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Full-Text Articles in Entire DC Network
Exploring The Principle And Method For Commingled Production Of Coal-Measure Gas Through Layered Pressure Relief In Surface Wells, Li Rui, Jin Lihong, Xia Binwei, Ge Zhaolong
Exploring The Principle And Method For Commingled Production Of Coal-Measure Gas Through Layered Pressure Relief In Surface Wells, Li Rui, Jin Lihong, Xia Binwei, Ge Zhaolong
Coal Geology & Exploration
This study aims to gain an in-depth understanding of factors restricting the commingled production of coal-measure gas and boost the contributions of various pay zones to gas production. To this end, it analyzed the essential factors of the dynamic, channel, and gas source conditions in the commingled production. The dynamic conditions for the commingled exploitation of multiple reservoirs can be met by (1) enhancing the flow conductivity of reservoirs by altering the crustal stress state and (2) changing reservoir fluid pressure by layers. Following this principle, this study proposed a method for the commingled production of coal-measure gas through layered …
Underground Coal Gasification: Overview Of Field Tests And Suggestions For Industrialization, Dong Zhen, Chen Yanpeng, Kong Lingfeng, Wang Feng, Chen Hao, Xue Junjie, Zhang Mengyuan, Chen Shanshan, Zhao Yufeng, Yu Yueyu, Gong Wanxing, Sun Hongliang, Wang Xinggang
Underground Coal Gasification: Overview Of Field Tests And Suggestions For Industrialization, Dong Zhen, Chen Yanpeng, Kong Lingfeng, Wang Feng, Chen Hao, Xue Junjie, Zhang Mengyuan, Chen Shanshan, Zhao Yufeng, Yu Yueyu, Gong Wanxing, Sun Hongliang, Wang Xinggang
Coal Geology & Exploration
Driven by the dual demands for achieving the goals of peak carbon dioxide emissions and carbon neutrality and for ensuring national energy security, underground coal gasification (UCG) in China is embracing a new historical development opportunity. To scientifically formulate a route for making technological breakthroughs in UCG and accelerate its industrialization, this study analyzed the history of UCG field tests, dividing UCG into three stages: UCG based on coal mines, vertical/directional wells, and horizontal wells. By exploring the underlying logic that propelled innovations in UCG technologies in different stages, this study delved into the technical and non-technical reasons for the …
Deep Coal Reservoirs In The Ningwu Basin: Geothermal Field Characteristics And Their Effects On Gas-Bearing Properties, Xi Zhaodong, Tang Shuheng, Liu Zhong, Qu Xiaorong, Zhang Pengbao, Su Yufei, Zhang Qian
Deep Coal Reservoirs In The Ningwu Basin: Geothermal Field Characteristics And Their Effects On Gas-Bearing Properties, Xi Zhaodong, Tang Shuheng, Liu Zhong, Qu Xiaorong, Zhang Pengbao, Su Yufei, Zhang Qian
Coal Geology & Exploration
Temperature acts as an important factor affecting the gas-bearing properties of deep coal reservoirs, further affecting the development performance of deep coalbed methane (CBM). Therefore, ascertaining the geothermal conditions of coal reservoirs and their effects on the gas-bearing properties of deep coal reservoirs is critical to the systemic understanding of the enrichment characteristics and production patterns of deep CBM. For coal seam No.9 in the Taiyuan Formation within the Ningwu Basin, over 90% of the area has burial depths exceeding 1000 m. In the hinterland of the basin, coal seams generally exhibit burial depths greater than 1500 m, with a …
Enrichment And Accumulation Patterns And Favorable Area Evaluation Of Deep Coalbed Methane In The Fugu Area, Ordos Basin, Guo Guangshan, Xu Fengyin, Liu Lifang, Cai Yidong, Qin Wei, Chen Zhaohui, Deng Jimei, Li Zhuolun
