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Journal articles on the topic 'Seed distribution'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2025

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1

Scott, Jeness C., and Jeremiah K. S. Dung. "Distribution of Xanthomonas hortorum pv. carotae Populations in Naturally Infested Carrot Seed Lots." Plant Disease 104, no. 8 (2020): 2144–48. http://dx.doi.org/10.1094/pdis-12-19-2674-re.

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Bacterial blight of carrot (Daucus carota subsp. sativus), caused by the plant-pathogenic bacterium Xanthomonas hortorum pv. carotae, is a common seedborne disease of carrot wherever the crop is grown. Carrot seed lots were evaluated to determine the variability and distribution of populations of X. hortorum pv. carotae among individual carrot seeds. Twenty-four carrot seed lots harvested between 2014 and 2016 were subjected to a bulk seed wash dilution-plate assay to obtain mean X. hortorum pv. carotae levels. Mean infestation levels resulting from the bulk seed wash assays among the 24 seed

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2

Yehnjong, Petra S., Michael S. Zavada, and Chris Liu. "Characterization and ecological significance of a seed bank from the Upper Pennsylvanian Wise Formation, southwest Virginia." Acta Palaeobotanica 57, no. 2 (2017): 165–75. http://dx.doi.org/10.1515/acpa-2017-0017.

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AbstractSoil seed banks are important to the maintenance and restoration of floras. Extant seed banks exhibit unique characteristics with regard to the distribution of seed size and seed density. Seeds were recovered from the Upper Pennsylvanian Wise Formation in southwest Virginia. Structurally preserved seeds were also examined from coal balls of the Pennsylvanian Pottsville and Allegheny Groups, Ohio. The size distribution of the seeds from the Wise Formation is similar to that of structurally preserved seeds of the Upper Pennsylvanian Pottsville and Allegheny Group coal balls. In contrast,

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3

Eti Wulanjari, Munir, Cahyati Setiani, Intan Gilang Cempaka, and Ratih Kurnia Jatuningtyas. "Study of Production and Distribution of Soybean Seeds In Central Java." E3S Web of Conferences 316 (2021): 02019. http://dx.doi.org/10.1051/e3sconf/202131602019.

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The study on the production and distribution of soybean seeds was carried out in January-September 2020. The location of soybean seed production was 33 ha across Central Java Province, Grobogan, Kendal, and Brebes districts. The seeds produced are SS1 class consisting of Grobogan (22 ha), Anjasmoro (10 ha), and Dega 1 (1 ha). Seed production was carried out by cooperating with soybean seed partners. The data collected includes data on prospective soybean seed production, yield, and distribution of soybean seeds. Existing data were analyzed descriptively. The study results showed that the Grobo

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4

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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van Oossanen, Rogier, Jeremy Godart, Jeremy M. C. Brown, et al. "Feasibility Study on the Radiation Dose by Radioactive Magnetic Core-Shell Nanoparticles for Open-Source Brachytherapy." Cancers 14, no. 22 (2022): 5497. http://dx.doi.org/10.3390/cancers14225497.

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Background: Treatment of early-stage breast cancer currently includes surgical removal of the tumor and (partial) breast irradiation of the tumor site performed at fractionated dose. Although highly effective, this treatment is exhaustive for both patient and clinic. In this study, the theoretical potential of an alternative treatment combining thermal ablation with low dose rate (LDR) brachytherapy using radioactive magnetic nanoparticles (RMNPs) containing 103-palladium was researched. Methods: The radiation dose characteristics and emission spectra of a single RMNP were calculated, and dose

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Karayel, Davut, Egidijus Šarauskis, and Ali Aktaş. "Design and Experiment of a Helicoidal Seed Tube to Improve Seed Distribution Uniformity of Seed Drills." Processes 10, no. 7 (2022): 1271. http://dx.doi.org/10.3390/pr10071271.

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In a conventional seed drill, the flow of seeds into the planting bed is usually disrupted and irregular, which contributes to poor seed spacing uniformity. The seed tube of the seed drill may be one of the reasons for disrupted and irregular seed flow. A seed drill, in principle, has to deposit seeds into the ground at a uniform spacing to avoid nutrient competition for optimum yield. This study was inspired to develop a novel helicoidal seed tube that regulates the flow of seeds in a seed tube while being dispensed by the seed drill into the ground. The helicoidal tube was designed to fit th

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Dall, David, Lindsay Penrose, Andrew Daly, Fiona Constable, and Mark Gibbs. "Prevalences of Pospiviroid Contamination in Large Seed Lots of Tomato and Capsicum, and Related Seed Testing Considerations." Viruses 11, no. 11 (2019): 1034. http://dx.doi.org/10.3390/v11111034.

