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Dissertations / Theses on the topic 'Cover crop'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 June 2025

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1

Munda, Bruce, Tim C. Knowles, Art Meen, Vic Wakimoto, and Bill Worthy. "Winter Forage Cover Crop Trials." College of Agriculture, University of Arizona (Tucson, AZ), 1998. http://hdl.handle.net/10150/208283.

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Several crops were evaluated at Worthy farms, near Marana, AZ, Wakimoto farms, Mohave Valley, near Bullhead City, AZ, and the Tucson Plant Materials Center for use as a winter cover crop following cotton with potential to reduce wind erosion and produce one to two hay cuttings. Hairy vetch (Vicia villosa), 'Lana' woolypod vetch (Vicia villosa ssp. varia), 'Papago' pea (Pisum sativum), and 'Biomaster' pea (Pisum sativum) were sown at the Tucson Plant Materials Center. Species sown at Worthy farm were: Papago pea, Lana vetch, and Biomaster pea. Species sown at Wakimoto farm were: Biomaster pea,
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2

Ess, Daniel R. "Cover crop residue effects on machine-induced soil compaction." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-164819/.

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3

Arnet, Kevin Broc. "Cover crops in no-tillage crop rotations in eastern and western Kansas." Thesis, Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/4086.

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4

Christenson, Andi Marie. "Cover crops for horseweed [Conyza canadensis (L.)] control before and during a soybean crop." Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/19230.

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Master of Science<br>Department of Agronomy<br>J. Anita Dille<br>Kraig Roozeboom<br>Increasing numbers of herbicide-resistant weed species require alternative methods of weed suppression to be examined. This study quantified the interaction between various cover crop or herbicide systems and horseweed [Conyza canadensis (L.)] growth. Fall cover crops of winter wheat [Triticum aestivum (L.)], winter rye [Secale cereal (L.)], barley [Hordeum vulgare (L.)] and annual ryegrass [Lolium multiflorum (L.)] were seeded in November 2012 and 2013. Spring cover crop of oat [Avena sativa (L.)] was seeded i
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5

Davis, Cathryn Joyce. "Cover crops for soil health and forage." Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/34537.

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Master of Science<br>Department of Agronomy<br>DeAnn R. Presley<br>Cover crops have numerous benefits and while cover crops have been used for centuries, currently there are few producers in Kansas growing them and so there is a need for additional research on how cover crops affect soil properties, and on the potential for utilizing cover crops as forage. Two studies are presented in this thesis. The first study evaluated the use of cover crops in a vegetable production system as compared to a fully tilled control. This study evaluated soil physical properties in the form of wet aggregate st
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6

Kern, James D. "Water Quality Impacts of Cover Crop/Manure Management Systems." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/40385.

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Crop production, soil system, water quality, and economic impacts of four corn silage production systems were compared through a field study including 16 plots (4 replications of each treatment). Systems included a rye cover crop and application of liquid dairy manure in the spring and fall. The four management systems were: 1) traditional, 2) double-crop, 3) roll-down, and 4) undercut. In the fourth system, manure was applied below the soil surface during the undercutting process. In all other systems, manure was surface-applied. In the third system, the rye crop was flattened with
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7

Abel, David Scott. "Cover crop effects on soil moisture and water quality." Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/34650.

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Master of Science<br>Department of Agronomy<br>Nathan O. Nelson<br>Eutrophication of freshwater lakes and streams is linked to phosphorus (P) fertilizer loss from agriculture. Cover crops could help mitigate P loss but producers are concerned that they may use too much water. This study was conducted to better understand the effects cover crops have on soil moisture and P loss. Volumetric water content (θ) was measured at the Kansas Cover Crop Water Use research area at 10 depths throughout a 2.74 m soil profile in 5 cover crop treatments and compared to θ measured from a chemical fallow contr
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8

Collins, Amanda Shea. "Leguminous cover crop fallows for the suppression of weeds." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0007018.

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9

Wang, Guangyao (Sam), and Kurt Noite. "Summer Cover Crop Use in Arizona Vegetable Production Systems." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2010. http://hdl.handle.net/10150/147024.