Enrichment And Accumulation Patterns And Favorable Area Evaluation Of Deep Coalbed Methane In The Fugu Area, Ordos Basin, Guo Guangshan, Xu Fengyin, Liu Lifang, Cai Yidong, Qin Wei, Chen Zhaohui, Deng Jimei, Li Zhuolun
Coal Geology & Exploration
The Shenfu block on the eastern margin of the Ordos Basin is a typical deep coalbed methane (CBM) field with abundant resources and considerable potential for exploration and exploitation. In October 2023, the large-scale Shenfu deep CBM field successfully reported proven geological reserves exceeding 110 billion m3. The Fugu area, located in the central part of the Shenfu block, is the earliest experimental area for deep CBM production. However, there is a lack of a clear understanding of CBM enrichment and accumulation patterns, as well as the potential for exploration and development, of this area. By comprehensively utilizing …
Exploration And Exploitation Of Deep Coalbed Methane In The Baijiahai Uplift, Junggar Basin: Progress And Its Implications, Lan Hao, Yang Zhaobiao, Chou Peng, Wang Bin, Liu Changqing, Liang Yuhui, Wang Yuqiang
Exploration And Exploitation Of Deep Coalbed Methane In The Baijiahai Uplift, Junggar Basin: Progress And Its Implications, Lan Hao, Yang Zhaobiao, Chou Peng, Wang Bin, Liu Changqing, Liang Yuhui, Wang Yuqiang
Coal Geology & Exploration
The Jurassic coals in the Baijiahai uplift, with breakthroughs made in the deep coalbed methane (CBM) production of vertical wells in the early stage in China, serve as an important exploration target of the Junggar Basin. Their coal reservoirs feature an ultra-low ash content, a low moisture content, medium-to-high volatility, and favorable porosity and permeability systems. With gas accumulation modes, namely, the paleo-source and young-reservoir made and the self-source and self-reservoir mode, the coal seams enjoy favorable gas-bearing properties, such as a high gas content, a high proportion of free gas, and high gas saturation, which establish them as high-quality …
Origin And Accumulation Mechanisms Of Coalbed Methane In Low-Rank Coals In Gas-Rich Sags In The Erlian Basin, Lin Haitao, Li Ling, Tang Shuling, Tian Wenguang, Li Jie, Meng Qin
Origin And Accumulation Mechanisms Of Coalbed Methane In Low-Rank Coals In Gas-Rich Sags In The Erlian Basin, Lin Haitao, Li Ling, Tang Shuling, Tian Wenguang, Li Jie, Meng Qin
Coal Geology & Exploration
Inner Mongolia boasts abundant coalbed methane (CBM) resources in low-rank coals. Investigating the origin and accumulation mechanisms of CBM is crucial for the siting and assessment of these CBM resources. This study examined the CBM in low-rank coals in major gas-rich sags of the Erlian Basin through various experiments, including tests of the composition and carbon/hydrogen isotopes of CBM, as well as tests of the water quality, hydrogen/oxygen isotopes, and radioisotopes (3H and 14C) of coal seam water. By analyzing the geochemical characteristics of both CBM and coal seam water, this study revealed the origin, sources, and …
Outcomes And Implications Of Pilot Tests For Deep Coalbed Methane Production On The Eastern Margin Of The Ordos Basin, Nie Zhihong, Xu Fengyin, Shi Xiaosong, Xiong Xianyue, Song Wei, Zhang Lei, Liu Ying, Sun Wei, Feng Yanqing, Liu Shirui, Yan Xia, Sun Xiaoyi, Wu Mansheng
Outcomes And Implications Of Pilot Tests For Deep Coalbed Methane Production On The Eastern Margin Of The Ordos Basin, Nie Zhihong, Xu Fengyin, Shi Xiaosong, Xiong Xianyue, Song Wei, Zhang Lei, Liu Ying, Sun Wei, Feng Yanqing, Liu Shirui, Yan Xia, Sun Xiaoyi, Wu Mansheng
Coal Geology & Exploration
