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Rozprawy doktorskie na temat „Weed biomass”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Sprawdź 17 najlepszych rozpraw doktorskich naukowych na temat „Weed biomass”.

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1

Pittman, Kara Brooke. "High Residue Cover Crops for Annual Weed Suppression in Corn and Soybean Production and Potential for Hairy Vetch (Vicia villosa) to be Weedy." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/82041.

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After termination, cover crop residue can suppress weeds by reducing sunlight, decreasing soil temperature, and providing a physical barrier. Experiments were implemented to monitor horseweed suppression from different cover crops as well as two fall-applied residual herbicide treatments. Results suggest that cover crops, other than forage radish in monoculture, can suppress horseweed more consistently than flumioxazin + paraquat or metribuzin + chlorimuron-ethyl. Cover crop biomass is positively correlated to weed suppression. Subsequent experiments were designed to determine the amount of we

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Pittman, Kara. "High Residue Cover Crops for Annual Weed Suppression in Corn and Soybean Production and Potential for Hairy Vetch (Vicia villosa) to be Weedy." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/82041.

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After termination, cover crop residue can suppress weeds by reducing sunlight, decreasing soil temperature, and providing a physical barrier. Experiments were implemented to monitor horseweed suppression from different cover crops as well as two fall-applied residual herbicide treatments. Results suggest that cover crops, other than forage radish in monoculture, can suppress horseweed more consistently than flumioxazin + paraquat or metribuzin + chlorimuron-ethyl. Cover crop biomass is positively correlated to weed suppression. Subsequent experiments were designed to determine the amount of we

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3

Tolson, Joshua Allen. "THE EFFECT OF INTEGRATED WEED MANAGEMENT STRATEGIES ON WEED POPULATIONS AND BIOMASS, PASTURE PRODUCTIVITY, ECONOMIC RETURNS, AND FORAGE QUALITY WITH AND WITHOUT GRAZING." UKnowledge, 2012. http://uknowledge.uky.edu/pss_etds/4.

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Field studies examined the strategies of mowing, herbicide, fertility, and all combinations on tall ironweed populations, weed biomass, pasture yield, grazing, economics, and forage quality at three Kentucky locations. Mowing was performed in July 2008 and 2009, herbicide applied in August 2008, and fertilizer applied in September 2008 and 2009 at all locations. Weed populations were measured in 2008, 2009, and 2010, and forage and weed biomass collected in May or June of 2009 and 2010. Herbicide treatments reduced weed biomass at all locations, and reduced tall ironweed stems by 64% or greate

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4

Bedet, Charlotte. "Soil fertility, crop nutrients, weed biomass and insect populations in organic and conventional field corn (Zea mays L.) agroecosystems /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488196781734832.

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5

Gavazzi, Michael Joseph. "The Influence of Elevated Carbon Dioxide and Water Availability on Herbaceous Weed Development and Planted Loblolly Pine (Pinus taeda) and Coppice Sweetgum (Liquidambar styraciflua) Growth." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36813.

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Loblolly pine (Pinus taeda) and coppiced sweetgum (Liquidambar styraciflua) seedlings were grown in competition with a native weed community using soil and seed bank collected near Appomattox, Virginia. Seedlings and weeds were exposed to CO2 (ambient and elevated) and water (water stressed and well watered) treatments for approximately one growing season in closed top chambers. <p> Weed growth had an effect on tree growth, but the amount of variation in tree biomass explained by weed biomass was very low. It appears that the tree seedlings benefited more f

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6

Mashingaidze, Nester. "Weed dynamics in low-input dryland smallholder conservation agriculture systems in semi-arid Zimbabwe." Thesis, University of Pretoria, 2013. http://hdl.handle.net/2263/24412.

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The reported requirement for a higher weeding effort due to increased weed infestations under conservation agriculture (CA) relative to conventional mouldboard plough tillage is perceived by both smallholder farmers and extension workers as the main limiting factor to the widespread adoption of CA by smallholder farmers in southern Africa. However, proponents of CA argue that weeds are only a problem under CA in the initial two years and decline afterwards resulting in reduced labour requirements for weeding under CA. They further posit that weeds are only major problem where minimum tillage (

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7

Musunda, Bothwell Zvidzai. "Evaluation of cover crop species for biomass production, weed suppression and maize yields under irrigation in the Eastern Cape Province, South Africa." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/347.

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Achieving high biomass yields of cover crops has been a challenge to the success of Conservation Agriculture (CA) practices in the Eastern Cape (EC). A study was conducted to evaluate strategies for optimizing cover crop biomass production. Trials were carried out to screen summer and winter cover crops, as well as evaluate intercropping patterns and planting dates for biomass, weed suppression and subsequent maize yield under irrigation. Four summer legume cover crop species were evaluated under a Randomised Complete Block Design (RCBD) design. The cover crops were fertilized with 13.34 kg ha

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8

Setter, Cassandra Marie. "Weed Control Effects on Native Species, Soil Seedbank Change, and Biofuel Production." Thesis, North Dakota State University, 2011. https://hdl.handle.net/10365/29318.

