Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Plant Sciences (256)
- Agriculture (243)
- Physical Sciences and Mathematics (178)
- Earth Sciences (150)
- Soil Science (136)
-
- Agronomy and Crop Sciences (115)
- Education (95)
- Environmental Sciences (93)
- Curriculum and Instruction (88)
- Agricultural Science (62)
- Biology (62)
- Natural Resources Management and Policy (61)
- Ecology and Evolutionary Biology (51)
- Forest Sciences (49)
- Horticulture (47)
- Microbiology (45)
- Water Resource Management (43)
- Plant Biology (36)
- Animal Sciences (28)
- Social and Behavioral Sciences (26)
- Botany (25)
- Plant Pathology (25)
- Environmental Microbiology and Microbial Ecology (24)
- Terrestrial and Aquatic Ecology (22)
- Weed Science (21)
- Environmental Monitoring (19)
- Hydrology (19)
- Environmental Indicators and Impact Assessment (16)
- Natural Resources and Conservation (15)
- Institution
-
- University of Nebraska - Lincoln (127)
- Utah State University (91)
- University of Kentucky (80)
- Department of Primary Industries and Regional Development, Western Australia (72)
- TÜBİTAK (26)
-
- Kansas State University Libraries (18)
- University of Arkansas, Fayetteville (12)
- Selected Works (9)
- University of Tennessee, Knoxville (9)
- Stephen F. Austin State University (8)
- The University of Maine (8)
- Western University (7)
- California Polytechnic State University, San Luis Obispo (6)
- Dartmouth College (6)
- Michigan Technological University (6)
- University of Wollongong (6)
- Brigham Young University (5)
- John Carroll University (5)
- Ministry of Higher and Secondary Specialized Education of the Republic of Uzbekistan (5)
- University of Vermont (5)
- West Virginia University (5)
- Louisiana State University (4)
- Old Dominion University (4)
- Union College (4)
- University of Massachusetts Amherst (4)
- University of South Florida (4)
- Claremont Colleges (3)
- Iowa State University (3)
- Langston University (3)
- Roger Williams University (3)
- Publication Year
- Publication
-
- University of Nebraska-Lincoln Extension: Historical Materials (84)
- Resource management technical reports (41)
- Agronomy Notes (37)
- IGC Proceedings (1997-2023) (29)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (19)
-
- All Current Publications (15)
- Kansas Agricultural Experiment Station Research Reports (15)
- Aspen Bibliography (13)
- UAES Bulletins (12)
- Turkish Journal of Agriculture and Forestry (11)
- Agriculture reports (10)
- All Archived Publications (10)
- Nebraska Agricultural Experiment Station: Historical Circulars (10)
- Plant and Soil Sciences Faculty Publications (8)
- Bulletins 4000 - (7)
- Electronic Theses and Dissertations (7)
- Faculty Publications (7)
- Honors Theses (7)
- Wild Blueberry Research Reports (7)
- Dartmouth Scholarship (6)
- Department of Agronomy and Horticulture: Faculty Publications (6)
- Faculty of Science - Papers (Archive) (6)
- Graduate Theses and Dissertations (6)
- Land resources series (6)
- Masters Theses (6)
- Theses and Dissertations (6)
- Turkish Journal of Botany (6)
- Electronic Thesis and Dissertation Repository (5)
- Graduate Theses, Dissertations, and Problem Reports (5)
- Articles (4)
- Publication Type
- File Type
Articles 1 - 30 of 631
Full-Text Articles in Life Sciences
Near-Surface Soil Property Change Over Time In Two Native Tallgrass Prairies In The Arkansas River Valley, Katie Jansson
Near-Surface Soil Property Change Over Time In Two Native Tallgrass Prairies In The Arkansas River Valley, Katie Jansson
Crop, Soil and Environmental Sciences Undergraduate Honors Theses
One climate-change mitigation pathway is soil carbon (C) sequestration, which removes carbon dioxide from the atmosphere and stores C in various forms in the soil. Native prairie soils have long been known for their soil C sequestration abilities, but the full extent of their sequestration capacity is not completely understood. This study evaluated the effect of soil depth and soil map unit/prairie combination on changes in various soil properties over time from 2018 to 2022 in the top 20 cm of two native tallgrass prairie soils in the Arkansas River Valley in west-central Arkansas. Soil samples were collected from the …
