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Articles 1 - 30 of 92
Full-Text Articles in Physical Sciences and Mathematics
Genetic Modification – Applications For Forage And Grassland Production Systems, J. R. Caradus
Genetic Modification – Applications For Forage And Grassland Production Systems, J. R. Caradus
IGC Proceedings (1997-2023)
Genetic modification has been extensively used in crops for 25 years but has rarely been a technology used to advance trait expression in forage and grassland species. The exceptions are the use of herbicide tolerance and low lignin traits in alfalfa which are currently commercially available. In crop species genetic modification has been a valuable option for delivering improved economic and environmental outcomes through providing solutions for many of the challenges facing mankind. There are a many beneficial characteristics that genetic modification has the potential to provide in forage and grassland species. Managing these in the environment and understanding consumer …
Environmental Co-Benefits Of Improved Forages In Smallholder Dairy Systems Of Kenya, A. Notenbaert, S. Mwendia, S. Burkart, P. Karimi, E. Mwema
Environmental Co-Benefits Of Improved Forages In Smallholder Dairy Systems Of Kenya, A. Notenbaert, S. Mwendia, S. Burkart, P. Karimi, E. Mwema
IGC Proceedings (1997-2023)
Livestock play a major role across Kenya, especially in smallholder mixed farms through provision of household nutrition and income through milk and meat. Equally, fertilization of cropland benefits from livestock manure, and livestock often act as insurance and saving. Despite the opportunities and benefits livestock production presents, livestock systems are also key drivers of environmental degradation, including increased nutrient loads, GHG emissions, water use, grassland degradation and land-use conversion. Low livestock productivity, largely due to use of low-quality crop residues and natural grasses often not endowed with nutrients key for animal performance, limits the potential positive contributions of livestock and …
Biodiversity And The Ecological Role Of Grasslands Environment And Territory, Elimane Lo, Makhmutov Serguei, Badim Almazov
Biodiversity And The Ecological Role Of Grasslands Environment And Territory, Elimane Lo, Makhmutov Serguei, Badim Almazov
IGC Proceedings (1997-2023)
Biodiversity is all the living species that inhabit the planet: plants, animals, microorganisms, but also their genetic diversity and all the ecosystems in which they live. The preservation of biodiversity is vital, because the organisms that constitute it participate in the major ecological cycles of air, soil and water It is today recognized for its intrinsic value and for the functions it provides in ecosystems. The grassland and the hedges that surround them play a key role in carbon storage, water purification, biodiversity and the typicity of landscapes. They partly provide the plants necessary for feeding herds of herbivores (cattle, …
Water Efficiency & Sustainability In The Mountain West, 2022, Zachary Billot, Caitlin J. Saladino, William E. Brown Jr.
Water Efficiency & Sustainability In The Mountain West, 2022, Zachary Billot, Caitlin J. Saladino, William E. Brown Jr.
Environment
This fact sheet analyzes the effectiveness of state-level policies related to water usage, conservation, and sustainability for the Mountain West states of Arizona, Colorado, Nevada, New Mexico, and Utah in 2022. The original data are published in the “2022 State Policy Scorecard for Water Efficiency and Sustainability” report written by the Alliance for Water Efficiency.
Silvopastoral Systems: Analyses Of An Alternative To Open Swards, James H. Mcadam, M. R. Mosquera-Losada, V. Papanastasis, Andrea Pardini, M. L. Rigueiro-Rodríguez
Silvopastoral Systems: Analyses Of An Alternative To Open Swards, James H. Mcadam, M. R. Mosquera-Losada, V. Papanastasis, Andrea Pardini, M. L. Rigueiro-Rodríguez
IGC Proceedings (1997-2023)
Silvopasture is a sustainable land use management practiced in most continents in the world including parts of southern Europe, but is not broadly used in northern and western Europe. The importance of this practice has been recognised and the last draft of the EU regulation by the European Agricultural Fund for Rural Development (http://europa.eu.int/comm/agriculture/capreform/rurdevprop_en.pdf) includes specifically funding for establishment of agroforestry practices in Europe. This paper discusses the advantages of managing semi intensive grassland within a silvopastoral system from an ecological, productive and social point of view in the south, south-central and western countries of Europe.
