Open Access. Powered by Scholars. Published by Universities.®

Plant Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

37,752 Full-Text Articles 53,971 Authors 9,697,390 Downloads 270 Institutions

All Articles in Plant Sciences

Faceted Search

37,752 full-text articles. Page 1 of 1029.

Comparison Of Private And Public Lab Fertilizer Recommendation Impacts On Field Crop Production And Soil Test Results, Megan Baker 2024 Utah State University

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 …


Applicability Of Using Bio-Receptive Concrete For Building Facades In Egypt, Gina Roupheil 2024 American University in Cairo

Applicability Of Using Bio-Receptive Concrete For Building Facades In Egypt, Gina Roupheil

Theses and Dissertations

The significant increase in carbon dioxide emissions caused by the construction industry is detrimental to our planet. This is rapidly increasing with the urbanization of cities that is gradually taking its toll on the available green spaces, which help in balancing such emissions. Recently, researchers have been trying to make use of bio-receptivity to create biomaterial systems that could be spread on building envelopes and support the growth of small plant species and microorganisms to establish on. Out of those materials, comes the concrete as a promising material for bio-colonization.

Within this context, this study aims at investigating the applicability …


Breeding Cool-Season Forage Grasses For A Warming Climate, D. P. Malinowski, J. Ford, A. Stewart, D. Woodfield, W. E. Pinchak 2024 Texas A&M AgriLife Research

Breeding Cool-Season Forage Grasses For A Warming Climate, D. P. Malinowski, J. Ford, A. Stewart, D. Woodfield, W. E. Pinchak

IGC Proceedings (2001-2023)

In many parts of the world, changing climatic conditions are resulting in increased temperatures and more variable precipitation, intensifying the duration and severity of drought, especially in summer. Warming climate is considered one reason for the increasing failure of traditional, summer-active cool-season perennial grasses at the margin of their zone of adaptation in naturally C4 grass-dominated ecosystems of the Southern Great Plains of the USA. Two cool-season perennial forage grasses orchardgrass (Dactylis glomerata L.) and tall fescue (Lolium arundinaceum (Schreb.) Darbysh.) are of major economic and ecological importance in these regions. In 2008, we initiated a breeding program …


Invasive Annual Grass Issues In Canadian Rangelands, V. Maloney 2024 Envu 2022 Environmental Science , Canada

Invasive Annual Grass Issues In Canadian Rangelands, V. Maloney

IGC Proceedings (2001-2023)

It has been understood for several years now that Canadian grasslands are among the world’s most endangered ecosystems. While the endangerment of the world’s coral reefs and rainforests may make the news more often, the increasingly fast decline of native Canadian grasslands is having a major impact on species diversity as well as global carbon supplies. In this paper, I will discuss the impact invasive annual grasses have had on two important rangeland ecosystems in Canada. Furthermore, strategies for protecting and restoring these invaluable lands will be discussed.


Forage Data Hub – A Platform For Sharing Valuable Datasets For Resilience, Amanda J. Ashworth, L. Marshall, J. J. Volenec, M. Berti, E. van Santen, C. Williams, V. Gopakumar, J. Foster, V. Picasso, J. Su 2024 USDA-Agricultural Research Service

Forage Data Hub – A Platform For Sharing Valuable Datasets For Resilience, Amanda J. Ashworth, L. Marshall, J. J. Volenec, M. Berti, E. Van Santen, C. Williams, V. Gopakumar, J. Foster, V. Picasso, J. Su

IGC Proceedings (2001-2023)

In accord with the necessity to enhance ecosystem services and productivity in food systems, is the increase of data availability at multiple scales and over time. To help meet this need, we discuss the development of a National Forage Data Hub which will act as a platform to curate, share, and analyze data pertaining to forage systems. This centralized hub will leverage existing datasets by bridging multiple sources including forage crop—soil, water, and nutrient availability—yield (animal and crop) potential (and gaps)— climate—management systems at high spatial and temporal resolution enabling system interaction assessments through next-generation analytics. This novel approach to …


Tennessee Master Beef Producer Program Promotes Sustainable Beef Production, K. M. Mason, G. E. Bates, J. D. Rhinehart 2024 University of Tennessee

Tennessee Master Beef Producer Program Promotes Sustainable Beef Production, K. M. Mason, G. E. Bates, J. D. Rhinehart

IGC Proceedings (2001-2023)