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4 pp.<br>Summer cover crops can add nitrogen to the soil, build up and maintain soil organic matter, suppress pest populations, mitigate soil erosion, and reduce nutrient leaching when they are used in Arizona vegetable systems. However, careful management is required since cover crops can modify the availability of soil nitrogen and other critical nutrients. The ratio between carbon to nitrogen (C:N) in decomposing cover crop biomass is a critical indicator of the overall process of breakdown and eventual release of nutrients. This article introduces five cover crops that could improve vege
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10

GABBRIELLI, MARA. "MEASURING AND MODELLING COVER CROP GROWTH AND AGRONOMIC EFFECTS." Doctoral thesis, Università degli Studi di Milano, 2022. https://hdl.handle.net/2434/949531.

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Cover crops are cultivated during the bare soil period between the harvest of a cash crop and the sowing of the next one. Their cultivation puts into effect the permanent soil organic cover principle of conservation agriculture and exerts several agro-ecological services, among which the most relevant are nitrate leaching reduction, weed growth control, soil organic matter increase, soil structure and water infiltration improvement. In temperate climates when crop rotations include summer cash crops (such as maize or soybean), autumn-winter cover crops are sown between late July and October an
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11

Subedi-Chalise, Kopila. "Impacts of Crop Residue and Cover Crops on Soil Hydrological Properties, Soil Water Storage and Water Use Efficiency of Soybean Crop." Thesis, South Dakota State University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10265200.

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<p> Cover crops and crop residue play a multifunctional role in improving soil hydrological properties, soil water storage and water use efficiency (WUE). This study was conducted to better understand the role of crop residue and cover crop on soil properties and soil water dynamics. The study was conducted at the USDA-ARS North Central Agricultural Research Laboratory, located in Brookings, South Dakota. Two residue removal treatments that include low residue removal (LRR) and high residue removal (HRR) were established in 2000 with randomized complete block design under no-till corn (Zea may
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12

Hänninen, K. (Kaarina). "Tree - cover crop interactions: birch growth, competition and soil properties." Doctoral thesis, University of Oulu, 2002. http://urn.fi/urn:isbn:9514267184.

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Abstract The main objective of this thesis was to investigate tree - cover crop interactions and soil response in an intercropping system, in which leguminous and grass cover crops were used with birch (red-leaved Downy birch Betula pubescens L.). The investigation was conducted in two field experiments in a nursery and in a greenhouse experiment. In the latter the effect of the water supply in interspesific competition was also investigated. The cover crops in the field experiments were perennial clovers Trifolium pratense L., T. repens L. and T. hybridum L. and annual clovers T. incarnatum L
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13

Vollmer, Emily R. "Cover Crop Mulches for No-till Organically Managed Onion Production." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-11062008-105026/.

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Combining the environmentally sound practices of reduced tillage and cover crop use with organic vegetable production systems requires management choices that are tailored to specific climate and crop combinations. In the southeastern U.S. summer cover crops can be grown through the fall until desiccation by frost. At this time a cash crop such as bulb onions (Allium cepa L.) can be grown using reduced tillage for over winter production. Field experiments were conducted on first year transitional (non-organic) land in 2006-07 and 2007-08. Cover crops of foxtail millet âGerman Strain Râ [Setari
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14

Hänninen, Kaarina. "Tree-cover crop interactions : birch growth, competition and soil properties /." Oulu : Oulun Yliopisto, 2002. http://herkules.oulu.fi/isbn9514267184.

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15

Sciarresi, Cintia Soledad. "OPTIMIZING COVER CROP ROTATIONS FOR WATER, NITROGEN AND WEED MANAGEMENT." UKnowledge, 2019. https://uknowledge.uky.edu/pss_etds/122.

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Winter cover crops grown in rotation with grain crops can be an efficient integrated pest management tool (IPM). However, cover crop biomass production and thus successful provisioning of ecosystem services depend on a timely planting and cover crop establishment after harvest of a cash crop in the fall. One potential management adaptation is the use of short-season soybeans to advance cover crop planting date in the fall. Cover crops planted earlier in the fall may provide a greater percentage of ground cover early in the season because of higher biomass accumulation that may improve weed sup
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16

Malnou, Cathy. "A canopy approach to nitrogen recommendation for the sugar beet crop." Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288992.

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17

Peterson, Alan Tollof. "Intersowing Cover Crops Into Standing Soybean in the Upper Midwest." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31688.