New Zealand Pastoral Systems: A Current Perspective, F. R. Duder, R. B. Green, W. D. Catto, D. R. Woodfield, B. R. Guy
New Zealand Pastoral Systems: A Current Perspective, F. R. Duder, R. B. Green, W. D. Catto, D. R. Woodfield, B. R. Guy
IGC Proceedings (1997-2023)
New Zealand's diverse grassland resource of 13.5 M ha of permanent pasture, tussock or alpine grasslands underpin an intensive pastoral industry worth NZ$13 billion in 2004. The pastoral industry involves 37,000 farmers and a service industry of about 215,000 persons. It produces 27 M prime export lambs and 180,000 t of predominantly crossbred wool from 40 M ewes; 13 B litres of milk from 5.2 M dairy cattle; 800,000 t of beef from 4.7 M beef cattle and 33,000 t of venison from 2 M deer. Pastures and forage crops, mostly non- irrigated, are grazed 'in situ' by animals through …
Assessment And Monitoring Of Grazing Lands In The Northeastern United States, M. A. Sanderson, Sarah C. Goslee, J. B. Cropper, R. B. Bryant
Assessment And Monitoring Of Grazing Lands In The Northeastern United States, M. A. Sanderson, Sarah C. Goslee, J. B. Cropper, R. B. Bryant
IGC Proceedings (1997-2023)
The Pasture Condition Score System (Cosgrove et al., 2001) was developed as a monitoring and management tool on grazing lands The system considers 10 indicators of soils, plants, and animals including percent desirable plants, plant cover, plant diversity, plant residue, plant vigor, percent legume, uniformity of use, livestock concentration areas, soil compaction, and soil erosion. The indicators are assigned a score according to detailed criteria and the scores are summed to give an overall score for a pasture, or relevant grazing unit. The score is then interpreted, indicating if some type of management change or treatment is necessary. We …
Evaluating The Economic And Environmental Sustainability Of Integrated Farming Systems, C. A. Rotz, M. A. Sanderson, M. Wachendorf, F. Taube
Evaluating The Economic And Environmental Sustainability Of Integrated Farming Systems, C. A. Rotz, M. A. Sanderson, M. Wachendorf, F. Taube
IGC Proceedings (1997-2023)
Economic and environmental sustainability has become a major concern for forage-based animal production in Europe, North America and other parts of the world. Development of more sustainable farming systems requires an assimilation of experimental and modelling research. Field research is critical for supporting the development and evaluation of models, and modelling is needed to integrate farm components for predicting the long-term effects and interactions resulting from farm management changes. Experimentally supported simulation provides a tool for evaluating and comparing farming strategies and predicting their effect on the watershed, region and beyond.
New Approaches To Clover Breeding, M. T. Abberton, T. A. Williams, T. P. T. Michaelson-Yeates, A. H. Marshall, C. Jones, E. Sizer-Coverdale, R. P. Collins
New Approaches To Clover Breeding, M. T. Abberton, T. A. Williams, T. P. T. Michaelson-Yeates, A. H. Marshall, C. Jones, E. Sizer-Coverdale, R. P. Collins
IGC Proceedings (1997-2023)
White clover (Trifolium repens L.) and red clover (T. pratense) are the major forage legumes of temperate pastures. Breeding efforts have focused on overcoming the constraints to productivity and reliability in this species and thereby optimising their contribution to mixed swards. In recent years there has been an increased emphasis on livestock production and the efficient utilisation of forage material in the rumen. In this paper we report on a shift in the aims of forage legume breeding at IGER, building on a strong agronomic platform but giving greater consideration to the environmental footprint of our varieties …
Environmental Clustering Of New Zealand Dairy Herds, J. R. Bryant, N. López-Villalobos, J. E. Pryce, C. W. Holmes
Environmental Clustering Of New Zealand Dairy Herds, J. R. Bryant, N. López-Villalobos, J. E. Pryce, C. W. Holmes
IGC Proceedings (1997-2023)
Previous studies have found that milk yield (a proxy for feeding level) and temperature-humidity index (THI) are important factors in explaining genotype x environment (G x E) interactions, indicating differences between the abilities of genotypes to forage or consume concentrates effectively or to cope with thermal stress (Ravagnolo and Misztal, 2000; Zwald et al., 2003). The objective of this study was to quantify and cluster (CL) herd environments within New Zealand (NZ) based on production levels, a summer heat load index (HLI) and geographical location.
