living Boundaries: Tracking Weed Seed Movement With Nondormant Seed." Weed Science 57, no. 2 (2009): 163–68. http://dx.doi.org/10.1614/ws-08-148.1.

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Synthetic seed banks are a useful tool for tracking how weed populations change over time. By sowing a known number of seeds of a given species within a quadrat with defined boundaries, an investigator can measure the number remaining and thereby calculate demographic rates (e.g., mortality). The alternative is to use in situ seeds and estimate their initial population density via sampling. To make a synthetic seed bank approach useful within an agricultural system subjected to soil disturbances such as tillage, one would need a way to account for seeds leaving the initial quadrat (i.e., a way

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Liao, Yangyang, Yong You, Yunting Hui, Xuening Zhang, and Decheng Wang. "Mixed Seeds of Oat and Vetch Based on DEM-Fluent Coupling Motion Simulation in a Venturi Tube." Processes 11, no. 4 (2023): 1095. http://dx.doi.org/10.3390/pr11041095.

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The gas–solid flow of mixed seeds of oat and vetch in the air-blowing venturi tube was simulated numerically by means of a coupling approach of the discrete element method (DEM) and computational fluid dynamics (CFD). In the gas–solid coupling model, EDEM software was used to depict the discrete particle phase, and ANSYS Fluent software was used to describe the continuous gas phase. The effects of the seed entry angle and inlet air velocity on the uniformity of mixed seed supply were studied and analyzed from the angle of airflow field variation and mixed seeds movement characteristics. The si

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Bogus, Azamat E. "Analytical study of uneven distribution of seeds by a centrifugal distributor." E3S Web of Conferences 193 (2020): 01018. http://dx.doi.org/10.1051/e3sconf/202019301018.

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The operating and geometric parameters of the seed movement in the centrifugal distributor of pneumatic grain seeders were studied on the basis of the equation of seed movement. The methodology of evaluation of the non-uniform distribution of seeds between the seed tubes is shown. The parameters of the centrifugal distributor that ensure minimal unevenness are determined.

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Litvinov, Maksim. "Study of the process of seed movement in the seed duct and the impact on the operation of a multi-level seeding system." E3S Web of Conferences 285 (2021): 07019. http://dx.doi.org/10.1051/e3sconf/202128507019.

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In this paper, we consider the study of the process of seed movement in the seed duct and the impact on the operation of a multi-level seeding system. Mathematical models of the movement of the seed material from the seeder to the plowshare group along the seed line are obtained. To a greater extent, the movement time is affected by the weight of the sown portion and the initial speed of the seeds when falling from the seeder. Also, in straight sections, the time depends on the geometric parameters of the seed line. In the future, the formula of the complete transfer of seeds from the seeder t

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Manshardt, Richard M., Cathy Mello, Sharon D. Lum, and Leanne Ta. "Tracking Papaya Pollen Movement with the GUS Transgene Marker." HortScience 40, no. 4 (2005): 1094D—1094. http://dx.doi.org/10.21273/hortsci.40.4.1094d.

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Genetically engineered (GE), virus-resistant papaya cultivars in Hawaii are easily identified by a colorimetric assay for the β-glucuronidase (GUS) marker transgene. We used GUS to track pollen movement from a central 1-acre plot of gynodioecious GE `Rainbow' plants into seeds on surrounding border rows of non-GE `Sunrise' papaya. GUS evidence of cross-pollination occurred in 70% of female plants (43% of assayed seeds), compared with only 13% of the predominantly self-pollinating hermaphrodite plants (7% of seeds) segregating in the gynodioecious `Sunrise' border rows. The percentage of GUS+ s

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Hoai, Phan T. T., Stephen D. Tyerman, Nicholas Schnell, et al. "Deciphering aquaporin regulation and roles in seed biology." Journal of Experimental Botany 71, no. 6 (2020): 1763–73. http://dx.doi.org/10.1093/jxb/erz555.

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Abstract Seeds are the typical dispersal and propagation units of angiosperms and gymnosperms. Water movement into and out of seeds plays a crucial role from the point of fertilization through to imbibition and seed germination. A class of membrane intrinsic proteins called aquaporins (AQPs) assist with the movement of water and other solutes within seeds. These highly diverse and abundant proteins are associated with different processes in the development, longevity, imbibition, and germination of seed. However, there are many AQPs encoded in a plant’s genome and it is not yet clear how, when

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Edwards, D. G. W., D. F. W. Pollard, and B. S. P. Wang. "Guidelines for Grading and Labeling Forest Tree Seeds in Canada." Forestry Chronicle 64, no. 4 (1988): 334–44. http://dx.doi.org/10.5558/tfc64334-4.