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Analyses of pospiviroids in commercial seed lots of tomato and capsicum, determined by testing of 12,000 to 40,000 seeds per lot, have enabled the development of empirically-derived distribution curves for the observed prevalences of viroids in those commodities. Those distribution curves can be considered in conjunction with statistically-based estimates of detection that would be achieved using other sample sizes. Statistical calculations using binomial distributions show that sample sizes of 3000 and 9400 seeds allow detection of viroid prevalences as low as 0.1% and 0.032%, respectively, w

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8

Jia, Wenjuan, Jiang Zhang, and Baocang Wang. "Hardness of Module-LWE with Semiuniform Seeds from Module-NTRU." IET Information Security 2023 (October 23, 2023): 1–16. http://dx.doi.org/10.1049/2023/2969432.

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The module learning with errors (MLWE) problem has attracted significant attention and has been widely used in building a multitude of lattice-based cryptographic primitives. The hardness of the MLWE problem has been established for several variants, but most of the known results require the seed distribution (i.e., the distribution of matrix A ) to be the uniform distribution. In this paper, we show that under the Module-N-th degree Truncated polynomial Ring Units (NTRU) (MNTRU) assumption, the search MLWE problem can still be hard for some distributions that are not (even computationally ind

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9

Álvarez-Espino, Ricardo, Héctor Godínez-Álvarez, and Rodolfo De la Torre-Almaráz. "Seed banking in the columnar cactusStenocereus stellatus: distribution, density and longevity of seeds." Seed Science Research 24, no. 4 (2014): 315–20. http://dx.doi.org/10.1017/s0960258514000324.

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AbstractThe soil seed bank is the reserve of viable seeds found in the soil. This reserve contributes to plant population persistence in unpredictable environments; thus, determining its presence is basic to understanding recruitment patterns and population dynamics. Studies of soil seed banks in the Cactaceae are scarce, although these plants are ecologically dominant in American arid and semi-arid environments. Most studies have inferred the presence of seed banks by analysing morphological seed traits or germination of seeds stored in the laboratory for different periods of time. Few studie

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10

Reichman, OJ, and E. Roberts. "Computer-Simulation Analysis of Foraging by Heteromyid Rodents in Relation to Seed Distributions - Implications for Coexistence." Australian Journal of Zoology 42, no. 4 (1994): 467. http://dx.doi.org/10.1071/zo9940467.

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A number of hypotheses have been proposed to explain the mechanisms that promote coexistence among sympatric rodents in North American deserts. In an effort to determine how the distribution of seeds influences foraging patterns and coexistence in a three-species community of heteromyid rodents, we developed a computer simulation model that determines the efficiency of foraging for animals of different sizes. Specifically, the simulation determines how long it would take a forager to gather sufficient energy for 24 h if the animal stopped at seed patches of certain densities. The analyses were

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Dellagostin, Simone Morgan, Vinícius Jardel Szareski, Gustavo Henrique Demari, et al. "Seed vigor level in association to fertilizer distribution." Research, Society and Development 9, no. 10 (2020): e5999108658. http://dx.doi.org/10.33448/rsd-v9i10.8658.

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This work aimed at evaluating yielding responses of soybean seeds production fields in response to the association between seed vigor level and fertilizer distribution systems at the sowing line.Experimental design was randomized blocks design, with two growing environments (Passo Fundo - RS and Ernestina - RS) x three vigor levels (high = 90%, medium = 70% and low = 60%) x three fertilizer distribution systems (absence, conventional and by transhipment), arranged in four replicates, grain yield (GY). For grain yield (GY), it was applied the method genotype main effects and genotype environmen

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Togashi, Katsumi, and Shigeru Hoshino. "Distribution pattern and mortality of the white tip nematode, Aphelenchoides besseyi (Nematoda: Aphelenchoididae), among rice seeds." Nematology 3, no. 1 (2001): 17–24. http://dx.doi.org/10.1163/156854101300106847.

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AbstractAphelenchoides besseyi is a seed-borne nematode and the causal agent of rice white tip disease. To determine the relationships between nematode numbers per seed, size of seed harbouring nematodes, and nematode mortality, 18 panicles were collected from 12 paddy fields showing three different levels of white tip disease. The panicles were investigated after storage for 30-82 days at 4°C. There was no nematode mortality within seeds during storage. Mean nematode number per seed increased and mean degree of seed swelling decreased as the paddy field infestation of white tip disease increa

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Salm, Rodolfo. "Arborescent palm seed morphology and seedling distribution." Brazilian Journal of Biology 65, no. 4 (2005): 711–16. http://dx.doi.org/10.1590/s1519-69842005000400018.