Challenges And Opportunities For Animal Production From Temperate Pastures, D. A. Clark
Challenges And Opportunities For Animal Production From Temperate Pastures, D. A. Clark
IGC Proceedings (1997-2023)
Key points
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Temperate pastures offer a major opportunity to reduce the feed costs associated with ruminant production.
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Pastures offer unique opportunities for producing high value components in feedstuffs that are beneficial to human health.
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The increased use of pasture will not automatically lead to improved environmental outcomes – difficult challenges exist in reducing nitrogen and greenhouse gas pollution.
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Grazed pasture systems offer advantages in animal welfare, provided management avoids the problems associated with climatic extremes, and the toxins associated with some pastures.
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To remain competitive with total mixed ration systems, and environmentally acceptable, pastures with higher intake characteristics that allow …
New Insights Into The Nutritional Value Of Grass, D. H. Rearte
New Insights Into The Nutritional Value Of Grass, D. H. Rearte
IGC Proceedings (1997-2023)
Key points
- The rumen environment in cattle grazing high quality forage is different to that reported for cattle fed indoors with diets based on processed feedstuffs.
- Temperate pasture is an excellent source of nutrients for ruminants but a high energy:protein imbalance can occur when it is offered at the stage of optimal digestion.
- Beef and milk produced on grass in temperate regions have a composition with nutritional advantages over beef or milk produced in indoor systems based on concentrate.
- Increasing water soluble carbohydrate content of grasses would diminish environmental contamination by reducing the excretion of urea through the urine.
- Increasing …
Identifying Factors To Develop And Validate A Heat Vulnerability Tool For Pakistan – A Review, Salman Muhammad Soomar, Sarmad Muhammad Soomar
Identifying Factors To Develop And Validate A Heat Vulnerability Tool For Pakistan – A Review, Salman Muhammad Soomar, Sarmad Muhammad Soomar
Department of Emergency Medicine
Objective: This review will provide better insight into developing and validating a heat vulnerability assessment tool for Pakistan.
Methods: A literature search was done to identify studies onon heat vulnerability assessment published from January 2012 to January 2021 (10 years). Online databases PubMed, Google Scholar, Scopus, and Web of science were used for the literature search.
Results: Heat vulnerability can be evaluated by some specific determinants that have heat-related health events, including social, economic, environmental, housing, and geographical factors.
Conclusion: This tool will identify heat vulnerability risks and mitigate morbidity and mortality.
Effects Of Salix Psammophila On Groundwater Recharge In A Semiarid Area Of North China, Lizhu Hou, Jingdong Gao, Bill X. Hu, Xixi Wang
Effects Of Salix Psammophila On Groundwater Recharge In A Semiarid Area Of North China, Lizhu Hou, Jingdong Gao, Bill X. Hu, Xixi Wang
Civil & Environmental Engineering Faculty Publications
Study region: The semiarid Mu Us Sandy Land (MUSL) was selected for this study. It is in the farming-pastoral ecotone of north China and functions as an eco-environmental barrier.
Study focus: Afforestation can mitigate desertification and soil erosion by improving hydrologic condition, which is particularly true for semiarid and arid regions. However, little is known about the quantitative response of hydrologic improvement to afforestation level that can be measured by leaf area index (LAI). The objective was to setup and use a physically-based model to quantitatively assess the dynamics of water fluxes from Salix psammophila afforestation in the MUSL.