Breakthroughs in the exploration and production of deep coalbed methane (CBM) in the Daning-Jixian block on the eastern margin of the Ordos Basin exert a profound influence on the CBM industry, arousing extensive concern and follow-up. Although previous studies delved into the theoretical and technical challenges and corresponding solutions of deep CBM exploration and production, there is a lack a systematic summary of pilot tests for typical gas field exploitation. Through an in-depth dissection of the geological characteristics and challenges of cost-effective production of deep CBM, this study summarized the advances and outcomes of the pilot test projects in the …
Multi-Round Diverting Fracturing Technology And Its Application In Deep Coalbed Methane In The Daning-Jixian Block, Xiong Xianyue, Zhen Huaibin, Li Shuguang, Wang Hongna, Zhang Lei, Song Wei, Lin Hai, Xu Fengyin, Li Zhongbai, Zhu Weiping, Wang Chengwang, Chen Gaojie
Multi-Round Diverting Fracturing Technology And Its Application In Deep Coalbed Methane In The Daning-Jixian Block, Xiong Xianyue, Zhen Huaibin, Li Shuguang, Wang Hongna, Zhang Lei, Song Wei, Lin Hai, Xu Fengyin, Li Zhongbai, Zhu Weiping, Wang Chengwang, Chen Gaojie
Coal Geology & Exploration
The Daning-Jixian block on the eastern margin of the Ordos Basin exhibits high-abundance deep coalbed methane (CBM) resources, well-developed natural fractures of coal reservoirs, well-developed cleats and fractures in coals themselves, coals with excellent structures and high mechanical strength, and strong sealing ability of coal roofs and floors. All these create favorable conditions for the formation of a large-scale fracture network through volume fracturing. The ultra-large-scale fracturing process has contributed to a major breakthrough in the single-well output of deep CBM. However, the tracer monitoring results show that various fracturing stages of horizontal wells exhibited different contribution rates to gas …
Soil Nitrification Inhibition With Plantain (Plantago Lanceolata), M. E. Peterson, P. M. Fraser, C. R. Anderson, N. I. Joyce, H. G. Judson
Soil Nitrification Inhibition With Plantain (Plantago Lanceolata), M. E. Peterson, P. M. Fraser, C. R. Anderson, N. I. Joyce, H. G. Judson
IGC Proceedings (1977-2023)
One strategy to reduce nitrogen losses from intensively grazed forage systems is to slow the first stage of soil nitrification, specifically inhibiting the microbial oxidation of ammonium to nitrite. Plantain (Plantago lanceolata) leaves and roots are known to contain several bioactive compounds (e.g., aucubin, catalpol and verbascoside) that may contribute to this inhibition. Recent laboratory studies indicate that this inhibition occurs via consumption by grazing animals of precursor bioactive compounds in aboveground biomass and their subsequent excretion as secondary metabolites in urine and/or via active exudation from the roots. Different cultivars of plantain have been shown to impart …
Forage Genomics Accelerate The Germplasm Resource Innovation, Fan Wu, Qi Yan, Pan Xu, Zhen Duan, Jiyu Zhang
Forage Genomics Accelerate The Germplasm Resource Innovation, Fan Wu, Qi Yan, Pan Xu, Zhen Duan, Jiyu Zhang
IGC Proceedings (1977-2023)
To achieve sustainability and food security we need expand the germplasm base and access novel genetic diversity to accelerate breeding. For developing new forage cultivars, the availability of a high-quality genome facilitates accurate characterization of new germplasm, and an understanding of the genetics underlying important traits. Here, we sequenced and assembled three high-quality chromosome-level forage genomes. The contig-level assembly of Cleistogenes songorica (2n = 4x = 40) comprised 540.12 Mb of the genome, with a contig N50 of 21.28 Mb. Complete assemblies of all telomeres, and of ten chromosomes were derived. The chromosome-scale genome size of elephant grass (2n = …