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This study examines how the seed morphology of two large arborescent palms, Attalea maripa (Aubl.) Mart. and Astrocaryum aculeatum G. Mey, may affect their seed shadow in a seasonally dry Amazonian forest. In addition to being smaller and produced in larger numbers than those of A. aculeatum, A. maripa seeds also presented a substantially lower amount of nutritional reserves available for the embryo. However, A. maripa seedlings were found in much higher numbers than those of A. aculeatum. The results suggest that, within the spatial scale considered, the seed rain of A. maripa is more restric

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Uzoma, Izuogu, Orji Chukwuebuka, Chinaka Chiemena, Emmanuel Ankrumah, and Joachim Njoku. "A review of the Nigerian seed system." Selekcija i semenarstvo 29, no. 2 (2023): 39–49. http://dx.doi.org/10.5937/selsem2302039i.

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Food insecurity is a major challenge to many households in Nigeria. Many of these households depend on farming to meet their nutritional needs. Seed is an essential input in agricultural production. High-quality seed is essential for improved agricultural productivity, amelioration of food insecurity and improvement in the living standard of farming households. This study is a qualitative investigation of the Nigerian seed system. The National Agricultural Seed Council is responsible for seed certification, distribution, quality control and utilization. Access to certified seeds by farmers in

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15

Kissmann, Camila, and Gustavo Habermann. "Seed germination performances of Styrax species help understand their distribution in Cerrado areas in Brazil." Bragantia 72, no. 3 (2013): 199–207. http://dx.doi.org/10.1590/brag.2013.030.

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In this descriptive paper, we described germination responses of Styrax pohlii, S. camporum and S. ferrugineus seeds at 5, 10, 15, 20, 25, 30, 35, 40 and 45 °C. We also assessed the percentage germination (%G) of S. pohlii seeds with different seed water contents because, as a forest species, it seems to have recalcitrant seed behavior. Intrigued by the capacity of seeds of this species to germinate directly from puddles formed on poorly drained soils of riparian forests, where it typically occurs, we also tested the effect of de-pulping fruits on germination of S. pohlii seeds under hypoxia a

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16

Kai, Yu, Alejandra Alfaro Pinto, Andrea Clavijo McCormick, et al. "Seed Desiccation Sensitivity Varies with Geographic Distribution in Two New Zealand Native Pittosporum Species." Seeds 2, no. 3 (2023): 370–81. http://dx.doi.org/10.3390/seeds2030028.

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Ex situ conservation involves the maintenance and reproduction of species in areas outside their natural habitats. Seed banking is a well-established ex situ approach used for plant conservation. Seed banking consists of collecting, drying, and storing seeds to preserve genetic diversity. The main limitation of this technique is that the seed must be desiccation tolerant. Seed storage behaviour can vary among species, and for some species, drying without loss of viability is not possible, meaning storage under conventional seed banking conditions (sub-zero temperatures and low relative humidit

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17

Galera, Halina, Agnieszka Rudak, Małgorzata Pielech, Anna Znój, Katarzyna J. Chwedorzewska, and Maciej Wódkiewicz. "Influence of the population spatial structure on seed rain distribution of an invasive plant under harsh environment." Polar Biology 44, no. 3 (2021): 587–91. http://dx.doi.org/10.1007/s00300-021-02808-5.

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AbstractDistribution of seeds of an invasive species is important for the spread of the invasion and for any directed eradication action. This distribution is driven by seed rain. We studied the influence of tussocks on the spatial pattern of seed rain and resulting population spatial pattern of an invasive Antarctic Poa annua L. population. Our hypothesis was that the tussocks trap wind-dispersed seeds. We set 40 artificial grass seed traps simulating tussocks and 40 soil seed traps (control) in the area occupied by the population. The traps were exposed for a total of 3 years and exchanged p

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18

Jarvis, JC, SA McKenna, and MA Rahseed. "Seagrass seed bank spatial structure and function following a large-scale decline." Marine Ecology Progress Series 665 (April 29, 2021): 75–87. http://dx.doi.org/10.3354/meps13668.

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We examined the spatial structure (distribution, density) and function (viability) of the seagrass sediment seed bank, the storage of viable propagules (e.g. seeds, tubers, diaspores) in the sediment over time,in the northern Great Barrier Reef World Heritage Area in Cairns, Queensland, following a large-scale decline in seagrass area. A spatially explicit seagrass seed bank analysis was paired with a long-term annual assessment of seagrass distribution to assess seed bank spatial patterns and their relationship with the recovery and presence of seagrass, and water depth. Four years post-decli

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19

Duan, Yu, Tengyun Ye, Daiquan Ye, and Jian Zhou. "Seed Distribution and Phenotypic Variation in Different Layers of a Cunninghamia Lanceolata Seed Orchard." Forests 14, no. 2 (2023): 240. http://dx.doi.org/10.3390/f14020240.

