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Articles 2971 - 3000 of 42667
Full-Text Articles in Entire DC Network
Climate Change: Adapting Tropical And Subtropical Grasslands, G M. Mckeon, S M. Howden, N.O J. Abel, J M. King
Climate Change: Adapting Tropical And Subtropical Grasslands, G M. Mckeon, S M. Howden, N.O J. Abel, J M. King
IGC Proceedings (1977-2023)
Climate change as a result of increasing greenhouse gas concentrations or lhe repetition of historical climale variability will affect the management and production of tropical and subtropical grasslands that support about half the world's domestic herbivores. Previous studies of the regional impact of climate change and climate variability on intensive agriculture have shown lhat such evaluation should include the known and expected abilities of managers and governments to respond by reducing the negative impacts and taking advantage of positive opportunities, A high priority for grassland scientists is the development of similar evaluation capabilities for grassland systems, which are more complex …
Methane Production By New Zealand Ruminants, K Betteridge, M J. Ulyatt, J Knapp, R L. Baldwin
Methane Production By New Zealand Ruminants, K Betteridge, M J. Ulyatt, J Knapp, R L. Baldwin
IGC Proceedings (1977-2023)
Methane production by ruminants in New Zealand was estimated using a ma1hema1ical model of rumen digestion interfaced with census livestock numbers. New Zealand was divided into 4 climatic regions with each classified into improved, unimproved and tussock grasslands, and livestock were allocated to each class at appropriate stocking rates. Models of changing livestock numbers within n year were developed for each animal and land class. Food dry matter intake for each class of livestock was calculated from estimates of feed requirements and diet quality. Total methane production was estimated to be 1.50 Tg per year: 58.4% sheep, 20.7%, beef cattle, …
Nitrous Oxide Emissions From Grassland In Manawatu, New Zealand, R A. Carran, J P. Evans
Nitrous Oxide Emissions From Grassland In Manawatu, New Zealand, R A. Carran, J P. Evans
IGC Proceedings (1977-2023)
Nitrous oxide (Np) is a minor component of the atmosphere which acts as a potent greenhouse gas and also causes ozone depletion. Soil bacteria are the most important agents of N2O production, but both the New Zealand and the international data on N2O emission rates from soils are very poor at present. In order to help define the possible range of emission ranges from pasture soils· we selected sites with characteristics that would make then "high" or "low" emitters of N2O. The "high" emission site was a fine-textured, fertile but poorly drained flood plain soil. The "low" emission site was …
Development Of Plants Resistant To Insect Pests Using Gene Manipulation, D.W R. White, D R. Biggs, M T. Mcmanus, C R. Voisey, J T. Christeller, A H. Broadwell, E.P J. Burgess, C N. Chilcott, P J. Wigley, P G. Mcgregor
Development Of Plants Resistant To Insect Pests Using Gene Manipulation, D.W R. White, D R. Biggs, M T. Mcmanus, C R. Voisey, J T. Christeller, A H. Broadwell, E.P J. Burgess, C N. Chilcott, P J. Wigley, P G. Mcgregor
IGC Proceedings (1977-2023)
Damage to pasture plants caused by insect pests reduces the supply of feed for grassland animal production. In addition, the use of chemical insecticides for the control of pasture pests is undesirable for reasons of high cost and possible damage to the environment. One way to overcome these limitations is 10 utilize a recent development. in plant molecular biology which has seen the incorporation of cloned genes that confer insect _pest resistance into crop plants. To date, the most widely used genes for this purpose are those coding for insecticidal proteins from the bacterium Bacillus thuringiensis, and for inhibitors …
Implications Of A Doubling In Ambient Carbon Dioxide Levels Of Herbage Quality In Perennial Ryegrass And White Clover, H Clark, C C. Bell, P.C D. Newton, B D. Campbell
Implications Of A Doubling In Ambient Carbon Dioxide Levels Of Herbage Quality In Perennial Ryegrass And White Clover, H Clark, C C. Bell, P.C D. Newton, B D. Campbell
IGC Proceedings (1977-2023)