Theory And Application Of No-Till Reseeding Technology In Degraded Grasslands In China, Jingying Jing, Hongyan Ma, Yingjun Zhang
Theory And Application Of No-Till Reseeding Technology In Degraded Grasslands In China, Jingying Jing, Hongyan Ma, Yingjun Zhang
IGC Proceedings (1977-2023)
Grasslands occupy nearly 400 million hectares in China, accounting for about 40.7% of the total land area, provide multiple ecological and economic benefits. However, due to over-grazing and over-cultivation, more than 90% grasslands in China are threatened by degradation that has caused significant negative impact on biodiversity and ecosystem functioning, such as biodiversity losses, decreased productivity, increased soil erosion etc. Thus, restoration of degraded grassland is urgent for sustainable grassland management in China. No-till reseeding has been found to be an effective way for grassland vegetation regeneration with improved productivity and increased plant diversity via reseeding suitable species with minimum …
Rangeland-Centered Agroecosystems In Indian Central Himalayas: Operationalizing Ecological Sustainability In Mountain Agriculture, Vir Singh
IGC Proceedings (1977-2023)
Himalayan Mountains are home to unique agroecosystems harboring unique inter- and intra-species diversity in uncultivated and cultivated lands. The uncultivated lands are largely the rangelands which are ecologically more stable ecosystems than the cultivated lands which are ecologically prone areas. Rangelands, cultivated areas, and livestock in mountain agriculture are in organic linkages with each other, woven into a complex unitary whole, functionally oriented to produce foods and other life-supporting products – such as feed, fiber, fuel, fertilizers, etc. – and provide vital ecological functions. Rangelands in fragile Himalayan mountains serve as a key component of agriculture and the biodiversity conserved …
Mentoring Graduate Students For Academic Careers In Grassland Science, L. E. Sollenberger
Mentoring Graduate Students For Academic Careers In Grassland Science, L. E. Sollenberger
IGC Proceedings (1977-2023)
Effective mentorship enhances student productivity and career achievements, yet faculty generally do not receive mentorship training, nor does mentorship receive focused attention, evaluation, and recognition. The objectives of this paper are to 1) define mentorship and identify roles of a mentor, 2) highlight qualities and outcomes of effective mentoring, and 3) elaborate best mentoring practices, metrics for assessing mentoring, and challenges for mentoring the next generation of grassland scientists. Mentoring is a professional alliance where individuals work together to support the personal and professional growth, development, and success of the relational partners. Mentors should be altruistic discipline experts, have substantial …
National Forage Week, B. Stefancik, K. Mullenix
National Forage Week, B. Stefancik, K. Mullenix
IGC Proceedings (1977-2023)
Social media can be a powerful tool for producers, researchers, and grassland professionals. Social media enables us to connect with a wide audience of producers, Extension personnel, colleagues, industry partners, and even the non-agriculture related community. This presentation in the thematic session on “Understanding the role of social media and digital resources in forage education and promotion” will focus on the impact of National Forage Week. National Forage Week is national campaign initiated by the American Forage and Grassland Council to promote forages and their contributions to society.