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The phenotypic characteristics of forest seeds are the basis of germplasm innovation, genetic improvement, and biological research, and they also are the reference for the development of seed orchards. In this study, we analyzed seed quantity characteristics, phenotypic differentiation, and variation patterns in three seed-bearing clones from different crown layers of the Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) orchard located in Fujian Province, China. We divided the clones into six layers according to crown height and the sunny and shady sides, 14 phenotypic characteristics, and f

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20

Ahmed, Bilal, Babar Khan, Muhammad U. Ghazanfar, et al. "OCCURRENCE AND DISTRIBUTION OF VEGETABLES SEED-BORNE MYCOFLORA IN PUNJAB PAKISTAN." Pakistan Journal of Phytopathology 29, no. 2 (2017): 265. http://dx.doi.org/10.33866/phytopathol.029.02.0405.

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Vegetables seeds are carrier of mycoflora inciting bulk of diseases, responsible for quality and yield losses. Majority of microbes are saprophyte and few are potential pathogen for the crop. In this research seed mycoflora were isolated by using standard blotter paper and agar plate technique. Major vegetables of summer and winter seeds were collected from regional local markets of Punjab province. Among these 15 fungal genera and 18 different species were identified. According to results highest incidence of fungal pathogens were Aspergillus niger, A. flavus, Penicillium camemberti and Bipol

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Bulavintsev, R. A., S. I. Golovin, A. L. Sevostyanov, A. V. Volzhentsev, V. A. Stebakov, and A. V. Kozlov. "Research of seeding fulfilled with the help of stud-roller feed." IOP Conference Series: Earth and Environmental Science 839, no. 5 (2021): 052052. http://dx.doi.org/10.1088/1755-1315/839/5/052052.

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Abstract This article is dedicated to increasing the quality of grain seeds distribution in a row using various parameters of the stud roller with new studs bent off to the side rotation, and also contains the results of theoretical and experimental investigations. In the frames of this investigation the optimal parameters of experimental seed wheel were defined, the factors influencing seed feed were identified, the formula of full working volume of seeds, thrown out by feeding mechanism per one rotation of roller, was generated, the following dependencies were detected: dependence of seed fe

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VERGARA, RAFAEL DE OLIVEIRA, ALEXANDRE GAZOLLA-NETO, and GIZELE INGRID GADOTTI. "SPACE DISTRIBUTION OF SOYBEAN SEED STORAGE POTENTIAL." Revista Caatinga 32, no. 2 (2019): 399–410. http://dx.doi.org/10.1590/1983-21252019v32n213rc.

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ABSTRACT The objective of this study was to identify the spatial distribution of the physiological quality of soybean seeds during storage from a production field of 39 hectares using geostatistical techniques in the 2012/2013 harvest. Seeds were sampled at geo-referenced points for the determination of physiological quality and spatial dependence analysis. The results were submitted to analysis of descriptive statistics, Pearson's linear correlation and geostatistics. The grid of one point per hectare and a georeferenced sampling mesh with spacing of 100 meters between points was efficient in

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23

Tang, Hong, Lu Wang, and Ding Huang. "On the Distribution Properties of BitTorrent Seeds." Advanced Materials Research 186 (January 2011): 510–14. http://dx.doi.org/10.4028/www.scientific.net/amr.186.510.

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The P2P applications tend to be important in nowadays Internet, and BitTorrent(BT) is one of the most popular P2P applications. This paper analyzes the distribution of BitTorrent seeds and its properties with the data measured from the Web server of BitTorrent. The Gini coefficient is introduced as the index of the distribution of the seeds in BitTorrent system to demonstrate the evolution of the seed distribution. The Largest Lyapunov exponent is also employed to analyze the stability of the emergent structure of the seeds. The results show that in a BitTorrent system the seed distribution is

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24

Agrawal, Khushi. "Regulatory Challenges in Agricultural Supply Chain – A Focus on Seed Distribution Contracts." International Scientific Journal of Engineering and Management 04, no. 06 (2025): 1–9. https://doi.org/10.55041/isjem04067.

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Abstract India’s agricultural sector, though rich in potential, faces several institutional and operational hurdles—particularly in the domain of seed distribution. This study investigates the regulatory challenges within the agricultural supply chain by focusing on seed distribution contracts, which are central to crop productivity, farmer rights, and supply chain transparency. Using both primary survey data and legal analysis, the research highlights widespread issues such as lack of farmer awareness, inconsistent enforcement of laws, biased contracts, and ineffective dispute resolution mech

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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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Lee, Philip C. "The effect of seed dispersal limitations on the spatial distribution of a gap species, seaside goldenrod (Solidago sempervirens)." Canadian Journal of Botany 71, no. 7 (1993): 978–84. http://dx.doi.org/10.1139/b93-111.