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Guidelines for grading and labeling forest tree seeds in Canada are presented. The Guidelines will enhance forest management by providing minimum standards for labeling, and by encouraging the application of internationally-recognized grading procedures to domestic seed movements. Their adoption should deter the importation and movement of undesirable seeds, and will permit the gazetting of long-distance movements of tree seeds within Canada. They are proposed for acceptance by provincial and territorial agencies, industry and professional organizations concerned with the sale and movement of

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Perry, George L. W. "How far might plant-eating dinosaurs have moved seeds?" Biology Letters 17, no. 1 (2021): 20200689. http://dx.doi.org/10.1098/rsbl.2020.0689.

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Fossilized gut contents suggest that seeds consumed by dinosaurs may have remained intact in their stomachs, and since seed dispersal distance increases with body-mass in extant vertebrates, dinosaurs may have moved seeds long distances. I simulated seed dispersal by dinosaurs across body-masses from 1 × 10 1 to 8 × 10 4 kg using allometric random walk models, informed by relationships between (i) body-mass and movement speed, and (ii) body-mass and seed retention time. Seed dispersal distances showed a hump-shaped relationship with body-mass, reflecting the allometric relationship between max

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Redstone, Sara, and Adrian Fox. "The biosecurity risks of seeds in a botanic garden context." Sibbaldia: the International Journal of Botanic Garden Horticulture, no. 20 (June 4, 2021): 147–62. http://dx.doi.org/10.24823/sibbaldia.2021.341.

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Seeds present a naturally occurring package of germplasm with ideal attributes for collection, distribution and, in the case of orthodox seed, long term storage. From a phytosanitary perspective seeds are often considered a relatively low-risk option for movement of germplasm across borders. Most published data are concerned with diseases of commercial crops and little is known about the risks associated with wild collected, non-commercial seeds. However, there is demonstrable risk associated with the movement of any plant germplasm which can pose a risk to both crops and the wider environment

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Lambeth, Clem, Steve McKeand, Randy Rousseau, and Ron Schmidtling. "Planting Nonlocal Seed Sources of Loblolly Pine – Managing Benefits and Risks." Southern Journal of Applied Forestry 29, no. 2 (2005): 96–104. http://dx.doi.org/10.1093/sjaf/29.2.96.

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Abstract Seed source testing of loblolly pine (Pinus taeda), which began in the 1920s, has allowed large realized genetic gains from using nonlocal seed sources in operational plantations. Seed source testing continues, and deployment guidelines are still being refined. Some general effects of seed source movement can be described, but there are still gaps in (1) understanding exactly how far certain seed sources can be moved, (2) the degree of risk involved, and (3) how certain traits such as wood quality vary by seed source, especially with seed source movement. In some cases, seed source mo

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Turgunov, Dilmurod, Nodirbek Oripov, Bekzod Mominov, and Dildora Khalilova. "Analysis of the dynamic model of seed movement in the pneumotransport system." E3S Web of Conferences 538 (2024): 03006. http://dx.doi.org/10.1051/e3sconf/202453803006.

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High-quality delivery of seeds separated from the fiber to the next process is considered one of the most important processes of the technological process. In the article, the seed transport equipment is designed and prepared practically, and the screw conveyor is developed in a new way, which carries out the cleaning process as well as transferring the seeds separated from the fiber to the next technological process. This separator separates the seed from the air and cleans it of dirt and loose fibers. It is possible to improve the quality of the product by increasing the efficiency of the se

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16

PLYAKA, VALERIY I. "STAND-TESTING OF AN EXPERIMENTAL SEED DRILL FOR SOWING LAWN GRASS." Agricultural engineering, no. 5 (2022): 24–29. http://dx.doi.org/10.26897/2687-1149-2022-5-24-29.

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The rational movement of a seeding unit when sowing lawn grasses requires the seed drill to move both along straight-line and curvilinear trajectories, thus enabling it to sideslip possible obstacles, while maintaining uniform sowing. To ensure uniform sowing during a curved path, a different amount of seed material is required to enter the soil from the seed wheels, which travel distances of different radii. To check the indices of the non-uniformity of sowing between units and the general variability of sowing at rectilinear and curvilinear movement, the experimental seed drill SV-0.9 equipp

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Smith, Loren M., and John A. Kadlec. "The effects of disturbance on marsh seed banks." Canadian Journal of Botany 63, no. 12 (1985): 2133–37. http://dx.doi.org/10.1139/b85-301.