Tennessee is home to 1.75 million beef cattle as of January 2022 (USDA, 2022). The majority of cattle farms in Tennessee are cow-calf operations, with a few stocker-backgrounder operations across the state. Most of the cows in the state are maintained on tall fescue (Schedonorus arundinaceus (Schreb.) Dumort. pastures, with hay being fed in the winter months and sometimes during the summer. Maintenance of a strong cow herd and sufficient grazing land relies on utilization of sustainable production practices. With urban sprawl creating competition for land area, it is important to use production practices that are efficient and attainable …


Guidelines For Optimal Use Of Near Infrared Spectroscopy (Nirs) With Sample Preparation And Presentation Across Instrument Platforms, D. W. McIntosh 2024 University of Tennessee, Knoxville

Guidelines For Optimal Use Of Near Infrared Spectroscopy (Nirs) With Sample Preparation And Presentation Across Instrument Platforms, D. W. Mcintosh

IGC Proceedings (2001-2023)

Guidelines for optimal use of near infrared spectroscopy (NIRS) with sample preparation and presentation across instrument platforms will cover methods and resources specifically for NIRS analysis. Recommendations for sample preprocessing and scanning required to ensure compatibility across calibrations will be highlighted. Proper calibration determinations, monitoring, and performance will be demonstrated to create a baseline for correct use. Additional materials about the use and reporting of nutritive content predictions for publication will be discussed. Goals of this topic session are to develop an understanding of the basics of NIRS technology and provide the basics to what a laboratory is required to …


Challenges And Opportunities For Revegetation In Areas Dominated By Invasive Annual Grasses, B. A. Mealor, J. A. Crose 2024 University of Wyoming

Challenges And Opportunities For Revegetation In Areas Dominated By Invasive Annual Grasses, B. A. Mealor, J. A. Crose

IGC Proceedings (2001-2023)

Invasive annual grasses (IAG) are a primary ecological threat to sustainability and ecological integrity of rangelands in the western U.S. While availability of effective tools to control IAG is increasing, ensuring compatibility of control practices with other management practices, such as seeding desirable species, is a critical information need. We summarize a series of studies investigating influences of timing, seeding depth, species selection, and planting timing with various herbicides in sites dominated by invasive annual grasses.


Transitioning To Multiple-Use Polyculture Grassland-Derived Bioenergy Feedstock Systems, J. P. Muir, J. L. Foster, A. Falk, S. Weiss, W. D. Pitman, W. Alsion, H. D. Naumann, J. R. Bow, C. Shadrock, E. Osei, O. Lasater 2024 Texas AgriLife Research and Extension Service

Transitioning To Multiple-Use Polyculture Grassland-Derived Bioenergy Feedstock Systems, J. P. Muir, J. L. Foster, A. Falk, S. Weiss, W. D. Pitman, W. Alsion, H. D. Naumann, J. R. Bow, C. Shadrock, E. Osei, O. Lasater

IGC Proceedings (2001-2023)

We argue that research and development of grassland-derived bioenergy feedstock (GBF) has focused unduly on dedicated monospecific biomass systems to the detriment of more stable multiple-use multispecies grasslands. This has retarded GBF adoption as a viable, sustainable contribution to renewable energy production in North America. We hypothesize that focusing on multiple-use GBFs will foster greater feedstock availability for nascent renewable energy generation while minimizing financial risk to grassland husbandry during market transitions from current grazing systems to more flexible business models. Our hypothesis is that source and demand are more likely to develop simultaneously under less risky multiple-use grassland management. …


Observing And Simulating Temperate Grasslands In Central Europe, C. Nendel 2024 Leibniz Centre for Agricultural Landscape Research (ZALF), Germany

Observing And Simulating Temperate Grasslands In Central Europe, C. Nendel

IGC Proceedings (2001-2023)

This presentation summarises recent activities to observe grassland features using remote sensing and uses this data to feed mechanistic simulation models for temperate grassland vegetation in Central Europe, in order to assess underlying processes that are difficult to observe. Public interest has recently focused on grassland ecosystem services, such as carbon stocks, nitrate retention and greenhouse gas emissions; variables that in principle can be simulated using models. However, current grassland models suffer from the fact that species dynamics in grasslands are very active, and may change in response to water supply and management. As different species come with different traits, …


The Effect Of Nitrogen Rates And Plant Density On Grain Yield Components And Persistence In Intermediate Wheatgrass (Thinopyrum Intermedium) And Mountain Rye (Secale Strictum), M. T. Newell, N. Munday, R. C. Hayes 2024 NSW Department of Primary Industries, Australia