Digestibility (DMD) and crude protein (CP) percentage in leaf and stem of 4 cultivars each of perennial ryegrass (Lolium perenne) and white clover (Trifolium repens) grown at 3 day/night temperatures (12f7, 18/ 13, 28/23°C) and 2 CO2 concentrations (35 0 or 700 ppm) was estimated using near infrared reflectance spectroscopy (N[RS). Differences between cultivars in DMD and CP were small and non-significant. Higher temperatures reduced DMD andCP in both species. DMD was unaffected by CO2 concentration in either species. The higher concentration of CO2 reduced leaf and stem CP by 14.6 and 10% respectively in white clover …
Volatile Constituents Of Tall Fescue Varieties In Relation To Palatability, Aldo Tava, Nicola Berardo, Miriam Odoardi
Volatile Constituents Of Tall Fescue Varieties In Relation To Palatability, Aldo Tava, Nicola Berardo, Miriam Odoardi
IGC Proceedings (1977-2023)
The chemical composition of the essential oil of tall fescue (Festuca arundinacea Schreb,), a poorly palatable species, was analysed by GC and GC-MS. The major components identified were alcohols, aldehydes and esters. The qualitative and quantitative differences detected among 6 cultivars of different geographical origin suggest the most abundant compounds may play a role in the grazing preference exhibited by animals.
Partitioning Of Major Elements Concentrations In Grasses Into Four Cell Fractions Based On Enzymatic Solubility, Suguru Saiga, Takanori Akiyama, Moegi Saski, Kiyoshi Watanabe
Partitioning Of Major Elements Concentrations In Grasses Into Four Cell Fractions Based On Enzymatic Solubility, Suguru Saiga, Takanori Akiyama, Moegi Saski, Kiyoshi Watanabe
IGC Proceedings (1977-2023)
To investigate availability of major elements to animals, N, P, K, Ca and Mg of plant dry matter were partitioned into 4 cell fractions based on enzyme solubility. When the elemental concentration of forage was compared, Dactylis glomerata was higher in K (1.69%), Festuca aru11dinacea in N (2.35%), K (1.68%) and Mg (Q.341 %) and Lolimum perenne in N (2.54%), P (0.224%) and Ca (0.457%). When compared between plant parts, concentrations of all elements.were higher in leaf than in stem, especially P, Ca and Mg. As a result of partitioning, more than 85% of P, K and Mg resided …
Improvement Of The Feeding Value Of Senescent Grass Pastures By Molecular Genetic Manipulation, G D. Bonnett, K R. Stevenson, R J. Simpson
Improvement Of The Feeding Value Of Senescent Grass Pastures By Molecular Genetic Manipulation, G D. Bonnett, K R. Stevenson, R J. Simpson
IGC Proceedings (1977-2023)
Senescent grass pasture has low feeding value end is the major limitation to animal productivity during summer in annual environments. The loss of fructan from the stems of temperate grasses as they senesce contributes significantly to the decline in feeding value of the grass, Temporary retention of fructan during senescence achieved by treating grass with a herbicide increases both the feeding value of the grass and the productivity of animals grazing the modified pasture. We have identified an enzyme responsible for initiating the loss of fructan from stems of Lolium rigidum. It has been purified, characterized and will be used …
Modeling The Effects Of Climate Variability And Climate Change On A Pastoral Farming System, R J. Martin, D B. Baird, M J. Salinger, P R. Van Gardingen, D G. Mccall
Modeling The Effects Of Climate Variability And Climate Change On A Pastoral Farming System, R J. Martin, D B. Baird, M J. Salinger, P R. Van Gardingen, D G. Mccall
IGC Proceedings (1977-2023)
A simulation model was used to investigate the pasture and animal production and gross margins of a typical all sheep permanent pasture farm in South Canterbury, New Zealand, using 60 years of current climate data, and also a climate change scenario. The model was run on a fixed management system at different stocking rates with and without destocking during feed shortages. Mean annual pasture production was 8060 kg/ha, with a coefficient of variation of 22%. Destocking enabled more stock to be carried on average, with higher, but rh.ore variable, returns. A climate change scenario of a 75% increase in CO2' …
Effects Of Defoliation Height And Time Of Initital Defoliation On Regrowth Components In A Poa Pratensis- Dominated Sward, B E. Frankow-Lindberg
Effects Of Defoliation Height And Time Of Initital Defoliation On Regrowth Components In A Poa Pratensis- Dominated Sward, B E. Frankow-Lindberg
IGC Proceedings (1977-2023)