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This study examined the seed ecology of seaside goldenrod, Solidago sempervirens L., a gap species, on coastal dunes dominated by American beachgrass, Ammophila breviligulata. A test was done to determine whether lower densities of S. sempervirens on undisturbed primary dune grasslands were due to limited seed dispersal or barriers to seedling establishment. Seed rain was greater within blowouts and transition areas than in immature and mature grasslands. Blowouts and transition areas produced prominent seed shadows and served as primary seed sources. Both seed shadow measurements and inflores

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Kirillova, I. A., and D. V. Kirillov. "Reproductive Success of <i>Dactylorhiza fuchsii</i> (Druce) Soó at the Northern Border of Its Distribution Range." Известия Российской академии наук. Серия биологическая, no. 1 (January 1, 2023): 68–79. http://dx.doi.org/10.31857/s1026347023010079.

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The paper presents data on the population structure, morphometric features of plants and seeds and some aspects of reproductive biology (fruit set, seed productivity) of Dactylorhiza fuchsii (Druce) Soó (Orchidaceae) on the northern border of its distribution area (the Komi Republic, northeast Russia). We found statistically significant decrease of seed size and flowers number per inflorescence from south to north within of the species distribution area. In the Komi Republic, the seed productivity of Dactylorhiza fuchsii was found to be lower than in the southern parts of its distribution area

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Chiu, S. N., та M. P. Quine. "Central limit theorem for germination-growth models in ℝd with non-Poisson locations". Advances in Applied Probability 33, № 4 (2001): 751–55. http://dx.doi.org/10.1239/aap/1011994026.

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Seeds are randomly scattered in ℝd according to an m-dependent point process. Each seed has its own potential germination time. From each seed that succeeds in germinating, a spherical inhibited region grows to prohibit germination of any seed with later potential germination time. We show that under certain conditions on the distribution of the potential germination time, the number of germinated seeds in a large region has an asymptotic normal distribution.

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Chiu, S. N., та M. P. Quine. "Central limit theorem for germination-growth models in ℝd with non-Poisson locations". Advances in Applied Probability 33, № 04 (2001): 751–55. http://dx.doi.org/10.1017/s0001867800011162.

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Seeds are randomly scattered in ℝ d according to an m-dependent point process. Each seed has its own potential germination time. From each seed that succeeds in germinating, a spherical inhibited region grows to prohibit germination of any seed with later potential germination time. We show that under certain conditions on the distribution of the potential germination time, the number of germinated seeds in a large region has an asymptotic normal distribution.

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Moore, F. D., and E. E. Roos. "TOWARDS A NON-DESTRUCTIVE SEED TEST." HortScience 25, no. 9 (1990): 1134d—1134. http://dx.doi.org/10.21273/hortsci.25.9.1134d.

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An index “internal slope” derived from the cumulative frequency distribution of individual seed leachate conductivities is related to seed quality; the larger the index value the less variation among individual seeds in a sample (100 seeds) and the higher the seed quality. We have recently developed data acquisition/instrurment control/data smoothing/data analysis software which accesses frequency and cumulative frequency distributions of individual seed conductivities and the derived index on an almost continuous basis from the start of the first soaking.At present, lack of convergence with r

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Khattab, Nisreen Jamal, and Hussein Ali Hindi Al-Bayati. "Response of Yield Traits and its Components to Sesame Genotypes for Different Plant Distributions." IOP Conference Series: Earth and Environmental Science 1259, no. 1 (2023): 012087. http://dx.doi.org/10.1088/1755-1315/1259/1/012087.

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Abstract A field experiment was carried out at the research station of the Department of Field Crops at the College of Agriculture at the University of Tikrit in Salah al-Din Govemorate under gypsum soil conditions during the summer agricultural season (2022 AD), to evaluate the performance of six sesame genotypes, namely (Al-Mahalli, Wada’, Had, Sumer, Rafidain and Baytim) and three distributions. Plants, which are (60 x 10, 40 x 15, and 30 x 20) cm2, and Interaction between two factors of the study in traits, yield, its components, and the percentage of oil. The cultivar Wadaa gave the highe

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Savi, Daniel, Samir Paulo Jasper, Gabriel Ganancini Zimmermann, et al. "Graphite action on the longitudinal distribution of soybean seeds in mechanical and pneumatic feeders." Acta Scientiarum. Agronomy 45 (November 22, 2022): e57920. http://dx.doi.org/10.4025/actasciagron.v45i1.57920.