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In order to reduce nutrient losses and soil erosion in the United States Upper Midwest following soybean [Glycine max (L.) Merr.], cover crops can be intersown into standing soybean. The objective of this study was to determine the establishment of intersown cover crops and their impacts on a soybean-wheat (Triticum aestivum L.) rotation. Four cover crops, winter camelina [Camelina sativa (L.) Crantz], winter pea [Pisum sativum ssp. arvense (L.) Poir], winter rye (Secale cereale L.), and radish (Raphanus sativus L.), were directly sown into the ground at the R4 and R6 stages of soybean at two
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18

Grindlay, Douglas J. C. "Principles governing the ability of cover crop species to trap nitrate." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294723.

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19

Wittenberg, Alex Shawn Robert. "Optimizing Winter Camelina Production as a Cover Crop In North Dakota." Thesis, North Dakota State University, 2020. https://hdl.handle.net/10365/31735.

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Winter camelina [Camelina sativa (L.) Crantz] has gained particular interested from producers and researchers in the northern Great Plains and local production information is critical. Without a correct sowing date plant stand establishment can be challenging. Morphological differences between winter- and summer-biotypes of camelina can allow producers and researchers to distinguish the two biotypes. Visible and non-visible seed differences can offer effective means to distinguish the two biotypes. Seed quality of camelina is crucial. Sowing in September until the first week of October had sim
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20

Sievers, Taylor Jo. "Cover Crop Characteristics and Impacts on Agronomic Systems in Southern Illinois." OpenSIUC, 2016. https://opensiuc.lib.siu.edu/theses/2001.

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AN ABSTRACT OF THE THESIS OF Taylor J. Sievers, for the Master of Science degree in Plant, Soil, and Agricultural Systems, presented on May 13, 2016, at Southern Illinois University Carbondale. TITLE: COVER CROP CHARACTERISITICS AND IMPACTS ON AGRONOMIC SYSTEMS IN SOUTHERN ILLINOIS MAJOR PROFESSOR: Dr. Rachel L. Cook Midwestern farmers face the dual challenge of increasing crop production while reducing environmental impacts. Best management practices to decrease nutrient and soil loss in agronomic systems has fueled the resurgence of the cover cropping practice, but many growers are unce
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21

Andersen, Bryce James. "Integrating Faba Bean (Vicia faba Roth) into Cropping Systems as a Cover Crop, Intercrop, and Late-Season Forage Compared with Other Legume Cover Crops in the Upper Midwest." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31542.

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Faba bean (Vicia faba Roth) is grown worldwide as a protein source for food, used for animal feed, and is a common cover crop in Europe, but is underutilized in Midwest farming systems. Faba bean, field pea (Pisum sativum L.), and forage pea were evaluated for biomass and chemical composition when sown after wheat. Faba bean, forage pea, balansa clover (Trifolium michelanium Savi), red clover (T. pratense L.), and rye (Secale cereale L.) were evaluated similarly when intersown into maize. Cover crops after wheat had no significant biomass differences, averaging 1210 kg ha-1, enough to support
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22

Sigdel, Sailesh. "Seeding Time and Interseeded Cover Crop Species Influence Sugarbeet Yield and Quality." Thesis, North Dakota State University, 2020. https://hdl.handle.net/10365/31884.

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Field experiments were conducted to evaluate cover crop interseeding time and species effect on sugarbeet production during 2018 and 2019 growing seasons. Cover crops were first interseeded in June and second interseeding was done in late June or early July. Four cover crops species, Austrian pea (Pisum sativum L.), winter rye (Secale cereale L.), winter camelina [Camelina sativa (L.) Crantz], and brown mustard (Brassica juncea L.), were examined. First interseeding resulted in significantly higher cover crop biomass than second interseeding. In 2018, the highest recoverable sugar yield was ob
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23

Stout, Breanna. "Short term effects of annual ryegrass, red clover and hairy vetch cover crops on various indicators of soil health." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/18716.

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Master of Science<br>Department of Biological and Agricultural Engineering<br>Philip L. Barnes<br>The world’s population has passed 7 billion and is expected grow to more alarming numbers by the year 2050. The increase in human life on the planet ushers the need to responsibly and sustainably grow more food. In order to meet the demand necessary, it is crucial that soil remains healthy and crop yields continue to increase in efficiency. Irresponsible or ill-informed practices can lead to depleted resources and degradation of fertile soils that may limit a producers’ ability to sustainably grow
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24

Avila-Segura, Laura M. "Potential benefits of cover crop based systems for sustainable production of vegetables." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0015763.