New …
Exploring The Spatial Distribution Of Air Pollutants And Covid-19 Death Rate: A Case Study For Los Angeles County, California, Akhil Mandalapu, Junfeng Jiao, Amin Azimian
Exploring The Spatial Distribution Of Air Pollutants And Covid-19 Death Rate: A Case Study For Los Angeles County, California, Akhil Mandalapu, Junfeng Jiao, Amin Azimian
International Journal of Geospatial and Environmental Research
Objective
Since March 2020, COVID-19 has rapidly spread across the world with over 240 million cases and over 5 million deaths as of November 2021. It has been unclear what role air pollutants may play in exacerbating respiratory illnesses such as COVID-19 due to their interaction with the respiratory system. The association with air pollutants and COVID-19 severity has been explored at the regional and metropolitan area, however it is unclear if such an association is consistent at the neighborhood level.
Methods
Weekly death rates from COVID-19 from March 2020 to November 2021 were compared using one-sided unpaired t-tests across …
The Cleaned Approach For Flagging And Addressing Environmental Issues, A. Notenbaert, B. Paul, R. Van Der Hoek, J. Mukiri
The Cleaned Approach For Flagging And Addressing Environmental Issues, A. Notenbaert, B. Paul, R. Van Der Hoek, J. Mukiri
IGC Proceedings (1997-2023)
While livestock presents an important livelihood strategy for many smallholders, it is also held responsible for important environmental impacts. In this paper, we used an online survey to identify the perceptions of global livestock experts on environmental impacts of livestock and how these might be tackled. We then explored how the CLEANED environmental ex-ante assessment tool (Comprehensive Livestock Environmental Assessment for improved Nutrition, a secured Environment and sustainable Development = CLEANED) responds to this and how it can be used to influence decision making towards more environmentally-friendly livestock production.
According to the survey, there was general agreement between researchers, development …
Deforestation For Pasture Development – Has It Been Worth It?, W. H. Burrows
Deforestation For Pasture Development – Has It Been Worth It?, W. H. Burrows
IGC Proceedings (1997-2023)
Differing scenarios leading to deforestation for pasture development in savanna (woodland) and closed forest communities in the tropics – sub-tropics are compared and contrasted. Australian and Brazilian examples are highlighted. No simple answer is given to the question of whether deforestation for pasture development has been worth it, since both commercial and non-commercial values have equal validity and need to be taken into account. These issues are addressed in the context of land assigned by governments for agricultural purposes. It is concluded that technology and ecological understanding are now available to maintain sustainable production from converted forest systems. However emphasis …
A 60- Year Record Of The Demotechnic Index Of States, 1960-2019, Gavin James Kellough
A 60- Year Record Of The Demotechnic Index Of States, 1960-2019, Gavin James Kellough
Graduate Theses and Dissertations
A country’s dependency on energy resources can be interpreted through the calculation of energy indices. The Demotechnic Index (DI) was used to determine the trajectory of energy efficiency of each state in the United States over the period 1960-2019. The DI serves as a measure of the energy intensity of states and a proxy for energy sustainability of each state.The DI is the ratio of total energy use to total metabolic energy demand of a population. Mathematically, DI = (E_T-E_M)/E_M E_T represents the total energy used (metabolic energy + technological energy in kilojoules annually, kJ/y), while EM represents the basic …
Management Changes And Strategies To Improve The Environmental Services From Grasslands In Northern China And Mongolia, David R. Kemp, J. Addison, K. Behrendt, G. Udval, D. Lkhagvaa, Guodong Han, Zhiguo Li, P. Li
Management Changes And Strategies To Improve The Environmental Services From Grasslands In Northern China And Mongolia, David R. Kemp, J. Addison, K. Behrendt, G. Udval, D. Lkhagvaa, Guodong Han, Zhiguo Li, P. Li
IGC Proceedings (1997-2023)