Comparison Of Private And Public Lab Fertilizer Recommendation Impacts On Field Crop Production And Soil Test Results, Megan Baker
Comparison Of Private And Public Lab Fertilizer Recommendation Impacts On Field Crop Production And Soil Test Results, Megan Baker
All Graduate Theses and Dissertations, Fall 2023 to Present
There are many sources that farmers utilize to determine fertilizer needs for crops such as private and public labs, crop advisors, and fertilizer dealers. In many cases, these sources provide recommendations for a specific crop that can vary greatly, which can lead to large differences in cost. An experiment was established in 2021 with 12 sites across the state of Utah in alfalfa, small grains, and corn to test and compare fertilizer recommendations from five labs. The recommendations tested were from two public labs (Utah State University and the University of Idaho) and three commercial labs located in the Western …
Effect Of Tannin In Animal Diet On Nitrification Rate Of Pasture Soil Under Dung Patches, J R. Crush
Effect Of Tannin In Animal Diet On Nitrification Rate Of Pasture Soil Under Dung Patches, J R. Crush
IGC Proceedings (1997-2023)
The rate of formation of nitrate and ammonium in the soil under dung patches was compared for dung from animals fed either ryegrass (Lolium perenne)/white clover (Trifolium repens) or ryegrass/Lotus pedunculatus forage. Tannin derived from the Lotus did not inhibit ammonification in the soil under dung but nitrate formation was strongly inhibited. The results support the theory that polyphenolics may bind to nitrite in acid soils and cause immobilisation of mineral nitrogen. Apart from their effect of reducing the proportion of dietary nitrogen excreted in urine, tannins in animal diets may make a further contribution to …
A Comparison Of Production And Soils In Modified Mixed Prairie Community, S W. Porter, W D. Willms, J F. Dormaar, B H. Ellert, H H. Janzen
A Comparison Of Production And Soils In Modified Mixed Prairie Community, S W. Porter, W D. Willms, J F. Dormaar, B H. Ellert, H H. Janzen
IGC Proceedings (1997-2023)
This study examined the effects of reseeding a Stipa-Agropyron- Bouteloua community to monocultures of crested wheatgrass (Agropyron cristatum (L.) Geartn.), Russian wild rye grass (Elymus junceus Fisch.), and wheat (Triticum aestivum L.) on above and below ground biomass and indicators of soil quality. Summer fallowed wheat produced 10817 kg ha-1 and 4090 kg ha-1 of above ground below ground biomass respectively whereas the native community produced 3191 kg ha-1 above ground and 13013 kg ha-1 of below ground biomass. However wheat, crested wheatgrass and Russian wildrye grass generally showed a lower biological index, phosphatase and dehydrogenase activity.
Can You Have Your Cake And Eat It Too? Impact Of Grazing Cover Crops On Soil Properties, M. E. Drewnoski
Can You Have Your Cake And Eat It Too? Impact Of Grazing Cover Crops On Soil Properties, M. E. Drewnoski
IGC Proceedings (1997-2023)
Does grazing of cover crops negate the soil health benefits of cover crops (CC)? A review of the literature was conducted to understand the soil impacts of grazing CC compared to a non-grazed CC control. Grazing CC did increase soil compaction in 50% of cases, but this increase was below the threshold that would be expected to impact root growth in most cases. It does appear that grazing under wet soils or high stocking rates can compact soil. Grazing did not affect wet aggregate stability in 83% of the studies. Soil carbon concentration was unaffected in 70% of the studies …
The Effect Of Organic And Chemical Fertilizers On The Activity Of Soil Enzymes In Soils Of Different Compositions, Elif Yağanoğlu, Adi̇l Aydin