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25

Gardner, Megan Bates. "Cover Crop Root Contributions to Soil Quality in an Organiz Maine Agroecosystem." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/GardnerMB2005.pdf.

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26

Koivisto, Jason M. "Semi-leafless peas : a cover crop for establishing lucerne or red clover." Thesis, Coventry University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246331.

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27

Omwega, Asenath Kwamboka. "Crop cover, rainfall energy and soil erosion in Githunguri (Kiambu district), Kenya." Thesis, University of Manchester, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.257360.

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28

McClung, Tamara Nicole. "Sweet Corn Germination, Growth, and Yield After a Rye Winter Cover Crop." Thesis, The University of Arizona, 2013. http://hdl.handle.net/10150/311795.

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29

Odhiambo, Jude Julius Owuor. "Effect of cereal/grass and legume cover crop monocultures and mixtures on the performance of fall-planted cover crops, soil mineral nitrogen and short-term nitrogen availability." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ34601.pdf.

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30

Samson, Roger A. (Roger Anthony). "On-farm evaluation of cultivation, cover crops and chemical banding for crop and weed management in integrated farming systems." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55700.

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31

Bilek, Meredith K. "Winter annual rye cover crops in no-till grain crop rotations impacts on soil physical properties and organic matter /." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7268.

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Thesis (M.S.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Dept. of Natural Resource Sciences and Landscape Architecture. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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32

Johnson, Jennifer. "Residual Nutrient Removal by a Winter Cover Crop From Broiler Litter Amended Soils." TopSCHOLAR®, 2007. http://digitalcommons.wku.edu/theses/424.

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Poultry production throughout Southern Kentucky is becoming a major agricultural enterprise. Rapid spread of the industry has led to many agricultural advances as well as concerns. One primary concerns is the possible nutrient build-up in pasture and cropland as a result of broiler litter application. Studies were conducted at Western Kentucky University using sorghum sudangrass (Sorghum bicolor (L.) Moench) as a forage to possibly remove excess nutrients. This project led to a consideration of using a cover crop to further remove nutrients from broiler litter amended soils. This study's objec
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33

Looker, Wayde. "Effect of Relative Maturity on Soybean Yield and Cover Crop Biomass Evaluation Methods." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1554894697089079.

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34

Seman-Varner, Rachel Nicole. "The role of cover crops in agroecosystem functioning." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/83232.

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Current interest in cover cropping is focused on enhancing ecosystem services beyond soil conservation. Cover crop (CC) species function uniquely in their effects on ecosystem services when grown in monoculture or mixtures. This research integrated field experiments and a literature synthesis to evaluate the role of cover crops in improving nitrogen (N) management and simultaneously providing multiple ecosystem services. Legume CC fertilized with poultry litter (PL) could replace 101 to 117 kg N ha-1 of fertilizer in corn (Zea mays L.) production. Rye (Secale cereale L.) CC fertilized with PL
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35

Boglaienko, Daria. "Buckwheat as a Cover Crop in Florida: Mycorrhizal Status, Soil Analysis, and Economic Assessment." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/921.

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This thesis analyses buckwheat as a cover crop in Florida. The study was designed to demonstrate: soil enrichment with nutrients, mycorrhizal arbuscular fungi interactions, growth in different soil types, temperature limitations in Florida, and economic benefits for farmers. Buckwheat was planted at the FIU organic garden (Miami, FL) in early November and harvested in middle December. After incorporation of buckwheat residues, soil analyses indicated the ability of buckwheat to enrich soil with major nutrients, in particular, phosphorus. Symbiosis with arbuscular mycorrhizal fungi increased in
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36

Finney, Denise McKinney. "Evaluation of sorghum sudangrass as a summer cover crop and marketable hay crop for organic, no-till production of fall cabbage." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-03282005-141749/.