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The use of powdered graphite as a solid lubricant to reduce friction among soybean seeds during mechanical sowing aims to facilitate the seed flow into the seed reservoir, while reducing mechanical damage to the seed. The objective of this study was to evaluate the influence of graphite on the longitudinal deposition of soybean seeds using mechanical and pneumatic feeders at different distribution velocities. The experiment was performed on a static simulation-test bench, with a completely randomized design with two varying factors: graphite dose (0, 1, 2, 4, and 8 g kg-1 seed) and distributio

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Wallace, I. A., J. PJ Eerens, A. Rahman, and B. D. Clarkson. "Horizontal seed dispersion patterns of Californian thistle (Cirsium arvense)." New Zealand Plant Protection 58 (August 1, 2005): 148–51. http://dx.doi.org/10.30843/nzpp.2005.58.4320.

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Few Californian thistle seeds find their way to the soil seed bank raising a question about their dispersal and fate The horizontal seed distributions around ten Californian thistle patches were studied on two farms Thirteen seed traps were placed on the ground in four directions around each patch seven of these were downwind (prevailing wind direction) at different distances from the patches Seed traps were left for 48 h and trapping was repeated three times The highest numbers of seeds were collected at the edge of a patch with numbers declining exponentially as distance from the patch incre

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Chen, Kai, Kevin S. Burgess, Fangliang He, Xiang-Yun Yang, Lian-Ming Gao, and De-Zhu Li. "Seed traits and phylogeny explain plants' geographic distribution." Biogeosciences 19, no. 19 (2022): 4801–10. http://dx.doi.org/10.5194/bg-19-4801-2022.

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Abstract. Understanding the mechanisms that shape the geographic distribution of plant species is a central theme of biogeography. Although seed mass, seed dispersal mode and phylogeny have long been suspected to affect species distribution, the link between the sources of variation in these attributes and their effects on the distribution of seed plants are poorly documented. This study aims to quantify the joint effects of key seed traits and phylogeny on species distribution. We collected the seed mass and seed dispersal mode from 1426 species of seed plants representing 501 genera of 122 f

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Durand-Gasselin, Tristan, and Benoît Cochard. "Oil palm seed distribution." Oléagineux, Corps gras, Lipides 12, no. 2 (2005): 148–53. http://dx.doi.org/10.1051/ocl.2005.0148.

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Guryanova, Alina Aleksandrovna, Yuri Viktorovich Komarov, and Sergey Valerievich Timofeev. "Influence of shape of the surface generatrix of the seed spreader for uniform distribution of seeds across the width of the strip sowed by the coulter." Agrarian Scientific Journal, no. 2 (February 9, 2025): 133–38. https://doi.org/10.28983/asj.y2025i2pp133-138.

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The paper considers various forms of generating seed spreaders and their influence on the uniform distribution of seeds across the width of the sowing strip when using coulter technology for intrasoil sowing of grain crops. The study closely examines how changes in seed spreader components affect seed distribution uniformity, which is critical to optimizing crop yield.

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PLYAKA, VALERY I. "Evaluating uniformity of seed distribution with an experimental seeder: solid sowing of lawn grasses." Agricultural Engineering, no. 6 (2023): 24–30. http://dx.doi.org/10.26897/2687-1149-2023-6-24-30.

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Solid seeding should ensure uniform distribution of seeds over the cultivated area. The experimental seeder SV‑0.9, developed and improved by the authors, is equipped with a coil type seed-feeding device. It provides variable seed supply from each pair of coils of the seed-feeding device and ensures uniform seeding when following a straight path and a curved path. For solid sowing, it is necessary to provide uniform seed distribution over the cultivated area. For this purpose, two indicators can be used: the seeding uniformity factor and the average feeding area of a plant. The Gazon Bystriy l

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Yanful, Mary, and M. A. Maun. "Spatial distribution and seed mass variation of Strophostyles helvola along Lake Erie." Canadian Journal of Botany 74, no. 8 (1996): 1313–21. http://dx.doi.org/10.1139/b96-159.

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Field studies were conducted to determine the survival, seed-mass variability, and reproductive strategies of wild bean, Strophostyles helvola (L.) Ell., plants on the foredunes at Port Burwell Provincial Park along Lake Erie. In spring, a large number of seedlings were found on the drift-line (area of beach where detritis deposits are cast on shore by the waves) and a small number both on the lakeward (mid-beach) and landward (high-beach) ends of the drift-line. Plants growing on the mid-beach were larger and produced a significantly greater number of heavier seeds than those on the drift-lin

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Артамонов, Evgenij Artamonov, Котов, Dmitriy Kotov, Артамонова, and Olga Artamonova. "THEORETICAL SUBSTANTIATION OF CONSTRUCTIVE AND REGIME PARAMETERS OF MECHANICAL CELLULAR-DISK SOWING DEVICE FOR SOWING AMARANTH PANICULATE." Bulletin Samara State Agricultural Academy 1, no. 4 (2016): 60–66. http://dx.doi.org/10.12737/21793.