Maize-Alfalfa Intercropping Promote Ecosystem Services Than Fertilized Single Crops, D. X. Tao, Y. Z. Gao
Maize-Alfalfa Intercropping Promote Ecosystem Services Than Fertilized Single Crops, D. X. Tao, Y. Z. Gao
IGC Proceedings (1977-2023)
Phosphorus is a non-renewable source of fertilization, which will challenge the future of food production and cropland sustainability worldwide. Crop diversity is known to promote food production, yet its capacity to alleviate the dependence of multiple ecosystem services on non-renewable fertilization remains virtually unknown. Here, we conducted a field experiment to quantify the contribution of maize-alfalfa intercropping to support multiple ecosystem services under contrasting levels of phosphorus fertilization. We showed that unfertilized intercropping systems can support larger levels of multiple ecosystem services such as soil microbial habitat, plant-soil mutualism, nutrient cycling, and soil carbon storage compared with phosphorus-fertilized single crops. …
Identification Of Hyperspectral Characteristics Of The Main Plants In Seriphidium Transiliense Desert Grassland, Wenhao Liu, Wanqiang Han, Guili Jin, Ying Li, Ke Gong, Jian Ma, Zhibiao Liu, Jiazin Li, Mengtian Chen
Identification Of Hyperspectral Characteristics Of The Main Plants In Seriphidium Transiliense Desert Grassland, Wenhao Liu, Wanqiang Han, Guili Jin, Ying Li, Ke Gong, Jian Ma, Zhibiao Liu, Jiazin Li, Mengtian Chen
IGC Proceedings (1977-2023)
Ground hyperspectral images of sericite–Artemisia desert grassland in different seasons were obtained by a soc710 VP imaging spectrometer. Analysis of variance was used to extract the main species Seriphidium transiliense, Ceratocarpus arenarius, and Petrosimonia sibirica and the spectral characteristic parameters and vegetation indices of bare land in different seasons. On this basis, Fisher discriminant analysis was used to divide the samples into a training set and test set according to a ratio of 7:3. The spectral characteristic parameters and vegetation indices were used to identify the three main plants and bare land. Results showed that under Fisher discriminant analysis, …
A Transdisciplinary Approach To Landscape Transformation Towards Perennial, Diverse, Circular Systems: Why And How, V. Picasso, C. Williams
A Transdisciplinary Approach To Landscape Transformation Towards Perennial, Diverse, Circular Systems: Why And How, V. Picasso, C. Williams
IGC Proceedings (1977-2023)
Prevailing agricultural systems in the U.S. are dominated by intensification through annual crop monocultures and high amounts of external inputs. Increased yields per unit of land have resulted but many undesirable environmental, ecological, and socioeconomic outcomes have co-occurred. Lack of resilience within intensified agricultural systems is a factor in these outcomes. Redesign of agricultural systems and changes in federal policy are needed to better support resilience in agriculture. Redesign for greater resilience must encourage adoption of agricultural systems that are diverse, perennial, circular, and include forages. We developed a transdisciplinary framework within a project orientation with a focus on crops …
Breeding Cool-Season Forage Grasses For A Warming Climate, D. P. Malinowski, J. Ford, A. Stewart, D. Woodfield, W. E. Pinchak
Breeding Cool-Season Forage Grasses For A Warming Climate, D. P. Malinowski, J. Ford, A. Stewart, D. Woodfield, W. E. Pinchak
IGC Proceedings (1977-2023)
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
Invasive Annual Grass Issues In Canadian Rangelands, V. Maloney
IGC Proceedings (1977-2023)
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
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 (1977-2023)
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
Tennessee Master Beef Producer Program Promotes Sustainable Beef Production, K. M. Mason, G. E. Bates, J. D. Rhinehart
IGC Proceedings (1977-2023)
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
Guidelines For Optimal Use Of Near Infrared Spectroscopy (Nirs) With Sample Preparation And Presentation Across Instrument Platforms, D. W. Mcintosh
IGC Proceedings (1977-2023)
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
Challenges And Opportunities For Revegetation In Areas Dominated By Invasive Annual Grasses, B. A. Mealor, J. A. Crose
IGC Proceedings (1977-2023)
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
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 (1977-2023)
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
Observing And Simulating Temperate Grasslands In Central Europe, C. Nendel
IGC Proceedings (1977-2023)
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
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 (1977-2023)
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
Participatory Evaluation Of Urochloa (Brachiaria) Grasses In The Cool Highlands Of Central Kenya, Elkana Nyambati, W. Ayako, S. K. Mailu
IGC Proceedings (1977-2023)
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
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 (1977-2023)
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
Sunn Hemp As An Alternative Forage In The Texas High Plains Region, S. A. O’Shaughnessy, H. M. Mosqueda, D. K. Brauer
IGC Proceedings (1977-2023)
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
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 (1977-2023)
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 …