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The development of organic and conservation tillage-based vegetable production systems will offer growers in the southeastern United States new economic opportunities and promote resource conservation. The purpose of this research project was to assess the impact of incorporating a summer crop that serves as both cover crop and marketable hay crop in an organic fall vegetable production system. Sorghum sudangrass [Sorghum bicolor (L.) Moench X S. sudanense (Piper) Staph] is commonly cultivated as a forage crop in the Southeast and has the potential to produce abundant biomass, suppress weeds,
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37

Kelley, Tracy. "Efficacy, Phytotoxicity, and Cover Crop Response of Herbicide Combinations in Dark Fire Cured Tobacco." TopSCHOLAR®, 2000. http://digitalcommons.wku.edu/theses/724.

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Field studies were established during the summer of 1999 at the Agricultural Research and Education Complex of Western Kentucky University to evaluate efficacy, phytotoxicity, and cover crop response of herbicide combinations in dark fire cured tobacco. A randomized complete block design was used with nine treatments replicated three times. Hydroponic tobacco transplants (c.v. 'TND950') were established on May 20,1999 in a conventionally tilled system on a Pembroke silt loam (Mollic Palleudalf) with a pH of 5.8 and an organic matter content of 1.2%. The transplants were established at a popula
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38

Treadwell, Danielle Dion. "Tillage and cover crop management influence weeds, insects, soil and crop nutrients, crop development and yield in organically managed North Carolina sweetpotato Ipomoea batatas (L.) Lam. systems." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-06182005-181203/.

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In 2004, North Carolina supplied 46% of the nations' sweetpotato and generated 79 million dollars for the state but of the 16,000 ha in production that year; only 405 ha were managed according to federal organic standards. A three-year field experiment was initiated in 2001 to evaluate organic sweetpotato ?Beauregard? production systems that varied in cover crop management and tillage. Three organic systems including 1) compost and no cover crop with tillage (Org-NC), 2) compost and cover crop incorporated prior to transplanting (Org-CI), and 3) compost and cover crop with reduced tillage (Org
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39

Hackman, Jacob James. "THE EFFECTS OF COVER CROPS ON THE SOIL MICROBIOME: A METAGENOMICS STUDY." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/theses/2401.

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To our knowledge, this metagenomics study is the first of its kind to determine how cover crops and tillage management practices affect the soil microbiome in southern Illinois. Seven different cover crops were used over the course of two years from 2014 to 2015, and two different forms of tillage were used: Conventional Tillage (CT) and No-Tillage (NT). Four barcodes were used to generate libraries for the phylogenetic identification of fungi, bacteria, oomycetes, and fusaria: the ITS1, EF1a (Elongation Factor 1-a), and the V4 region of the 16s rRNA subunit. Targeted amplicon sequencing using
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Smith, Joshua Dwayne. "Impacts of Cover Crops on Carbon Dioxide and Nitrous Oxide Flux from a Row Crop Agricultural Field in Central Illinois." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1391.

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In the United States, there is renewed interest in incorporating cover crops into agricultural systems to provide a variety of potential benefits related to soil quality, water quality, and greenhouse gas emissions. This study focused on assessing whether cover crops influence N2O and CO2 emissions in a central Illinois agricultural research field over two years (2011-2013) of cover crop growing seasons. Three winter cover crop systems, annual ryegrass (Lolium multiflorum), cereal rye (Secale cereale), and a cereal rye (2011)/ hairy vetch (Vicia villosa) (2012) rotation were planted after fal
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Hagarty, Brooke Danielle. "The Impacts of Cover Crops and Tillage on Nitrate-N Concentrations in Soil Water in Southern Illinois Row Crop Agriculture." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2502.

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Nitrate, as a water contaminant, can have many detrimental impacts on ecosystem and human health. With agriculture as one of the largest contributors to nitrate pollution in streams, the need to adapt agricultural practices that are less harmful to the environment is crucial. Furthermore, the need for optimizing agriculture production, while decreasing the impacts of nitrate leaching, becomes more critical as the world population grows. The purpose of this research was to evaluate methods for reducing nitrate leaching from agricultural fields and to determine the effectiveness of cover croppin
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42

Askew, Matthew Carter. "Rapeseed (Brassica napus L.) Termination and Integration of Halauxifen into Virginia Cotton (Gossypium hirsutum L.) Production." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/86786.