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Seed numbers and the species composition of seed banks (germinable seeds) from a marsh adjacent to the Great Salt Lake were compared among five vegetation types prior to a drawdown, during a drawdown, and prior to fire, after fire, and after restoration of normal water levels. Substrate samples were processed in the greenhouse under submersed and moist soil treatments to simulate the two germination conditions found in the field. After the fire, seed movement into the different vegetation types was also estimated. Numbers of germinable seeds were not depleted during the drawdown, possibly owin

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18

Benvenuti, Stefano. "Natural weed seed burial: effect of soil texture, rain and seed characteristics." Seed Science Research 17, no. 3 (2007): 211–19. http://dx.doi.org/10.1017/s0960258507782752.

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AbstractTrials were carried out to investigate natural weed seed burial in a no-till agricultural system. With this aim, 30 important weed species were selected to explore if, and to what extent, seed vertical movement is conditioned by soil texture, cumulative rainfall or by seed characteristics. Without soil tillage, the vertical position of the seeds was only a few millimetres below the surface, but it was dependent on soil texture. Seed burial was much slower (and to lesser depths) in clay soils than in sandy soils. Seeds reached greater depths after 1 year in sandy soil (10% >6 mm) tha

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Dunham, Amy E. "Soil disturbance by vertebrates alters seed predation, movement and germination in an African rain forest." Journal of Tropical Ecology 27, no. 6 (2011): 581–89. http://dx.doi.org/10.1017/s0266467411000344.

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Abstract:Biopedturbation, or animal-caused soil disturbance, may be important for development and maintenance of small-scale heterogeneity in ecosystems with the potential to alter seed mortality and recruitment. However, its role in tropical forests has been largely ignored. This study explored effects of vertebrate biopedturbation on seed (1) microsite heterogeneity, (2) predation and (3) germination in a West African rain forest. Exclosure experiments were used to study how biopedturbation altered burial and movements of seeds of four common canopy species. Effect of seed burial on removal

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Rehm, E., E. Fricke, J. Bender, J. Savidge, and H. Rogers. "Animal movement drives variation in seed dispersal distance in a plant–animal network." Proceedings of the Royal Society B: Biological Sciences 286, no. 1894 (2019): 20182007. http://dx.doi.org/10.1098/rspb.2018.2007.

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Frugivores play differing roles in shaping dispersal patterns yet seed dispersal distance is rarely quantified across entire communities. We model seed dispersal distance using gut passage times and bird movement for the majority (39 interactions) of known bird–tree interactions on the island of Saipan to highlight differences in seed dispersal distances provided by the five avian frugivores. One bird species was found to be a seed predator rather than a disperser. The remaining four avian species dispersed seeds but differences in seed dispersal distance were largely driven by interspecific v

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Sudrajat, Dede J., Kurniawati P. Putri, and Rizky Ary Fambayun. "Implementation Strategy of Forest Tree Seed in South Kalimantan Province." Jurnal Perbenihan Tanaman Hutan 8, no. 2 (2020): 91–106. http://dx.doi.org/10.20886/bptpth.2020.8.2.91-106.

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The green revolution movement is an action to change people's behavior quickly and precisely to care for environment quality through planting activities in South Kalimantan Province. This movement requires the quality forest tree seed supply, thus requiring research to determine an integrated and systematic strategy for developing forest tree seed programs in South Kalimantan in the next 10 years. SWOT analysis (strengths, weaknesses, opportunities, threats) with the analytical hierarchy process approach is used to determine the planning strategy. The results of the analysis show that the posi

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Avazbek, Obidov, and Sultonov Mirzaolim. "Theoretical Study of Seed Movement in Cotton Seeds Selection Device." Engineering 13, no. 10 (2021): 544–53. http://dx.doi.org/10.4236/eng.2021.1310039.

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Lenz, Johanna, Wolfgang Fiedler, Tanja Caprano, et al. "Seed-dispersal distributions by trumpeter hornbills in fragmented landscapes." Proceedings of the Royal Society B: Biological Sciences 278, no. 1716 (2011): 2257–64. http://dx.doi.org/10.1098/rspb.2010.2383.