The Effect Of Nitrogen Rates And Plant Density On Grain Yield Components And Persistence In Intermediate Wheatgrass (Thinopyrum Intermedium) And Mountain Rye (Secale Strictum), M. T. Newell, N. Munday, R. C. Hayes

IGC Proceedings (2001-2023)

Intermediate wheatgrass (IWG; Thinopyrum intermedium) and Mountain Rye (Mtn Rye; Secale strictum) have potential for release as dual-purpose (grazing and grain production) perennial grains in Australia due to their superior longevity compared to hybrid perennial wheats. Initially developed as perennial forage grasses, few management guidelines exist to inform agronomic practices to maximise grain yields and profitability in Australian environments. An experiment was established in 2020 to examine the effect of plant density and nitrogen rates on grain yield components. The experiment compared the two species (IWG, Mtn Rye) sown at three plant densities (50, 100 and 200 plants/m2) …


Participatory Evaluation Of Urochloa (Brachiaria) Grasses In The Cool Highlands Of Central Kenya, Elkana Nyambati, W. Ayako, S. K. Mailu 2024 Kenya Agricultural and Livestock Research Organisation, Kenya

Participatory Evaluation Of Urochloa (Brachiaria) Grasses In The Cool Highlands Of Central Kenya, Elkana Nyambati, W. Ayako, S. K. Mailu

IGC Proceedings (2001-2023)

Grasslands are increasingly threatened by over exploitation, degradation and climate change that has undermined their productive capacity, leading led to inadequate quantity and quality feed. Urochloa grass, a native of eastern Africa has been widely improved and adapted as livestock forage. A farmer participatory study was conducted to evaluate productivity of eight Urochloa grasses (Urochloa brizantha cv. Marandu, U. brizantha cv. Xareas, U. brizantha cv. Piata, U. brizantha cv. MG4, U. decumbens cv. Basilisk, U. humidicola cv. Humidicola, U. humidicola cv. Llanero and Urochloa hybrid Mulato II) compared to controls of Pennisetum purpureum (Napier grass cv. Kakamega 1 …


Is There A Need For Tailored Graduate Programs For International Students?, K. T. Oduor, Lynn E. Sollenberger, J. Dubeux, L. M. D. Queiroz 2024 University of Florida

Is There A Need For Tailored Graduate Programs For International Students?, K. T. Oduor, Lynn E. Sollenberger, J. Dubeux, L. M. D. Queiroz

IGC Proceedings (2001-2023)

International studies often present opportunities for capacity development and mentorship for students to equip them with the knowledge and skills to address the challenges in their home countries. Typically, international graduate students are drawn from diverse educational and cultural backgrounds different from those in their host countries. Adjusting to these changes might be challenging and time-consuming, thus influencing their academic journey. Understanding these challenges might provide international students the opportunity to address them in time and, where possible, seek help. In this paper, we discuss some graduate program-related challenges international students face and provide potential recommendations that might result in …


Sunn Hemp As An Alternative Forage In The Texas High Plains Region, S. A. O’Shaughnessy, H. M. Mosqueda, D. K. Brauer 2024 USDA-ARS

Sunn Hemp As An Alternative Forage In The Texas High Plains Region, S. A. O’Shaughnessy, H. M. Mosqueda, D. K. Brauer

IGC Proceedings (2001-2023)

Forage production in the Texas High Plains, a semi-arid region, is critical to sustain the local cattle industry. However, the main source of water for irrigation is the highly depleted Ogallala Aquifer, making forage crop water productivity (CWP) of high importance. In this one-year study, three types of forages were cultivated under deficit irrigation treatments of 80% and 50% of full crop water use. The forages were: a non-brown midrib forage sorghum; a legume, sunn hemp; and a sorghum/sunn hemp mix. The experiment was conducted in Bushland, Texas in 2019. Treatment plots were arranged in a split plot design with …


Differences In Carbon Sequestration And Water Use Between A Semi-Arid Native Grassland And Encroaching Vachellia Karroo Woodland, C. Weideman, A. R. Palmer, G. Carolyn, Kathleen Smart 2024 Rhodes University, South Africa

Differences In Carbon Sequestration And Water Use Between A Semi-Arid Native Grassland And Encroaching Vachellia Karroo Woodland, C. Weideman, A. R. Palmer, G. Carolyn, Kathleen Smart

IGC Proceedings (2001-2023)