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Cover crops have become an important part of cropping systems in the United States, especially in the Mid-Atlantic region. Rapeseed is a popular choice due to its deep growing taproot which creates soil macropores and increases water infiltration. If not properly terminated rapeseed can become problematic due to its pod-shattering tendency and its difficulty to terminate with herbicides once it enters reproductive growth. Results indicate termination of rapeseed is most effective when the cover crop is small. Combinations that successfully terminated rapeseed include glyphosate plus 2,4-D a
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Henry, David Christopher. "Nitrogen Contribution from Red Clover for Corn Following Wheat in Western Ohio." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1293556551.

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44

McNairn, Heather Elizabeth. "Radar response to crop residue cover and tillage application on post-harvest agricultural surfaces." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0017/NQ47579.pdf.

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45

Barona, Elizabeth. "Identifying the role of crop production in land cover change in Brazil, 1990-2006." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32278.

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Crop production in Brazil has changed significantly over the last decade. New crops are being cultivated to satisfy the world's growing demand for Brazilian export products —a demand that has caused substantial changes in land use and cover, mainly characterized by the increase in large-scale mechanization of agriculture, deforestation, and intensification of agricultural land use. Brazil currently provides crop production information at the municipality level. This information was analyzed using Geograph
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46

Jacobs, Addison Denae. "Influence of Cover Crop Species on Soil Physical Properties in a Corn-soybean Rotation." Thesis, Arkansas State University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10831039.

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<p> As crop land decreases and population increases, soil quality is becoming a concern. Utilizing cover crops in cropping systems could improve soil quality. This study examined 16 treatments of single-species cover crops, cover crop mixes, and two control treatments on a silt-loam soil, in a corn (<i> Zea mays</i> L.) - soybean (<i>Glycine max</i> L. <i> Merr</i>.) crop rotation under no-tillage, to determine their effect on soil physical properties. Cover crop biomass differed (p&lt;0.10) among treatments and produced a maximum of 15.6 Mg ha<sup>-1</sup> of biomass in the crimson clover tre
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47

Wolters, Bethany Rose. "To Mix or Not to Mix: Performance and Management of Diverse Cover Crop Mixtures." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/96592.

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Cover crops (CC) are planted in between cash crops to improve soil quality and to supply nitrogen (N) to cash crops through biological N fixation or soil N scavenging. Most producers use single species CC, in part because potential benefits of using mixtures of three or more CC species are poorly understood. A three-year study was initiated at Painter, Virginia to observe effects of CC mixtures on a no-till (NT) corn (Zea mays), wheat (Triticum aestivum L.), and soybean (Glycine max) rotation to measure CC performance, N cycling, cash crop yield, and soil quality in a sandy, low organic matter
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48

Trott, Donna M. "Assessing near-field naturally occurring isothiocyanates emissions after mustard green manure cover crop incorporation." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Summer2009/d_trott_071609.pdf.

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Thesis (M.S. in environmental science)--Washington State University, August 2009.<br>Title from PDF title page (viewed on Aug. 7, 2009). "School of Earth and Environmental Sciences." Includes bibliographical references.
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49

Couedel, Antoine. "Analysis of performances of crucifers-legumes cover crop mixtures to provide multiple-ecosystem services." Thesis, Toulouse, INPT, 2018. http://www.theses.fr/2018INPT0097/document.

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Les cultures intermédiaires multi-services (CIMS) implantées en interculture entre deux cultures de rente permettent de produire de nombreux services écosystémiques. Parmi les familles d’espèces utilisées comme CIMS, les crucifères réduisent efficacement la lixiviation de nitrate et de sulfate en captant l’azote (N) et le soufre (S) minéral du sol (services de piège à N et à S). Les crucifères ont aussi la capacité de contrôler les pathogènes via des composés biocides issus de l’hydrolyse de métabolites secondaires appelés glucosinolates (GSL). L’objectif de nos travaux de recherche est d’éval
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50

Schmitt, Mattie Bree. "Factors Affecting Establishment and Growth of Cover Crops in a Corn-Soybean Rotation." Thesis, North Dakota State University, 2020. https://hdl.handle.net/10365/31758.

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In the Midwest, it can be beneficial to interseed cover crops into corn (Zea mays L.) since there is a limited time for them to establish and grow after corn harvest. Research conducted in four environments in North Dakota quantified the impacts of planting method and time of planting when grown with or without corn competition on the establishment, and development of three cover crop species. Limited light intensity (less than 20%) under the corn canopy drastically reduced cover crop development. Soil water can also constrain cover crop establishment. Model simulations suggest soil water is m
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