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Frugivorous birds provide important ecosystem services by transporting seeds of fleshy fruited plants. It has been assumed that seed-dispersal kernels generated by these animals are generally leptokurtic, resulting in little dispersal among habitat fragments. However, little is known about the seed-dispersal distribution generated by large frugivorous birds in fragmented landscapes. We investigated movement and seed-dispersal patterns of trumpeter hornbills ( Bycanistes bucinator ) in a fragmented landscape in South Africa. Novel GPS loggers provide high-quality location data without bias agai

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Huang, Lan-Jie, and Wen-Long Fu. "A water drop-shaped slingshot in plants: geometry and mechanics in the explosive seed dispersal of Orixa japonica (Rutaceae)." Annals of Botany 127, no. 6 (2021): 765–74. http://dx.doi.org/10.1093/aob/mcab017.

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Abstract Background and Aims In angiosperms, many species disperse their seeds autonomously by rapid movement of the pericarp. The fruits of these species often have long rod- or long plate-shaped pericarps, which are suitable for ejecting seeds during fruit dehiscence by bending or coiling. However, here we show that fruit with a completely different shape can also rely on pericarp movement to disperse seeds explosively, as in Orixa japonica. Methods Fruit morphology was observed by hard tissue sectioning, scanning electron microscopy and micro-computed tomography, and the seed dispersal proc

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Just, Michael G., Wade A. Wall, Stacy D. Huskins, and Matthew G. Hohmann. "Effects of Landscape Heterogeneity and Disperser Movement on Seed Dispersal." Ecologies 5, no. 2 (2024): 198–217. http://dx.doi.org/10.3390/ecologies5020013.

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The primacy of endozoochory for the maintenance and expansion of many woody plant populations is well known, but seed dispersal is not well understood for most species. This is especially true for rare species, where small population size and low fruit production can limit field- or observation-based experiments. Additionally, the effect of environmental heterogeneity on disperser movement is rarely investigated but has been shown to improve estimates of plant population spatial patterns and dynamics. We used simulation experiments to explore the effects of environmental heterogeneity and disp

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Thill, Donald C., and Carol A. Mallory-Smith. "The nature and consequence of weed spread in cropping systems." Weed Science 45, no. 3 (1997): 337–42. http://dx.doi.org/10.1017/s004317450009295x.

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Weeds spread through movement of seeds and vegetative reproductive propagules. Pollen movement can spread weedy traits, such as herbicide resistance, between related weed and crop species. Weed seeds can spread short or long distances by natural plant dehiscence mechanisms, wind, water, animals, and man&s activities. This symposium paper is a practical review of short-distance spread of weed seeds in and between nearby arable fields and noncrop lands, examining some of the causes of spread and subsequent effects on crop production. Pollen movement, as it affects the spread of herbicide res

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Martínez-Garza, Cristina, Alejandro Flores-Palacios, Marines De La Peña-Domene, and Henry F. Howe. "Seed rain in a tropical agricultural landscape." Journal of Tropical Ecology 25, no. 5 (2009): 541–50. http://dx.doi.org/10.1017/s0266467409990113.

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Abstract:Seed dispersal into fragmented tropical landscapes limits the rate and character of ecological succession between forest remnants. In a novel experiment in recovery of dispersal between forest remnants, 120 1-m2 seed traps were placed in fenced plots in active pasture 90–250 m from forest, and in nearby primary and secondary forests. Total seed rain from December 2006 to January 2008 included 69 135 seeds of 57 woody species. High richness of seed rain of early-successional trees occurred in all habitats, but seed rain of late-successional woody plants was much lower into pastures and

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Jusaitis, Manfred, Birgitte Sorensen, and Lesley Polomka. "Reproductive biology of the endangered Brachycome muelleri (Asteraceae), an endemic herb of Eyre Peninsula, South Australia." Australian Journal of Botany 51, no. 2 (2003): 179. http://dx.doi.org/10.1071/bt02072.