The Effect Of Organic And Chemical Fertilizers On The Activity Of Soil Enzymes In Soils Of Different Compositions, Elif Yağanoğlu, Adi̇l Aydin
Turkish Journal of Agriculture and Forestry
In this study, the effects of chemical (20:20:0 compound) and organic (barnyard) fertilizers applied to different textured soils on several soil enzyme (urease, acid phosphatase, alkaline phosphatase, and dehydrogenase) activities were investigated. The research was conducted under greenhouse conditions with (beans and corn) and without crops. Considering the results of the preexperiment analysis of the soils, a 40-g pot–1 of farmyard manure was placed into the pots in which organic fertilizer would be applied in clay and silty loam soils, and a 50-g pot–1 of farmyard manure was added to sandy loam soil; in addition, a 0.25-g pot–1 of 20:20:0 …
The Influence Of High Density Grazing And Conventional, Rotational Grazing On Soil And Vegetation Parameters In The Semi-Arid And Mesic Grasslands Of South Africa, Jamie Paulse, C. Visser, P. J. Malan, G. N. Smit, F. H. De Witt
The Influence Of High Density Grazing And Conventional, Rotational Grazing On Soil And Vegetation Parameters In The Semi-Arid And Mesic Grasslands Of South Africa, Jamie Paulse, C. Visser, P. J. Malan, G. N. Smit, F. H. De Witt
IGC Proceedings (1997-2023)
In South Africa, multi-camp rotational grazing using ‘conservative stocking rates’ have been the conventional approach to livestock grazing management systems. However, as of late, the high-desnity approach (used interchangeably – depending on the situation – with regenerative grazing, mob grazing, short duration, high pressure grazing, rapid rotation, time controlled, ultra-high density, holistic grazing and holistic resource management) has been adopted by numerous farmers. This approach is considered to be an adaptable one, incorporating the ‘herd effect’ concept, whereby large numbers of animals occupy an area for short periods of time, and allowed an extended rest period. It claims to improve …
Trichoderma Indica: A New Species In The Longibrachiatum Clade From Western Ghats, India, Ajay Lagashetti, Sanjay Singh, Paras Nath Singh
Trichoderma Indica: A New Species In The Longibrachiatum Clade From Western Ghats, India, Ajay Lagashetti, Sanjay Singh, Paras Nath Singh
Turkish Journal of Botany
Trichoderma is a hyperdiverse genus that comprises species showing a wide range of applications. In this study, we have found an isolate of the genus Trichoderma from a soil sample collected from Vetal Hill, Pune, Maharashtra State, India. The isolate was found to be morphologically distinct compared to other isolates of the Longibrachiatum clade showing longer phialides and shorter conidia. Moreover, a phylogenetic analysis based on combined sequence data of the second-largest nuclear RNA polymerase subunit (rpb2), and the translation elongation factor 1-α (tef1-α) confirmed the uniqueness of the present isolate, showing an independent branch supported by strong bootstrap values …
Effect Of Litter Addition On Amino Acid Content And Composition In Alpine Meadow Soil, Yanli L. Feng, X. Y. Li, W. Z. Zong, J. Wang
Effect Of Litter Addition On Amino Acid Content And Composition In Alpine Meadow Soil, Yanli L. Feng, X. Y. Li, W. Z. Zong, J. Wang
IGC Proceedings (1997-2023)
Litter plays an important role in plant-soil nutrient cycling. However, the response of soil amino acid pools to litter input is unclear. Therefore, the aim of this study was to explore the effects of litter addition on the content and composition of soil amino acids in an alpine meadow soil. Soil was amended with litter of its dominant species, Kobresia graminifolia, and incubated for four weeks. Our results show that litter addition significantly increased the exchangeable amino acid content and protease activity in the soil. These results are crucial for understanding the amino acid cycling in soil.