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The purpose of the study is improving the uniformity of sowing seeds of amaranth paniculate cellular-disk sowing device. One of the conditions allowing to achieve high planned yield of amaranth is its accurate seeding with specified messagenum interval. Uniform distribution of seeds and plants is necessary due to the high requirements to the area of nutrition. Analysis of the existing agropolicy and designs of modern metering devices for fine-seed crops shows that they do not allow to implement fully agroclavine accuracy of seed distribution in the row when planting amaranth with a variation m

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Rahman, A., T. K. James, N. Grbavac, J. E. Waller, and J. Mellsop. "Spatial variability of fathen seeds in the soil under repeat maize cropping." Proceedings of the New Zealand Plant Protection Conference 52 (August 1, 1999): 209–13. http://dx.doi.org/10.30843/nzpp.1999.52.11567.

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Variability in distribution of fathen seeds in the soil was investigated to develop sampling protocols. Vertical distribution of seeds was assessed at 0-2.5, 2.5-5.0, 5.0-10.0 and 10.0-15.0 cm depth. Horizontal distribution of seeds in the top 5cm of soil was assessed in a 20 by 2.5 m grid at 50 cm intervals. Seeds were extracted from the samples by sieving and their viability was assessed. The fathen seed numbers halved with each 5 cm increase in depth. Seed numbers declined along the row in some cases but there was little localised clumping (? 1 m) of the seed. The most efficient method of s

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Gierz, Łukasz, and Piotr Markowski. "The Effect of the Distribution Head Tilt and Diffuser Variants on the Evenness of Sowing Rye and Oat Seeds with a Pneumatic Seed Drill." Materials 13, no. 13 (2020): 3000. http://dx.doi.org/10.3390/ma13133000.

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Due to the sustainable development of agriculture machines with large working widths of 4–6 m or even 9–12 m are increasingly often used for agrotechnical operations. The sowing machinery whose working widths are much bigger than the width of the seed box is equipped with a pneumatic system for transporting seeds from the seed box to coulters. One of the structural elements that affect the sowing accuracy in such seed drills is the distribution head with a diffuser. This article is about research on the influence of the distribution head deviation from the vertical position and constructional

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42

O'Farrill, Georgina, Colin A. Chapman, and Andrew Gonzalez. "Origin and deposition sites influence seed germination and seedling survival of Manilkara zapota: implications for long-distance, animal-mediated seed dispersal." Seed Science Research 21, no. 4 (2011): 305–13. http://dx.doi.org/10.1017/s0960258511000201.

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AbstractThe distribution and dynamics of plant populations depend on the recruitment of young individuals, which is influenced by seed production, animal seed dispersal, dispersal distance, and the deposition of seeds in favourable places for seed germination/establishment and seedling survival. In particular, seeds dispersed over long distances will likely encounter new environmental conditions that occur at large spatial scales, with seed and seedling survival influenced by the adaptation of plant populations to soil and climate conditions. In this paper, it is hypothesized that seed germina

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Takagi, Etsuro, and Katsumi Togashi. "Distribution patterns of Macrodasyceras hirsutum (Hymenoptera: Torymidae) eggs among Ilex integra (Aquifoliaceae) seeds and berries." Canadian Entomologist 145, no. 6 (2013): 639–46. http://dx.doi.org/10.4039/tce.2013.47.

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AbstractPreference-performance hypothesis in host selection by herbivorous insects predicts selective oviposition on plant on which the offspring maximise fitness. The seed parasitoid wasp, Macrodasyceras hirsutum Kamijo (Hymenoptera: Torymidae) selectively lays the eggs into the fertilised seeds of Ilex integra Thunberg (Aquifoliaceae). Only one larva develops in a seed. Therefore, the hypothesis predicts a uniform distribution pattern of wasp eggs among fertilised seeds. Dissection of 531 berries showed that M. hirsutum deposited one to five eggs into a fertilised seed. Iwao's patchiness reg

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Noroozi, Shahrzad, Hasan Mohammad Alizadeh, and Hamid Rahimian Mashhadi. "Factors Affecting Postdispersal Weed Seed Predation in Barely Fields." ISRN Agronomy 2012 (July 30, 2012): 1–6. http://dx.doi.org/10.5402/2012/461245.

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Seed predation can be exploited as a mean of natural weed control. Field experiments were conducted in 2007 in four barely fields in Mashhad, NE of Iran to determine the effects of seed covering tissues, seed distribution patterns and interactions between seed density and background seed density on postdispersal seed predation. Five weed species (Avena ludoviciana, Hordeum spontaneum, Sinapis arvensis, Rumex obtusifolius and Rapistrum rugosum), three seed densities (50, 100 and 150 seed dish-1), two background seed densities (with and without), three distribution patterns (random, even, and ag

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Wang, Jing, Qiaoling Yan, Ting Zhang, et al. "Converting Larch Plantations to Larch-Walnut Mixed Stands: Effects of Spatial Distribution Pattern of Larch Plantations on the Rodent-Mediated Seed Dispersal of Juglans mandshurica." Forests 9, no. 11 (2018): 716. http://dx.doi.org/10.3390/f9110716.