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Aphthona spp. flea beetles were released in the Little Missouri National Grasslands (LMNG) in western North Dakota in 1999 to control leafy spurge (Euphorbia esula L.). The changes in soil seed bank composition and leafy spurge density were evaluated on two ecological sites five (2004) and ten years (2009) after Aphthona spp. release to monitor the effectiveness of the insects on weed control and associated change in plant communities. In 2009, leafy spurge stem density averaged 2 and 9 stems m-2 in the loamy overflow and loamy sites, respectively, compared to 110 and 78 stems m-2, respe

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9

Gonçalves, Gerlândio Suassuna. "Período crítico de interferência de plantas infestantes e seus efeitos sobre as características fisiológicas e nutricionais em laranjeira ‘pera’, no Amazonas." Universidade Federal do Amazonas, 2015. http://tede.ufam.edu.br/handle/tede/4038.

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Submitted by Kamila Costa (kamilavasconceloscosta@gmail.com) on 2015-06-09T20:39:30Z No. of bitstreams: 1 Tese-Gerlandio Suassuna Gonçalves.pdf: 1253081 bytes, checksum: bb8f078c3065d7b328b0bbf489d24eba (MD5)<br>Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-06-10T15:31:37Z (GMT) No. of bitstreams: 1 Tese-Gerlandio Suassuna Gonçalves.pdf: 1253081 bytes, checksum: bb8f078c3065d7b328b0bbf489d24eba (MD5)<br>Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-06-10T15:33:53Z (GMT) N

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10

Davis, Philip Browning. "The invasion potential and competitive ability of Camelina sativa (L.) Crantz (camelina) in rangeland ecosystems." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/davis/DavisP0510.pdf.

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Camelina sativa (L.) Crantz (large-seeded false-flax) is a recently introduced oilseed crop in Montana and has potential for large scale production for the biofuel market. However, due to weedy characteristics, the invasive potential of this species is of concern. A need exists to create a pre-entry protocol to accurately assess risk to minimize uncertainty inherent in qualitative weed risk assessment approaches. We assessed the probability of C. sativa to invade rangeland ecosystems of southwest Montana to address this concern. The objectives of this study were to 1) quantitatively assess the

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11

Muzangwa, Lindah. "Cover crop biomass production and effects on weeds and soil fertility in a maize-based conservation agriculture system." Thesis, University of Fort Hare, 2011. http://hdl.handle.net/10353/484.

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Low cover crop biomass production is a major obstacle to the success of conservation agriculture currently promoted as panacea to the inherent problem of soil erosion and loss of soil productivity in the Eastern Cape (EC). Therefore, this study evaluated cover crop management strategies for optimizing biomass production for better soil cover, soil nitrogen (N) and phosphorus (P) fertility, weed control and maize yields. The strategies tested are cover crop bicultures, selection of an adapted lupin cultivar and seeding rate, and the feasibility of rain fed winter cover cropping. The cover crop

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12

Attarian, Amir. "Weed management for giant reed (Arindo donax) biomass production in Oregon." Thesis, 2013. http://hdl.handle.net/1957/38098.

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Giant reed (Arundo donax L.) is a candidate to provide feedstock for the Portland General Electric power plant in Boardman, Oregon. Giant reed is a fast perennial grass, producing 23-27 metric tons ha⁻¹ of biomass and has the ability to adapt to diverse environments making it a good candidate for biomass production. This study tested postemergence and preemergence herbicides for controlling weeds in giant reed during the establishment year in which giant reed plants are more sensitive to weed competition. The greenhouse study demonstrated that among the tested herbicides, bromoxynil plus MCPA

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13

Conley, Shawn P. "Effect of cultivar, row spacing, and weed management on weed biomass, potato ("Solanum tuberosum" L.) yield, net crop value, and crop canopy development." 1999. http://catalog.hathitrust.org/api/volumes/oclc/42195379.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1999.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 49-54).

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14

Wijesuriya, Wipulal Sardha. "Investigation of the relationships between biomass reduction, soil disturbance, soil nutrients and weed invasion in basalt plains native grassland remnants in Victoria, Australia." Thesis, 1999. https://vuir.vu.edu.au/15240/.

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The investigations reported in this thesis examined the relationships between biomass reduction (burning and mowing), soil disturbance, soil nutrient levels (N, P and K) and weed invasion in native grassland remnants in Victoria, Australia. The study was carried out at three native grassland remnant sites, Derrimut grassland reserve, Laverton grassland reserve and Victoria University of Technology, St. Albans campus grassland reserve on the westem edge of Melboume, Australia. These grassland remnants belong to the Western Basalt Plains grassland community which is listed as threatened in Vic

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15

Cogdill, Todd Joseph. "Impact of Herbicides on Winter Canola (Brassica napus L.) Production and Fatty Acid Composition in South Texas." Thesis, 2013. http://hdl.handle.net/1969.1/149274.

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Canola is a cool-season, oilseed crop grown throughout Europe, Canada, and the Northern Great Plains region of the United States. The expansion of canola production into new growing regions, such as the Southern Plains region, has resulted in new production challenges. The Southern Plains region cultivates canola as a winter annual compared to a spring annual for the Northern Great Plains and Canada. Given the difference in climate and weed spectrum, region-specific weed management systems need to be developed. Agronomic practices can affect seed oil content, protein content, and fatty aci

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16

Adak, Anurup. "Exploration of the parthenium hysterophorus biomass for production of laccase and bioethanol." Thesis, 2017. http://localhost:8080/xmlui/handle/12345678/7342.

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17

Kumalasari, Nur. "Diversity of rice weeds vegetation and its potential as local forage resource in Java, Indonesia." Thesis, 2014. http://hdl.handle.net/11858/00-1735-0000-0022-5EEF-8.

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