Two experiments on swards dominated by Poa pratensis L. were conducted in 2 climatically contrasting (wann/dry and cold/wet) years. There were either 4 or 3 initial defoliation dates in spring and 3 defoliation heights (2, 6 and 10 cm). Regrowths were harvested 4 weeks after the initial defoliation. The swards received a total of 80 kg/ha nitrogen split into 2 dressings. Regrowth characteristics, based on samples cut to ground level, depended on weather conditions. The yield of vegetative shoots was affected most by shoot size, which in turn was determined by initial defoliation date, in the dry year. In the …
Effect Of Management On Leaf Growth And Senescence Of Three Contrasting Grass Species, B M. Butler, J Hodgson
Effect Of Management On Leaf Growth And Senescence Of Three Contrasting Grass Species, B M. Butler, J Hodgson
IGC Proceedings (1977-2023)
The innuence of continuous grazing management on leaf extension, leaf senescence and tiller density of 3 grass species with contrasting tillering rates, tiller size and growth habit was examined. Perennial ryegrass (Lolium perenne L. cv. Grasslands Nui), tall fescue (Festuca arundinacea Schreb, cv. Grasslands Roa) and Yorkshire fog (Holc,,s la11allls L. cv. Massey Bnsyn) were maintained in as near a steady state as possible at sward heights of 3-10 cm. The balance between leaf extension and senescence, and tiller density resulted in net extension per unit area being generally greatest at sward heights of- 5.5 cm in Yorkshire fog and …
Applications Of Random Amplified Polymorphic Dna (Rapd) Markers In Plant Biology, Gail M. Timmerman, John A. Mccalum
Applications Of Random Amplified Polymorphic Dna (Rapd) Markers In Plant Biology, Gail M. Timmerman, John A. Mccalum
IGC Proceedings (1977-2023)
RAPDs are a new class of molecular marker based on PCR amplification of genomic DNA using random sequence primers. Their value for studying plant genomes has been clearly demonstrated in the short lime they have been in use. Uses of RAPD markers include genome mapping, lagging of genes, studying genetic diversity, identifying cultivars and analysing parentage. RAPDs should prove to be as applicable to the study of animal genomes ns they have for plant genomes, It is important that researchers using or planning to use this type of molecular marker be aware of two possible drawbacks of RAPDs. Since RAPDs …
A Traditional Exporter's Perspective Of Trade Reforms, N R. Mitchell
A Traditional Exporter's Perspective Of Trade Reforms, N R. Mitchell
IGC Proceedings (1977-2023)
The agriculture and trade policies which governments commonly have pursued over the last three decades, particularly governments in the large developed countries, have had a major impact on world patterns of production and trade in livestock and livestock products. This has been especially so for milk and dairy products where government involvement in markets has been most pervasive. One effect has been that the comparative advantages derived from the production of livestock products based on pasture feeding of animals \lave been suppressed or overridden. Reform of the international trading system for agricultural products now being developed in the GATT, and …
Impact Of Changing Trade Opportunities On Livestock Production In Developing Countries, J K. Camoens
Impact Of Changing Trade Opportunities On Livestock Production In Developing Countries, J K. Camoens
IGC Proceedings (1977-2023)
For the lesser developed countries (LDCs) and advanced countries (ACs), the paper identifies the determinants of "free" trade, analyses protectionism, examines the global trade picture with respect lo "free" trade, relates trade to production and the structure of demand, and finally predicts the impact of trade reforms. The analysis concludes that: (i) trade policies per se do not impact in any significant manner on domestic production or imports in the LDCs since world trade constitutes a small fraction of production; (ii) demand, and hence supply, of animal products are determined primarily by GNP, income distribution and price; (iii) grassland farming …
Development Of Grain-Saving, High Efficiency Pasture Animal Industry, Han Gui Qing
Development Of Grain-Saving, High Efficiency Pasture Animal Industry, Han Gui Qing
IGC Proceedings (1977-2023)
Grain-saving, high efficiency pasture-sustained (GSHEPS) animal industry, with its final purpose of profitable industry, is forage-orientated. This is a new fonn of operation based on advanced feeding management.