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The reproductive biology of Brachycome muelleri Sonder (Asteraceae) was studied from 1995 to 1997 by using nursery and field experiments. Reproductive development and seed dispersal occupied approximately half of the 4-month growth cycle. Flowers of B. muelleri did not have any obvious self-incompatibility systems and were readily selfed to produce viable seed. It appeared that B. muelleri may be preferentially cross-pollinated under ideal conditions of pollinator visitation, but could revert to self-pollination in the event of outcross failure. Seed dispersal was assisted by the epinastic cur

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Khasanov, Eduard R., Radmir R. Mirzamatov, Airat M. Mukhamedinov, and Andrei M. Yakupov. "STUDY OF THE MECHANICAL IMPACT ON ALFALFA SEEDS IN THE SEEDER TUBE OF A SEEDER ON THE BASIS OF A DIGITAL TWIN." VESTNIK OF THE BASHKIR STATE AGRARIAN UNIVERSITY 67, no. 3 (2023): 141–46. http://dx.doi.org/10.31563/1684-7628-2023-67-3-141-146.

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The article investigates the mechanical impact on alfalfa seeds during their movement in the seed tube of the seeder; for this purpose, a digital twin has been developed that will allow you to determine the speed, force and mechanical stress exerted on the seeds. The developed mathematical model will allow you to select the optimal parameters, determine the disadvantages and advantages of the device, which in turn will allow in the future to use the full potential of the device to improve pre-sowing seed treatment and thereby increase seed germination, providing farm animals with high-quality

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Liu, Rui, Lijing Liu, Yanjun Li, et al. "Numerical Simulation of Seed-Movement Characteristics in New Maize Delivery Device." Agriculture 12, no. 11 (2022): 1944. http://dx.doi.org/10.3390/agriculture12111944.

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The delivery device is one of the key components in ensuring uniform grain spacing and achieving high-speed precision seeding. In this paper, a new type of high-speed airflow-assisted delivery device for maize is presented. The gas–solid flow in the delivery device was numerically studied by the coupling method of CFD and DEM. The influence of the structural parameters of the delivery device on the movement of the seeds and the airflow field was analyzed in detail. The matching relationship between the inlet-airflow velocity and the operating speed of the seeder was explored. The results show

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Nikiforov, Аnton, Аlina Nykyforova, Roman Antoshchenkov, Vitalina Antoshchenkova, Sergey Diundik, and Vladimir Mazanov. "Development of a mathematical model of vibratory non-lift movement of light seeds taking into account the aerodynamic forces and moments." Eastern-European Journal of Enterprise Technologies 3, no. 1 (111) (2021): 70–78. http://dx.doi.org/10.15587/1729-4061.2021.232508.

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The modern practice of using vibratory machines when working with fine-size light-weight seeds is faced with such an undesirable phenomenon as the impact of aerodynamic forces and moments on the kinematics of vibrational movement of particles of the seed mixture fractions. According to the results of scientific studies devoted to the solution of this problem, only mathematical models of vibrational movement are used, where the aerodynamic factor is taken into account as taking the seeds by airflow. This is typical only for cleaning modes with the rebound of seeds from the vibrating surface. Ae

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Аnton, Nikiforov, Nykyforova Аlina, Antoshchenkov Roman, Antoshchenkova Vitalina, Diundik Sergey, and Mazanov Vladimir. "Development of a mathematical model of vibratory non-lift movement of light seeds taking into account the aerodynamic forces and moments." Eastern-European Journal of Enterprise Technologies 3, no. 1 (111) (2021): 70–78. https://doi.org/10.15587/1729-4061.2021.232508.

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The modern practice of using vibratory machines when working with fine-size light-weight seeds is faced with such an undesirable phenomenon as the impact of aerodynamic forces and moments on the kinematics of vibrational movement of particles of the seed mixture fractions. According to the results of scientific studies devoted to the solution of this problem, only mathematical models of vibrational movement are used, where the aerodynamic factor is taken into account as taking the seeds by airflow. This is typical only for cleaning modes with the rebound of seeds from the vibrating surface. Ae

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Gorobey, V. "Theoretical research of seeding of seeds with a tape opener with a roller-distributor." Mehanization and electrification of agricultural, no. 10(109) (2019): 35–46. http://dx.doi.org/10.37204/0131-2189-2019-10-3.

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Purpose. Improvement of the quality of spreading seed of grain seeds by technologies with minimal tillage due to the theoretical based of the interconnection the range of the seeds sowing coulter by a mechanical roller-diffuser in the underpass space of and cultivator type coulter with this design parameters and technological modes. Methods. The research is based on analytical methods and mathematical modeling of agricultural machines and technological operations using the laws of mechanics. Based on the obtained theoretical dependencies, numerical simulation was performed on a computer, graph

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Martín, Isaura, Laura Gálvez, Luis Guasch, and Daniel Palmero. "Fungal Pathogens and Seed Storage in the Dry State." Plants 11, no. 22 (2022): 3167. http://dx.doi.org/10.3390/plants11223167.