Short-Term Versus Long-Term Effects Of Nitrogen Addition And Warming On Ecosystem N Dynamics In A Grass-Dominated Temperate Old Field, Benjamin F. A. Souriol
Short-Term Versus Long-Term Effects Of Nitrogen Addition And Warming On Ecosystem N Dynamics In A Grass-Dominated Temperate Old Field, Benjamin F. A. Souriol
Electronic Thesis and Dissertation Repository
Increased atmospheric nitrogen (N) deposition and climate warming are both anticipated to influence the ecosystem N dynamics of northern temperate ecosystems substantially over the next century. Nevertheless, in field experiments with N addition and warming treatments, temporal scale can play an important role in determining the extent of treatment effects on N dynamics, and it is unclear to what extent the results of short-term studies can be extrapolated to responses over longer time scales. I compared the short-term versus long-term effects of N addition and warming on net N mineralization, N leaching, and N retention in a grass-dominated old field. …
Fire Effects On Soil Organic Matter In The Creek Fire, Gracie E. Doolin
Fire Effects On Soil Organic Matter In The Creek Fire, Gracie E. Doolin
Master of Science in Environmental Sciences and Management Projects
Wildfires have increased in frequency and severity over the past few decades due to the increased concertation of CO2 emissions from anthropogenic influence. Soil carbon (C) sequestration has been identified as a climate change mitigation strategy; however, the influx of large-scale wildfires has accelerated landscape processes such as erosion, reducing soil aggradation, and soil C and nitrogen (N) protection. This trend is highlighted by the Creek Fire that occurred in September 2020 and burned 379,895 acres in the Sierra National Forest. This research is designed to close the knowledge gap regarding the impact of burn severity on soil organic matter …
Spatial Distribution Of Soil Macroinvertebrates In A Dry Steppe (South-Eastern Siberia, Russia), K. B. Gongalsky
Spatial Distribution Of Soil Macroinvertebrates In A Dry Steppe (South-Eastern Siberia, Russia), K. B. Gongalsky
IGC Proceedings (1997-2023)
Soil macroinvertebrates are important components of ecosystems. They play a key role in decomposition processes and turnover of the most of elements. Adequate estimation of abundance and biomass of these animals is fundamental for understanding their input in steppe ecosystems. Asian steppes of Russia are poorly studied. Therefore, baseline soil invertebrate composition, abundance and rules of distribution were estimated.
Grazing Effects On Spatial Microdistribution Of Soil Macroinvertebrates In A Steppe Of European Russia, F. A. Savin, K. B. Gongalsky, A. D. Pokarzhevskii
Grazing Effects On Spatial Microdistribution Of Soil Macroinvertebrates In A Steppe Of European Russia, F. A. Savin, K. B. Gongalsky, A. D. Pokarzhevskii
IGC Proceedings (1997-2023)
Measures of ecosystems and their populations include biomass, production and trophic composition and animal spatial distribution. Grazing of grasslands influences spatial distribution of vegetation seriously. The same effects on soil macroinvertebrates are less well studied. Spatial distribution is usually studied at a coenosis level, and not at a studied point level, although the scale of sampling has a giant importance in estimation of organism's distribution. The aim of our study was to estimate grazing impact on large soil invertebrates in steppe ecosystems in Chernozem Nature Reserve in Russia.
Soil Enzyme Activities As Bio Indicators Of Soil Ph And Fertility In Temperate Grassland, Iker Mijangos, A. Ibarra, Isabel Albizu, Sorkunde Mendarte, Carlos Garbisu
Soil Enzyme Activities As Bio Indicators Of Soil Ph And Fertility In Temperate Grassland, Iker Mijangos, A. Ibarra, Isabel Albizu, Sorkunde Mendarte, Carlos Garbisu
IGC Proceedings (1997-2023)
In recent years, biological indicators are being used to estimate the continued capacity of a given soil to function (i.e., soil health). After all, biological processes are intimately linked with the maintenance of soil structure and fertility, being more sensitive to changes in the soil than conventional physicochemical parameters. Soil enzymes, as mediators and catalysts of vital soil functions, offer great potential as integrative indicators of soil health (Dick et al., 1996). The main aim of the current work was to study the potential of soil enzyme activities as biological (more precisely, biochemical) indicators of soil physicochemical …
Cattle Overwintering Areas In Middle-European Conditions - Important “Point” Sources Of Nitrous Oxide Emissions, M. Šimek, J. Hynšt, P. Brůček, J. Čuhel, D. Elhottová, H. Šantrůčková, V. Kamír
Cattle Overwintering Areas In Middle-European Conditions - Important “Point” Sources Of Nitrous Oxide Emissions, M. Šimek, J. Hynšt, P. Brůček, J. Čuhel, D. Elhottová, H. Šantrůčková, V. Kamír
IGC Proceedings (1997-2023)
Nitrous oxide (N2O) emissions in grazed grasslands are strongly influenced by animal excreta (Fowler et al., 1997). In addition, soil compaction caused by animal traffic significantly influences soil physical conditions and thus directly or indirectly impacts on the microbial processes producing N2O. In the Czech Republic pastures are mostly located in hilly and mountain areas. During the growing season, cattle are typically grazing, while during the winter the animals are concentrated near the animal house on a relatively small plot called an "overwintering area". The objective of this study was to estimate the fluxes of …