Practical Experience And Achievements In Sustainable Development Of World Network Of Biosphere Reserves, Weihua Xu, Zuchen Ma, Günter Köck, Wenlu Chen, Zhiyun Ouyang
Practical Experience And Achievements In Sustainable Development Of World Network Of Biosphere Reserves, Weihua Xu, Zuchen Ma, Günter Köck, Wenlu Chen, Zhiyun Ouyang
Bulletin of Chinese Academy of Sciences (Chinese Version)
As the core of the UNESCO “Man and the Biosphere Programme” (MAB), the World Network of Biosphere Reserves holds irreplaceable strategic value in harmonizing ecological conservation with regional sustainable development. Based on the four strategic objectives outlined in the Strategy for the Man and the Biosphere Programme (2015–2025), this study systematically analyzes the innovative practices across representative global reserves, revealing critical pathways and implementation outcomes for the sustainable development of biosphere reserves. The research demonstrates that the scientific conservation measures—including the establishment of biodiversity monitoring systems, systematic habitat restoration, and the development of genetic resource conservation networks—have significantly enhanced biodiversity …
Empowering Ecological Monitoring With Science And Technology, Driving Conservation And Development Through Innovation—A Case Study Of Wolong World Biosphere Reserve, Tingmei He, Shufeng Wang, Fan Wu, Yongfeng Wang
Empowering Ecological Monitoring With Science And Technology, Driving Conservation And Development Through Innovation—A Case Study Of Wolong World Biosphere Reserve, Tingmei He, Shufeng Wang, Fan Wu, Yongfeng Wang
Bulletin of Chinese Academy of Sciences (Chinese Version)
Ecological monitoring can provide basic data and decision-making support for ecological environment management and policy formulation. The technologies and methods adopted in ecological monitoring by the Wolong National Nature Reserve, located in Sichuan, China, hold extensive representativeness and influence on a global scale. Based on a review of the main monitoring practices of the Wolong World Biosphere Reserve, this paper presents the adoption of different technical paths and collaborative applications in the “sky-Earth-space integrated” monitoring, as well as the practices in promoting the “Five Ones” goals (i.e., one set of data, one platform, one set of algorithms, one cloud, and …
Transboundary Conservation Of Biosphere: Case Study From Xishuangbanna World Biosphere Reserve, Lin Wang, Lifan Wang, Xiaoyan Yi, Yun Yang, Ruichang Quan
Transboundary Conservation Of Biosphere: Case Study From Xishuangbanna World Biosphere Reserve, Lin Wang, Lifan Wang, Xiaoyan Yi, Yun Yang, Ruichang Quan
Bulletin of Chinese Academy of Sciences (Chinese Version)
Transboundary conservation, as a pivotal strategy in addressing the global biodiversity crisis, plays a critical role in maintaining ecological connectivity and promoting regional ecological security and sustainable development. Under the initiative of the Xishuangbanna World Biosphere Reserve and with bilateral governmental support from China and Laos, a contiguous transboundary protected area spanning approximately 220 km and encompassing 200 000 hectares was established along their shared border in 2012. This study elucidates the importance of transboundary conservation. Using the Xishuangbanna World Biosphere Reserve as a case study, the joint efforts between China and Laos are examined, and the effectiveness in the …
Designing A Haptic Boot For Space With Prompt Engineering: Process, Insights, And Implications, Mohammad Amin Kuhail, Jose Berengueres, Fatma Taher, Sana Khan, Ansah Siddiqui
Designing A Haptic Boot For Space With Prompt Engineering: Process, Insights, And Implications, Mohammad Amin Kuhail, Jose Berengueres, Fatma Taher, Sana Khan, Ansah Siddiqui
All Works