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Seeds can harbor a wide range of microorganisms, especially fungi, which can cause different sanitary problems. Seed quality and seed longevity may be drastically reduced by fungi that invade seeds before or after harvest. Seed movement can be a pathway for the spread of diseases into new areas. Some seed-associated fungi can also produce mycotoxins that may cause serious negative effects on humans, animals and the seeds themselves. Seed storage is the most efficient and widely used method for conserving plant genetic resources. The seed storage conditions used in gene banks, low temperature a

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Taylor, A. G., P. S. Allen, M. A. Bennett, K. J. Bradford, J. S. Burris, and M. K. Misra. "Seed enhancements." Seed Science Research 8, no. 2 (1998): 245–56. http://dx.doi.org/10.1017/s0960258500004141.

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AbstractSeed enhancements may be defined as post-harvest treatments that improve germination or seedling growth, or facilitate the delivery of seeds and other materials required at the time of sowing. This definition includes three general areas of enhancements: pre-sowing hydration treatments (priming), coating technologies and seed conditioning. Pre-sowing hydration treatments include non-controlled water uptake systems (methods in which water is freely available and not restricted by the environment) and controlled systems (methods that regulate seed moisture content preventing the completi

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Wang, Baolong, Yi Na, Yihong Pan, Zhenbo Ge, Jian Liu, and Xiwen Luo. "CFD Simulation and Experiments of Pneumatic Centralized Cylinder Metering Device Cavity and Airflow Distributor." Agronomy 12, no. 8 (2022): 1775. http://dx.doi.org/10.3390/agronomy12081775.

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The distribution of airflow field in the pneumatic centralized cylinder metering device cavity, airstream distributor and different angle seed feeding tubes was investigated based on the pneumatic centralized cylinder direct-seeding metering device to study the effect on the movement law of rice seed. In total, three suction hole sizes (1.5 mm, 2 mm and 2.0 mm 45° wedge) were used for CFD simulation. The results showed that under the same inlet vacuum, the pressure at the 1.5 mm hole is higher than the other two types of holes, and the five measurement points of the 2 mm hole are more stable t

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Santos-Heredia, Carolina, and Ellen Andresen. "Upward movement of buried seeds: another ecological role of dung beetles promoting seedling establishment." Journal of Tropical Ecology 30, no. 5 (2014): 409–17. http://dx.doi.org/10.1017/s0266467414000376.

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Abstract:Dung beetles are known to perform important ecological functions, such as secondary seed dispersal of vertebrate-defecated seeds. We found that dung beetles also move buried seeds upwards, with positive consequences for seedling establishment. In the Lacandon rain forest of southern Mexico we conducted field experiments to address three questions: (1) What proportions of different-sized seeds buried by dung beetles are exhumed by them? (2) Does upward relocation of seeds caused by dung beetle activity promote seedling establishment? (3) Does recurrent beetle activity increase seedling

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Zelikov, Vladimir, Vyacheslav Kozlov, Aleksey Skrypnikov, Evgeniy Izvekov, and Elena Kozlova. "MATHEMATICAL MODEL OF MOTION OF A FOREST SEED MATERIAL PARTICLE IN THE OPERATING CHANNEL OF SEPARATOR." Forestry Engineering Journal 11, no. 1 (2021): 123–31. http://dx.doi.org/10.34220/issn.2222-7962/2021.1/11.

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Preparation of high-quality seed material for the needs of forest seed stations aimed at the reproduction of forests with seeds with improved hereditary properties requires the use of special seed cleaning machines. The use of such seeds with improved hereditary properties will provide an increase in the productivity, quality and sustainability of plantations. Seed material of different species has features of surface and shape, taking into account these differences, various machines and installations have been developed and widely used. The need to use special machines for magnetic cleaning i

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Yan, Xiao Yue, Jian Ping Hu, Chuan Tong Lu, and Xun Wang. "Design and Research on the Control System of Magnetic Plate-Type Seeding Production Line." Advanced Materials Research 694-697 (May 2013): 2051–56. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.2051.