Investigation Of The Vira Linker Domain To Characterize Its Phenol Interactions, Jessica Garofalo
Investigation Of The Vira Linker Domain To Characterize Its Phenol Interactions, Jessica Garofalo
Honors Theses
The soil bacterium Agrobacterium tumefaciens causes tumors in plants through interkingdom gene transfer. This transfer is initiated upon a wounding event that results in the release of plant signaling factors such as phenols and sugars that are recognized by protein machinery in the periplasm and inner membrane of A. tumefaciens. The histidine kinase protein VirA, in combination with the periplasmic protein ChvE, recognizes these signals and initiates induction of virulence genes via a signaling pathway, culminating with the insertion of tumor-inducing T-DNA into the wounded plant cells. While the interaction between the Periplasmic domain of VirA and sugar-bound ChvE …
Linking Decomposition Reactions In Arctic Soils To Microbial Enzyme Production, Jane Karen Martinez
Linking Decomposition Reactions In Arctic Soils To Microbial Enzyme Production, Jane Karen Martinez
Open Access Theses & Dissertations
Microbial processes such as soil enzyme production are a major driver of decomposition and a current topic of interest in arctic soils due to the effects of climate warming. Despite the advances in understanding soil enzymes, there are still knowledge gaps regarding the role of enzymes in decomposition. In this dissertation, I addressed three of those gaps in the following chapters: (Ch.2) to explore the location of enzymes within the soil matrix, (Ch.3) to identify peptides matched to soil enzymes produced by microorganisms for organic matter decomposition, and (Ch.4) understand the longevity of enzymes in the soil after microbial production. …
Isolating And Characterizing Lipid Degrading Microbes From Human Decomposition Soils, Brooke Amara Talley, Allison R. Mason, Jennifer Debruyn
Isolating And Characterizing Lipid Degrading Microbes From Human Decomposition Soils, Brooke Amara Talley, Allison R. Mason, Jennifer Debruyn
Chancellor’s Honors Program Projects
No abstract provided.
Impact Of Cover Crop Species Diversity On Soil Nutrient Availability And Crop Productivity, Amanda Kramer
Impact Of Cover Crop Species Diversity On Soil Nutrient Availability And Crop Productivity, Amanda Kramer
Masters Theses
Cover crops provide multiple environmental benefits that improve both soil and water quality; however, farmers only utilize them on approximately 5% of harvested U.S. cropland. Low adoption rates are attributed to yield impact concerns, seed and planting costs, and lack of advocacy. This study, which began in October 2019, assessed the effects of nitrogen rate and cover crop diversity on weed biomass, soil coverage, in-situ residue decomposition, soil nitrogen and phosphorus availability, and cash crop yield to better understand the costs and benefits of cover crop adoption at two locations in Tennessee (Milan and Spring Hill). Treatments were replicated 4 …
The Gardens Nearby: A Narrative Podcast Exploring Soil Contamination And Community Gardening In Burlington, Vt, April Mcilwaine
The Gardens Nearby: A Narrative Podcast Exploring Soil Contamination And Community Gardening In Burlington, Vt, April Mcilwaine
Food Systems Master's Project Reports
The city of Burlington, Vermont (Burlington) is home to the Burlington Area Community Gardens (BACG), a program of the Burlington Parks and Recreation Department. This program has a 50-year legacy in the Burlington community and today comprises 14 garden sites that serve over 1,400 people. Within the framework of food sovereignty, community gardens are valuable, multi-functional spaces that positively benefit residents and neighborhoods alike. However, planting gardens in reclaimed urban spaces may come with food safety concerns. Like other cities that have an industrial heritage, some of Burlington’s urban areas may have soils with high levels of toxic heavy metals …
Complete Genome Sequences Of Chop, Delrio, And Grandslam, Three Gordonia Phages Isolated From Soil In Central Arkansas, Heidi N. Mathes, Elijah I. Christenson, John H. Crum, Emme M. Edmondson, Kassidy E. Gray, Luke W. Lawson, Lauren E. Lee, Michael P. Lee, Jackson A. Lipscomb, Morgan E. Masengale, Hannah G. Matthews, Charles M. Mcclain 4th, Tuesday N. Melton, Trace H. Morrow, Alexis M. Perry, David R. Rainwater, Grace E. Renois, Maryann F. Rettig, Duncan C. Troup, Allie J. Wilson, Nathan Reyna, Ruth Plymale
Complete Genome Sequences Of Chop, Delrio, And Grandslam, Three Gordonia Phages Isolated From Soil In Central Arkansas, Heidi N. Mathes, Elijah I. Christenson, John H. Crum, Emme M. Edmondson, Kassidy E. Gray, Luke W. Lawson, Lauren E. Lee, Michael P. Lee, Jackson A. Lipscomb, Morgan E. Masengale, Hannah G. Matthews, Charles M. Mcclain 4th, Tuesday N. Melton, Trace H. Morrow, Alexis M. Perry, David R. Rainwater, Grace E. Renois, Maryann F. Rettig, Duncan C. Troup, Allie J. Wilson, Nathan Reyna, Ruth Plymale
Articles
Chop, DelRio, and GrandSlam are phage with a Siphoviridae morphotype isolated from soil in Arkansas using the host Gordonia terrae 3612. All three are temperate, and their genomes share at least 96% nucleotide identity. These phage are assigned to cluster DI based on gene content similarity to other sequenced actinobacteriophage.