Tree and shrub encroachment and proliferation in global grasslands and savannas is widely considered to imply a trade-off between ecosystem C and H2O regulating functions, based on the premise that increased C sequestration associated with higher woody biomass ostensibly drive declines in water production through concomitant increases in evapotranspiration (ET), but evidence for this across climatic and environmental gradients is equivocal. To evaluate these claims, we ran a paired eddy covariance experiment in a native semi-arid C4 grassland and adjacent encroaching Vachellia karroo woodland on the eastern seaboard of South Africa and compared ecosystem C and H2O budgets over nearly …


Contribute To A Definition Of Extensive Grazing (Mediterranean), J. Potes, J. P. F. Almeida, C. Matos, A. Teixeira 2024 Instituto Politécnico Santarém, Portugal

Contribute To A Definition Of Extensive Grazing (Mediterranean), J. Potes, J. P. F. Almeida, C. Matos, A. Teixeira

IGC Proceedings (2001-2023)

The subject of this paper is a definition of Extensive Grazing from Extensive Systems of Animal Production in Mediterranean environments. The edaphoclimatic characterization is essential to understand the low level of primary productivity as a consequence of irregular precipitation over the year and its absence during the long, dry and hot summer. The powerless of soils justify the limited contribution of plants and make clear the necessary recovery of the soil and storage of water naturally (soil) or artificially (irrigation). Considering the IPBES (Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services) definition of extensive grazing it has been used the …


Soil Carbon Monitoring Program For Ranches In Dryland Ecosystems, David E. Prado-Tarango, S. Ates, J. Talbot 2024 Oregon State University

Soil Carbon Monitoring Program For Ranches In Dryland Ecosystems, David E. Prado-Tarango, S. Ates, J. Talbot

IGC Proceedings (2001-2023)

Implementation of ranching practices that lead to greater soil carbon sequestration has become increasingly important due to rising atmospheric CO2 levels. Sustainable ranching practices are suggested to improve soil health and sequester more carbon in the soil. However, there is a paucity of measured data from replicated on-farm studies to support this premise. Thus, we developed a soil carbon monitoring program for a ranch located in the state of Oregon. Our monitoring program is focused on measuring the net carbon budget and the soil carbon sequestration totals. To achieve this goal, we combined field-sampling data with the COMET-Farm model. A …


Answering Complex Questions As We Make Headway On Annual Grasses And Fire, T. Prather, L. Jones, E. Strand, G. Harrison, K. Johnston 2024 University of Idaho

Answering Complex Questions As We Make Headway On Annual Grasses And Fire, T. Prather, L. Jones, E. Strand, G. Harrison, K. Johnston

IGC Proceedings (2001-2023)

Annual grasses challenge our ability to meet forage production and plant community conservation objectives. Direct competition, potential mutualism, and shortened fire return interval interplay resulting in complexity of how to meet challenges we face. Bromus tectorum presents challenges to sagebrush dominated plant communities with shortened fire return intervals and the advancing invasion of Ventenata dubia poses threats to forage production through competitive interactions that may involve mutualism to enhance V. dubia’s invasion of annual and perennial grass dominated plant communities. Use of fuel breaks can reduce the extent of fires and their proper function hinges on their reduced plant biomass …


Rangeland Devastated By Invasive Annual Grass, H. E. Quicke 2024 Envu

Rangeland Devastated By Invasive Annual Grass, H. E. Quicke

IGC Proceedings (2001-2023)

This paper serves as an introduction to the thematic session on protection and restoration of western US rangelands. Exotic annual grass species have steadily invaded western US rangeland for decades. More recently, the problem of invasive annual grasses received national attention with multiple stakeholders working together under the auspices of Western Governors’ Association to develop a common strategy to fight back.


Preventing Conversion To A Highly Degraded Invasive Dominated System, C. V. Ransom 2024 Utah State University

Preventing Conversion To A Highly Degraded Invasive Dominated System, C. V. Ransom

IGC Proceedings (2001-2023)

Invasive annual grasses (IAG) negatively impact rangeland across the Western US. Within the Intermountain Region, downy brome, Japanese brome, medusahead, and ventenata are among the most prevalent invasive annual grass species. Research conducted at Utah State University has addressed numerous approaches to IAG management as well investigating restoration strategies of highly degraded sites. Under harsh climates common to the Western US, restoration has been extremely challenging, causing focus to shift towards prioritizing the protection of existing desirable plant communities. In either restoration or plant community protection approaches, annual rainfall is the largest driver of success. Changes or shifts in plant …


Digital Commons powered by bepress