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A new magnetic plate-type precision seeding production line and its control system were designed based on the magnetic seed-metering principle. The control system is consisted of DVP-40ES Programmable Logic Controller and LJD-51-XB+ Mico Controller Unit. The PLC control system controls the working flow of the production line. The MCU control system controls turnover movement of the sowing board and up-and-down movement of the seed case for whole tray seed-filling and sowing. Seeding tests for the magnetic powder coated rape seeds showed that the rate of single-seeding, over-seeding and miss-se

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Bhattacharyya, Soumi, and Nirmalya Banerjee. "Influence of Cytokinins on Rhizome Mediated Growth and Morphogenesis of an Endangered Medicinal Orchid Geodorum densiflorum (Lam.) Schltr." Plant Tissue Culture and Biotechnology 30, no. 1 (2020): 65–75. http://dx.doi.org/10.3329/ptcb.v30i1.47792.

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Effects of different nutrient media, vitamins and peptone on in vitro asymbiotic seed germination of Geodorum densiflorum (Lam.) Schltr. were studied. In vitro developed rhizomes were used to determine the influence of cytokinins on growth and morphogenesis. Seed germination and survival rate of protocorms were highest in MS medium compared to other basal media. The protocorms raised through seed germination directly proliferated into rhizomes in later phase of growth and development. Nodal portions of rhizomes further exhibited growth through formation of direct and callus mediated protocorm

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ALIIEV, Elchyn, Petro BEZVERKHNII, and Olha ALIIEVA. "RESULTS OF ANALYTICAL RESEARCH OF THE SEED PROCESSOR OF THE IMPROVED SOWING SECTION OF THE PNEUMATIC SEEDER." ENGINEERING, ENERGY, TRANSPORT AIC, no. 1(124) (April 22, 2024): 73–81. http://dx.doi.org/10.37128/2520-6168-2024-1-8.

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According to preliminary research, the primary factor influencing the accuracy of seed placement by pneumatic seeders is the process of transferring seeds from the metering device to the point of direct entry into the furrow formed by the coulter in the soil. The first factor is related to the high velocity of the air stream, which increases the risk of seed dislodgement from the seed boot and its placement outside the furrow. This problem can be addressed by installing a seed retarder above the seed boot. The second factor lies in the imperfect shape of the seed channel in the seed boot. Seed

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Raghunathan, Nima, Louis François, Eliana Cazetta, Jean-Luc Pitance, Kristel De Vleeschouwer, and Alain Hambuckers. "Deterministic modelling of seed dispersal based on observed behaviours of an endemic primate in Brazil." PLOS ONE 15, no. 12 (2020): e0244220. http://dx.doi.org/10.1371/journal.pone.0244220.

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Plant species models are among the available tools to predict the future of ecosystems threatened by climate change, habitat loss, and degradation. However, they suffer from low to no inclusion of plant dispersal, which is necessary to predict ecosystem evolution. A variety of seed dispersal models have been conceived for anemochorous and zoochorous plant species, but the coupling between vegetation models and seed dispersal processes remains rare. The main challenge in modelling zoochoric dispersal is simulating animal movements in their complex habitat. Recent developments allow straightforw

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Stepanenko, Serhiy, Daryna Volyk, Boris Kotov, and Vitaly Melnyk. "RESEARCH ON THE PROCESSES OF MOTION AND SEPARATION OF COMPONENTS IN SEED MIXTURES IN A VIBROPNEUMATIC ENVIRONMENT." Vibrations in engineering and technology, no. 2(113) (August 30, 2024): 14–23. https://doi.org/10.37128/2306-8744-2024-2-2.

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The article is devoted to the study of the processes of movement and separation of components in a seed mixture under the conditions of a vibro-pneumatic layer. The problem of competitiveness of grain production is highlighted through the use of seeds with high sowing qualities. The conducted research focuses on methods of improving the quality of seeds, in particular on their separation in a vibro-pneumatic environment according to physical and mechanical properties and seed density. The authors indicate a close relationship between sowing qualities and seed density. The study shows that mode

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Bogus, Azamat E. "Investigation of the kinematics of seed movement in the centrifugal distributor of a pneumatic seeder." E3S Web of Conferences 193 (2020): 01017. http://dx.doi.org/10.1051/e3sconf/202019301017.

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Theoretical studies of the seed movement in the centrifugal seed distributor of a pneumgivenatic grain seeder have been performed. There were obtained the equations describing the process of seed movement in a centrifugal seed distributor which allow determining the optimal parameters of the pneumatic system of the seeder. The relationship between the operating and design parameters of the centrifugal distributor is given.