Comparison Of Biodiversity And Abundance Of Earthworms In Maize Croplands, Irrigated With Sewage And Canal Water Of District Faisalabad, Pakistan, Sana Aziz, Nazia Ehsan, Fariha Latif, Muhammad Sarfraz Ali, Sajid Abdullah
Comparison Of Biodiversity And Abundance Of Earthworms In Maize Croplands, Irrigated With Sewage And Canal Water Of District Faisalabad, Pakistan, Sana Aziz, Nazia Ehsan, Fariha Latif, Muhammad Sarfraz Ali, Sajid Abdullah
Journal of Bioresource Management
The diversity and richness of earthworms that were irrigated with canal (Chak 200 RB Lathianwala) and sewage (Chokera) water in the district of Faisalabad were determined from August to November 2020. For collection of specimens, hand picking and digging method was used and then preserved in formalin. AAS (Atomic absorption spectrophotometer) was used to check the concentration of heavy metals in both water and soil samples. Total 10 species were identified from Chak 200 RB Lathianwala and showed Shannon-Weiner Diversity Index (H') =2.13, Evenness = 0.93 and Dominance = 0.07. The significant difference in abundance were determined (t = 7.7115, …
Soil Sampling Guide For Crops, Matt Yost, Grant Cardon, Megan Baker, Jody Gale, Earl Creech, Michael Pace, Kalen Taylor, Cody Zesiger, Tiffany Evans, Rhonda Miller
Soil Sampling Guide For Crops, Matt Yost, Grant Cardon, Megan Baker, Jody Gale, Earl Creech, Michael Pace, Kalen Taylor, Cody Zesiger, Tiffany Evans, Rhonda Miller
All Current Publications
This fact sheet provides updated guidelines for soil sampling of various soil properties and includes why, how, what, and where to sample. It is a part of a series of updated sampling guidelines. Water, forage, plant tissue, and manure/compost will be forthcoming.
The World Of Underground Ecology In A Changing Environment, Elsa Abs, Moira Hough
The World Of Underground Ecology In A Changing Environment, Elsa Abs, Moira Hough
Michigan Tech Publications
This special feature presents state-of-the-art soil ecological science and was sparked following the 2-day long online live event entitled “Ecology Underground” during the Ecological Society of America annual meeting of 2020. Here, we, the co-guest-editors of this special feature, present this body of research in context of the current state of the field. This issue highlights that we are currently in a hot time for microbial research in soil science. Specifically, we find that two themes emerge from this corpus as key next questions to answer to move the field forward. How do microbial processes scale up in space and …
Determination Of Taxonomic Placement Of Falsely-Branched Taxa In Soils Of San Nicolas Island And Reassessment Of The Tolypothrichaceae, Natalie Soliman
Determination Of Taxonomic Placement Of Falsely-Branched Taxa In Soils Of San Nicolas Island And Reassessment Of The Tolypothrichaceae, Natalie Soliman
Celebration of Scholarship 2023
No abstract provided.