The existing literature has highlighted the potential of Artificial Intelligence (AI) tools in enhancing ideation and optimizing functionality across various engineering disciplines. However, a comprehensive understanding of the impact of AI on the engineering design process, particularly in creating innovative and efficient designs, is currently lacking. This research specifically investigates the integration of AI in developing space-haptic boots by utilizing haptic technology for immersive virtual interactions. The study analyzes the role of an AI tool, ChatGPT-3.5, in the design process, starting from requirement gathering to prototyping and testing, to assess the effectiveness and challenges of AI in engineering design. We …
Ecology Of Tetrodotoxin Toxicity And Ectoparasite Burden Of Hong Kong Newt Populations, Wing Yan Yip
Ecology Of Tetrodotoxin Toxicity And Ectoparasite Burden Of Hong Kong Newt Populations, Wing Yan Yip
Lingnan Theses (MPhil & PhD)
Many amphibians have defensive chemicals in their skin. Newts from the family Salamandridae possess a potent neurotoxin - tetrodotoxin (TTX). TTX toxicity has been studied intensively, with the aim of revealing the function and origin of TTX in this family. Research has found within- and between-population variations in North American newts like Taricha, possibly related to co-evolution with its predator, symbiotic bacteria, or several life history traits (e.g., sex and life stage). However, our knowledge about TTX ecology in the Asian newt clade is relatively limited. Additionally, a group of water mites, Lurchibates, specifically parasitizes Asian newts, but …
Synthesis Of Zno: Zro2 Nanocomposites Using Green Method For Medical Applications, Mohammed J. Tuama, Maysoon F. Alias
Synthesis Of Zno: Zro2 Nanocomposites Using Green Method For Medical Applications, Mohammed J. Tuama, Maysoon F. Alias
Karbala International Journal of Modern Science
These days, nanocomposites are very popular, especially in medical applications. The spread of diseases in general, and those caused by microbes and cancerous diseases in particular, and the increased resistance of these diseases to antibiotics, have led to the need for the rapid, low-cost, and environmentally friendly production of nanocomposites. To create the chemical G-ZnO: ZrO2 and S-ZnO: ZrO2 (green technique), two different plant extracts were utilized: Z. officinal and S. aromaticum. The effective synthesis and acceptable properties features of the nanoparticles were confirmed using characterization techniques such as X-ray diffraction (XRD), Fourier transform infrared (FTIR) , diffuse reflectance spectroscopy …
Systematic Review On Isolation, Purification, Characterization, And Industrial Applications Of Thermophilic Microbial Α- Amylases, Rugaiyah A. Arfah, Sarlan Sarlan, Abdul Karim, Anita Anita, Ahyar Ahmad, Paulina Taba, Harningsih Karim, Siti Halimah Larekeng, Dorothea Agnes Rampisela, Rusdina Bte Ladju
Systematic Review On Isolation, Purification, Characterization, And Industrial Applications Of Thermophilic Microbial Α- Amylases, Rugaiyah A. Arfah, Sarlan Sarlan, Abdul Karim, Anita Anita, Ahyar Ahmad, Paulina Taba, Harningsih Karim, Siti Halimah Larekeng, Dorothea Agnes Rampisela, Rusdina Bte Ladju
Karbala International Journal of Modern Science
The α-amylase enzyme, sourced from diverse organisms, including plants, animals, and bacteria, plays a crucial role in multiple industries, notably food processing sectors like cakes, fruit juices, and starch syrup. Research identifies thermophilic organisms as prime sources of this enzyme thriving at temperatures ranging from 41°C to 122°C. The enzyme purification was carried out using liquid-liquid extraction, which involved the exchange of substances between two liquid phases that were immiscible or partially soluble. The optimal temperature for α-amylase was 45 to 90°C. The best pH for bacterial and fungal α-amylases ranged from 5.0 to 10.5 and 5.0 to 9.0. Based …