The grasslands of Mongolia and northern China are part of the vast Eurasian grasslands that extend from east Asia to eastern Europe, with many common problems. Grassland degradation and herder livelihoods in the steppe regions of China and Mongolia are widely acknowledged as major issues that need to be improved. The core problem is too many animals are now grazing grasslands, initially driven by significant policy changes, and decisions that assumed more animals would lift herder incomes. Problems are accentuated by poorly defined property rights over the land. The effectiveness of current Government Programs aimed at reducing grazing pressures has …
Climatic Factors, Acid Detergent Fiber, Neutral Detergent Fiber And Crude Protein Contents In Digitgrass, C. S. Chen, S. M. Wang, Y. K. Chang
Climatic Factors, Acid Detergent Fiber, Neutral Detergent Fiber And Crude Protein Contents In Digitgrass, C. S. Chen, S. M. Wang, Y. K. Chang
IGC Proceedings (1997-2023)
Digitgrass (Digitaria Xumifolia) was treated according to a set of programmed harvest cycles to study the impact of climatic factors on the quality of the grass. It is found that seasonal changes have greater effect on the quality of the grass than does the length of the harvest cycle. The highest correlation coefficient (0.81) between the ADF content and accumulated temperature is attained when the base temperature is set to 15.5 , while the highest correlation coefficient (0.88) between CP and is attained at a base temperature of 15.0 . The determination coefficient of regression (R2 ) …
Geospatial Technology In Sustainable Cities And Communities: Introduction To The Special Issue, Siti Aekbal Salleh, Zulkiflee Abd Latif, Nazri Che Dom
Geospatial Technology In Sustainable Cities And Communities: Introduction To The Special Issue, Siti Aekbal Salleh, Zulkiflee Abd Latif, Nazri Che Dom
International Journal of Geospatial and Environmental Research
This special issue aims to demonstrate how we could leverage geospatial technology for sustainable cities and communities. Contributions on a wide range of geospatial technologies (e.g., GIS, remote sensing, spatial statistics, photogrammetry, and geomatics) as well as issues addressing better cities and communities for a sustainable future are encouraged. This issue contains selected papers from the 7th International Conference on Geomatics and Geospatial Technology (GGT) 2021, which took place in Kuala Lumpur, Malaysia, on 24th March 2021. The five articles selected for this special issue demonstrate how geospatial technology can be used to create more sustainable cities and communities. The …
Comparative Study Of Leachate Characterization: Implication For Sustainable Environmental Management, Osakpolor Marvellous Omorogieva, Victory Itua Igberase
Comparative Study Of Leachate Characterization: Implication For Sustainable Environmental Management, Osakpolor Marvellous Omorogieva, Victory Itua Igberase
School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations
Understanding the sources of environmental stressors, the role of geology, climate and technology would provide a guide to solving the problems posed by such stressor. The study examine the sources of wastes in Ikhueniro open dumpsite located in Benin city, Nigeria and characterize the leachate emanating from it. This will assist in adequate design of managerial scheme to tackle the menace posed by it while putting into consideration the role of geology, climate and technology. The key objectives are to carry out field study, characterize wastes in the dumpsite and collect raw leachate emanating from the wastes heap in order …
Grazing Practices And Rangeland Conservation: Towards Output‐Based Contracts To Improve Relevance And Enhance Technical Innovation, Cyril Agreil, Jocelyn Haskell, John Haskell, Michel Meuret, Fred Provenza
Grazing Practices And Rangeland Conservation: Towards Output‐Based Contracts To Improve Relevance And Enhance Technical Innovation, Cyril Agreil, Jocelyn Haskell, John Haskell, Michel Meuret, Fred Provenza
IGC Proceedings (1997-2023)
No abstract provided.
A Research Of The Living Environment In The Pasturing Area, Yajuan Guo, Yong Gao, Xu Sun
A Research Of The Living Environment In The Pasturing Area, Yajuan Guo, Yong Gao, Xu Sun
IGC Proceedings (1997-2023)
No abstract provided.