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Stevenson, Pablo, and Adriana Guzmán. "Seed dispersal, habitat selection and movement patterns in the Amazonian tortoise, Geochelone denticulata." Amphibia-Reptilia 29, no. 4 (2008): 463–72. http://dx.doi.org/10.1163/156853808786230442.

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AbstractThe Amazonian tortoise Geochelone denticulata may play an important role in forest dynamics due to its highly frugivorous diet, ability to disperse viable seeds, and predilection for resting in forest gaps for thermoregulation. The purpose of our study was to evaluate the species' effectiveness as a seed disperser. We measured dispersal quantity (abundance of seeds in feces, frequency of droppings, and population density of the disperser) and dispersal quality (movement patterns, habitat use, germination rates of dispersed seeds, and recruitment probabilities of seedlings) in a SW Amaz

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Dellafiore, Claudia Marisel, María José Rosa, and Verónica Scilingo. "¿Does ingestion by birds affect Pyracantha atalantoides (Rosaceae) seed germination?" UNED Research Journal 7, no. 2 (2015): 295–99. http://dx.doi.org/10.22458/urj.v7i2.1156.

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Birds play a fundamental role in many ecosystems because they spread a variety of fruits and seeds through endozoochory. Pyracantha are very attractive for birds, which have contributed to spread this species in natural ecosystems. However, dispersion only is effective if seeds can germinate after passage through of bird digestive tract. Our goal was to assess if birds affect the start, speed and germination rate of P. atalantoides. Germination was compared between seeds from fruit and seed from bird feces. The germination percentage was similar between fruit and feces seeds. However, the seed

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Hogan, J. P., and C. J. C. Phillips. "Transmission of weed seed by livestock: a review." Animal Production Science 51, no. 5 (2011): 391. http://dx.doi.org/10.1071/an10141.

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Weed seeds are readily translocated by livestock by attachment to their coat, by consumption or in vehicles used for transporting them. Livestock transport by land, sea and air is increasing worldwide, which together with increasing livestock production, is anticipated to escalate the risk of weed incursions and displace native flora. There is a particular risk of widespread weed seed dissemination in Australia with its extensive grazing practices and significant amounts of livestock movement. Consumption of weed seeds is largely dependent on grazing management practices, with lax grazing faci

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ANDREEV, SERGEY A. "DETERMINING THE OPERATING PARAMETERS OF THE BELT-TYPE SEED PELLETIZER." Agricultural engineering, no. 3 (2022): 27–32. http://dx.doi.org/10.26897/2687-1149-2022-3-27-32.

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Conventional methods of seed pelleting involve using pelletizers with a drum-type working unit. In these devices, pelleting is carried out in a cyclic mode, which makes operational restrictions and complicates the use of pelletizers in the technological line of complex pre-sowing seed treatment. The authors evaluate the effectiveness of belt-type pelleting machines ensuring the continuity of pelleting and significantly increasing the performance. The paper provides some basic requirements to continuous seed pelletizing. The conditions are determined to describe the pellets rolling down the inc

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Yusubaliev, Ashirbay Sharipov Sherzod Akhmadov Sarvar. "SELECTION OF ELECTRIC ALFALFA CLEANER TECHNOLOGY FROM SEEDS OF QUARANTINE PLANTS." INTERNATIONAL BULLETIN OF APPLIED SCIENCE AND TECHNOLOGY 3, no. 5 (2023): 1152–56. https://doi.org/10.5281/zenodo.7984113.

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Proceeding from basic properties of alfalfa seeds the paper substantiates the constructive scheme of their cleaning from seeds of quarantine plants. For sorting and cleaning of alfalfa seeds the constructive scheme consisting of concentric cylindrical electrodes with increasing intensity of electric field in the direction of seed movement is adopte

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V. V., Ratushnyy V. V., Maranda S. O. S. O, and Kosovets Yu. V. "Justification of the parameters of the mixer of the rotary treater for layer-by-layer treatment of seeds." Mehanization and electrification of agricultural, no. 15(114) (2022): 36–42. http://dx.doi.org/10.37204/0131-2189-2022-15-4.

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Purpose. Increasing the efficiency of the use of pesticides by substantiating the parameters of the mixer of the batch-type rotator for layer-by-layer treatment of seeds, which will ensure the improvement of the quality of seed treatment and ecological safety of the environment. Methods. The study used an analytical and experimental method using Microsoft Office and Mathcad software environments. Results. An analytical expression was obtained for determining the dynamic criterion of the mixer’s operating mode, as a necessary condition for the implementation of the work process of the batch-typ

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