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Larch (Larix spp.) is planted after a clear-cut of secondary forests (SFs) to meet the timber demand of Northeast China. However, the declination of soil fertility and the acidification of surface runoff in larch plantations (LPs) resulting from mono-species composition have threatened the sustainable development of LPs. Converting pure LPs into larch-walnut mixed forests can solve those problems, in which it is crucial to promote the seed regeneration of Juglans mandshurica in LPs. The success of walnut seed regeneration is dependent on rodent removing seed away from mother trees and the disp

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MONTVILLE, REBECCA, and DONALD W. SCHAFFNER. "Analysis of Published Sprout Seed Sanitization Studies Shows Treatments Are Highly Variable." Journal of Food Protection 67, no. 4 (2004): 758–65. http://dx.doi.org/10.4315/0362-028x-67.4.758.

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Consumption of raw sprouts has caused many foodborne illness outbreaks in the last decade, and most outbreaks have been linked to contaminated seeds. Many seed sanitization treatments have been studied as a means to reduce the risk of illness associated with sprouts. Published data on seed sanitization were analyzed collectively to identify factors that influenced the efficacy of seed sanitization and to determine the variability associated with various sanitization processes. Temperature and duration of the sanitization treatment were found to produce a negligible effect on log microbial redu

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V. G., Sakhnevych. "Investigation of seed distribution on the surface of the depositing electrode from the grain material supply in the process of seed disinfection in electric fields." MECHANICS and AUTOMATICS of AGROINDUSTRIAL PRODUCTION, no. 1(116) (2023): 182–91. http://dx.doi.org/10.37204/2786-7775-2023-1-20.

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Purpose. Determination of technical and technological parameters of the electrotechnological means for presowing disinfection and stimulation of seeds in the electric field depending from the coefficient of distribution of seeds of crops on the surface of the precipitating rotating electrode. Methods. Analytical and calculation method using the structural and technological parameters of the working area of the means for pre-sowing disinfection and stimulation of seeds in an electric field and the data on the physical and mechanical properties of crop seeds. Results. A prototype of an electrote

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Tóth, Ágnes, Balázs Deák, Katalin Tóth, et al. "Vertical distribution of soil seed bank and the ecological importance of deeply buried seeds in alkaline grasslands." PeerJ 10 (April 5, 2022): e13226. http://dx.doi.org/10.7717/peerj.13226.

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Background Soil seed banks play a central role in vegetation dynamics and may be an important source of ecological restoration. However, the vast majority of seed bank studies examined only the uppermost soil layers (0–10 cm); hence, our knowledge on the depth distribution of seed bank and the ecological significance of deeply buried seeds is limited. The aim of our study was to examine the fine-scale vertical distribution of soil seed bank to a depth of 80 cm, which is one of the largest studied depth gradients so far. Our model systems were alkaline grasslands in East-Hungary, characterised

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Li, Min, Xiaowei He, Xufeng Wang, et al. "Design and Experiment of Seeding Device for Morchella Planter in Southern Xinjiang Desert." Agriculture 15, no. 11 (2025): 1140. https://doi.org/10.3390/agriculture15111140.

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In seeding operations, fermented seeds with weak surface energy tend to experience problems such as adhesion, seed leakage, and clogging on the seeder’s end. To improve seed distribution uniformity, a three-stage spiral seeding device with “seed filling, transport, and dispersing” functions was designed. Kinematic and dynamic models of fermented seeds under spiral conveying conditions were developed to analyze the motion and force characteristics of the seeds under various working states. A discrete element method (DEM) and multi-body dynamics (MBD) coupled simulation model was established, al

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Wood, PM, DS Petterson, GR Hancock, and GA Brown. "Distribution of seed infected with Phomopsis leptostromiformis and of phomopsin A within a lupin crop." Australian Journal of Experimental Agriculture 27, no. 1 (1987): 77. http://dx.doi.org/10.1071/ea9870077.

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A detailed study was made of the Phomopsis leptostromiformis infection and phomopsin A content of seed within a lupin crop having a high level of visible pod infection. Over 96% of the visibly infected seeds contained viable P. leptostromlformis. Visually clean, or whole white seed, from the primary pods had a higher level of fungal infection (56%) than comparable seed from the other pods (11%). The discoloured seed content of the primary pods was higher than for the other pods in each instance. The phomopsin A content of the seed was higher than previously reported. Although the cracked and d

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