Diversity – Independent Factors Predict Elevated Extinction Rates, Dustin Perriguey
Diversity – Independent Factors Predict Elevated Extinction Rates, Dustin Perriguey
Earth and Planetary Sciences Faculty and Staff Publications
Multiple linear regression was used to determine the relationships between diversity-independent factors (i.e., abiotic, climatic) 2, 5, and 10 Myrs-prior to the most elevated Phanerozoic extinctions. We constructed five abiotic variables from Phanerozoic proxy records1–5 to compare to extinction rates: mean temperature, temperature instability, carbon cycle instability, continental weathering rates, and habitat instability. All three models were statistically significant (P < 0.05) and explained > 70% of the variation in Alroy’s6 three-timer generic extinction rates. However, the 2 Myr-prior model explained the most variance in extinction rates and had the most predictive power, based on adjusted and predictive R2 (~ 72% and 41%, respectively). Carbon …
Diversity – Independent Factors Predict Elevated Extinction Rates, Dustin Perriguey, Corinne Myers, Jason Moore, Louis Scuderi
Diversity – Independent Factors Predict Elevated Extinction Rates, Dustin Perriguey, Corinne Myers, Jason Moore, Louis Scuderi
Earth and Planetary Sciences ETDs
Multiple linear regression was used to determine the relationships between diversity-independent factors (i.e., abiotic, climatic) 2, 5, and 10 Myrs-prior to the most elevated Phanerozoic extinctions. We constructed five abiotic variables from Phanerozoic proxy records1–5 to compare to extinction rates: mean temperature, temperature instability, carbon cycle instability, continental weathering rates, and habitat instability. All three models were statistically significant (P < 0.05) and explained > 70% of the variation in Alroy’s6 three-timer generic extinction rates. However, the 2 Myr-prior model explained the most variance in extinction rates and had the most predictive power, based on adjusted and predictive R2 (~ 72% and 41%, respectively). Carbon …
Environmental Efficiency In Mixed Crop Livestock Farming In India, K. A. C. H. A. Kothalawala, S. Kumar, H. Kothalawala
Environmental Efficiency In Mixed Crop Livestock Farming In India, K. A. C. H. A. Kothalawala, S. Kumar, H. Kothalawala
IGC Proceedings (1997-2023)
No abstract provided.
Predicting College Students’ Future Intentions To Engage In Public-Sphere Water Conservation Behaviors, Austin Wise, Donald Johnson, George Wardlow, Kathi Jogan
Predicting College Students’ Future Intentions To Engage In Public-Sphere Water Conservation Behaviors, Austin Wise, Donald Johnson, George Wardlow, Kathi Jogan
Department of Earth and Atmospheric Sciences: Faculty Publications
The purpose of this study was to describe selected college students’ (N = 252) perceptions of and future intentions (FI) to engage in public-sphere water conservation behaviors, and to determine if FI could be predicted by a single or linear combination of student demographic characteristics and latent variables. A majority of respondents agreed a growing population will negatively affect water quantity (90.5%) and there is a need for water resource management (85.6%). A majority disagreed or strongly disagreed that they (53.4%), their family (57.1%), or their friends (67.5%) practiced water conservation, or that people in their hometowns were concerned about …
Investigation Of Defective Trees Using Electric Resistivity Method, Turgay İşseven, Yi̇ği̇t Yilmaz, Nedi̇m Gökhan Aydin
Investigation Of Defective Trees Using Electric Resistivity Method, Turgay İşseven, Yi̇ği̇t Yilmaz, Nedi̇m Gökhan Aydin
Turkish Journal of Earth Sciences
The resistivity method in geophysics is used to solve various geological and engineering problems. Recently, this nondestructive method has been used on trees to investigate possible infections within the trunks by scanning resistivity variations. In this study, the electrical resistivity method has been aimed to be applied on various trees in Istanbul, Turkey to test whether the method applies to trees via regular resistivity measurement devices used in geophysics. Firstly, a multi-channel resistivity device, that is designed to automatically take measurements on the ground, is modified to carry out the measurements on trees. The measured data are processed using two …
Answers In The East: An Examination Of China's Renewable Energy And Its Application To Central Appalachia, Lillian Hamm
Answers In The East: An Examination Of China's Renewable Energy And Its Application To Central Appalachia, Lillian Hamm
Mahurin Honors College Capstone Experience/Thesis Projects
While much of China’s electrification has depended on coal, recent decades illustrate the country is heavily investing in and implementing renewable energy as a power source. Even China’s coal-rich provinces, like the northeastern province of Shanxi, have been making the transition to renewable energy. The central Appalachian states comprised of eastern Kentucky, West Virginia, western Virginia, and northeastern Tennessee share many characteristics with China’s Shanxi province including economic resources, climate, and geography. Yet, central Appalachia has not been able to easily transition to renewable energy. However, there are various cultural, political, and technological differences between the two regions to explain …