Evaluating The Relative Influence Of Soil Water Potential, Soil Moisture, And Vapor Pressure Deficit On Semi-Arid Vegetation Dynamics, Kayla R. Jamerson
Evaluating The Relative Influence Of Soil Water Potential, Soil Moisture, And Vapor Pressure Deficit On Semi-Arid Vegetation Dynamics, Kayla R. Jamerson
Graduate Student Theses, Dissertations, & Professional Papers
Knowledge of vegetation’s response to soil water availability and atmospheric demand is critical to understanding the impact of climate change on semi-arid ecosystems. However, limited field-based research has been conducted to assess the relative importance of these drivers and previous research has simplified the assessment of soil water availability by relying on soil volumetric water content (VWC) as a primary control on plant growth, which, as opposed to soil water potential (Ψsoil), does not account for the effects of soil texture on plant available water. To address these gaps, we compared remotely sensed indicators of vegetation response to field based …
Distribution Patterns Of Allorhizobium Vitis In Missouri Vineyards And Non-Vineyard Soils, Jacquelyn M. Wray
Distribution Patterns Of Allorhizobium Vitis In Missouri Vineyards And Non-Vineyard Soils, Jacquelyn M. Wray
MSU Graduate Theses
Crown gall disease causes significant economic loss to the grape and wine industry. Preventive strategies are most effective for mitigating the loss of grapevines in vineyards, as there is no known cure for this disease. The bacterium Allorhizobium vitis carrying a tumor-inducing (Ti) plasmid is the causative agent. A. vitis bacteria live systemically in the grapevine before causing visible symptoms and can survive in residual plant tissues and soil for more than two years. Diagnostic methods have been developed to detect A. vitis bacteria in grapevines and soil. However, more reliable, specific, and high-throughput diagnostics are still needed for screening …
Tree Biomass – A Fragile Carbon Storage In Old-Growth Birch And Aspen Stands In Hemiboreal Latvia, Laura Ķēniņa, Didzis Elferts, Ieva Jaunslaviete, Endijs Bāders, Guntars Šņepsts, Āris Jansons
Tree Biomass – A Fragile Carbon Storage In Old-Growth Birch And Aspen Stands In Hemiboreal Latvia, Laura Ķēniņa, Didzis Elferts, Ieva Jaunslaviete, Endijs Bāders, Guntars Šņepsts, Āris Jansons
Aspen Bibliography
Birch (Betula pendula Roth, Betula pubescens Ehrh.) and European aspen (Populus tremula L.) stands dominate the deciduous forests of Northern Europe. Due to increasing forest protections, more deciduous stands will reach the old-growth stage. Thus, data on the carbon storage potential in such areas are essential. We aimed to establish a benchmark for carbon stocks of the main carbon pools in old-growth deciduous hemiboreal stands. Carbon pools were calculated from measurements in forty old-growth (104–148 years-old) deciduous stands in forests on fertile mineral soil. The carbon stock in these stands is distributed across tree biomass (~ 60%), mineral soil (~ …
Nitrogen Transfer From Cover Crops To The Subsequent Grain Crop And The Influence Of Variability In Winter Conditions, Spencer Heuchan
Nitrogen Transfer From Cover Crops To The Subsequent Grain Crop And The Influence Of Variability In Winter Conditions, Spencer Heuchan
Electronic Thesis and Dissertation Repository
Cover crops, which are used to provide ground cover after the harvest of the grain crop, can potentially improve the sustainability of agroecosystems by reducing nutrient losses. However, few data are available to document the extent to which cover crops improve both the retention of soil nitrogen (N) and the transfer of this N to the grain crop. The efficiency of this N transfer may be further influenced by variation in winter soil temperature; for example, reduced snow cover can increase the frequency and intensity of soil freezing, which can affect the survival of cover crops and the timing of …
Diagnosing Excess Nitrogen In Rice Using Post-Season Tissue Samples, Kyle Hoegenauer
Diagnosing Excess Nitrogen In Rice Using Post-Season Tissue Samples, Kyle Hoegenauer
Graduate Theses and Dissertations
Proper nitrogen (N) management in rice production can be difficult to achieve without the aid of tools such as soil and tissue tests. There are no tests currently available to rice producers that determine whether N has been managed properly throughout the season or that detect instances of over fertilization. Rice stalk samples were collected from N response trials within 3 days of harvest from the primary Arkansas rice growing region in 2016-2018. Stalk samples were analyzed for N concentration through a KCl extraction and spectrofluorometric quantification. Samples analyzed with leaf material intact contained statistically different N concentrations than samples …