Fostering Trust Through User Interface Design In Multi-Drone Search And Rescue, Johanna Ahlskog, Maria Theresa Bahodi, Artur Lugmayr, Timothy Merritt
Fostering Trust Through User Interface Design In Multi-Drone Search And Rescue, Johanna Ahlskog, Maria Theresa Bahodi, Artur Lugmayr, Timothy Merritt
Research outputs 2022 to 2026
Unmanned Aerial Vehicles (UAVs), or drones, are increasingly used in search and rescue (SAR) missions, with pilots transitioning from manual control of single drones to more collaborative tasks orchestrating semi-autonomous fleets. Designing user interfaces to support UAV pilots effectively is crucial to improving the success of search missions. We developed two versions of a multi-drone SAR system prototype to simulate SAR missions and evaluated them with professional UAV SAR pilots in Sweden. Both versions showed the flight paths of the UAVs, yet in one version, a heatmap was overlayed to provide information from a lost person model. We evaluated situational …
Biochar And Biosorbents Derived From Biomass For Arsenic Remediation, Gaurav Sharma, Yaksha Verma, Chin Wei Lai, Mu Naushad, Jibran Iqbal, Amit Kumar, Pooja Dhiman
Biochar And Biosorbents Derived From Biomass For Arsenic Remediation, Gaurav Sharma, Yaksha Verma, Chin Wei Lai, Mu Naushad, Jibran Iqbal, Amit Kumar, Pooja Dhiman
All Works
Global groundwater contamination by Arsenic (As) presents a grave danger to the health of living beings and wildlife, demanding comprehensive remediation strategies. This review delves into the complex landscape of arsenic remediation, encompassing its chemical forms, occurrences, sources, and associated health risks. Advanced techniques, notably biomass-derived adsorbents, emerge as promising and cost-effective solutions. The exploration spans preparing and modifying biomass-derived adsorbents, unraveling their adsorption capacity, influencing factors, isotherms, kinetics, and thermodynamics. Noteworthy attention is given to plant-agricultural waste, algal-fungal-bacterial, and iron-modified biomass-derived adsorbents. The comprehensive discussion of the adsorption mechanism highlights the efficacy of low-cost biomass, particularly from plant, animal, …
Human Capital At Home: Evidence From A Randomized Evaluation In The Philippines, Noam Angrist, Sarah Kabay, Dean S. Karlan, Lincoln Lau, Kevin M. Wong
Human Capital At Home: Evidence From A Randomized Evaluation In The Philippines, Noam Angrist, Sarah Kabay, Dean S. Karlan, Lincoln Lau, Kevin M. Wong
Education Division Scholarship
Children spend most of their time at home in their early years, yet efforts to promote human capital at home in many low- and middle-income settings remain limited. We conduct a randomized controlled trial to evaluate an intervention which encourages parents and caregivers to foster human capital accumulation among their children between ages 3 and 5, with a focus on math and phonics skills. Children gain 0.52 and 0.51 standard deviations relative to the control group on math and phonics tests, respectively (p<0.001). A year later effects persist, but math gains dissipate to 0.15 (p=0.06) and phonics to 0.13 (p=0.12). Effects appear to be mediated largely through instructional support by parents and not other parent investment mechanisms, such as more positive parent-child interactions or additional time spent on education at home beyond the intervention. Our results show that parents can be effective conduits of educational instruction even in low-resource settings.
Effects Of Applied Nitrogen And Rest Period On Forage Production And Silage Quality, L Juan Carlos Dumont, A Francisco Lanuza
Effects Of Applied Nitrogen And Rest Period On Forage Production And Silage Quality, L Juan Carlos Dumont, A Francisco Lanuza
IGC Proceedings (1977-2023)
An experiment to analyse the effect of nitrogen (N) fertiliser and rest period initiation for silage making on permanent pasture was carried out. N fertiliser increased forage production, crude protein, neutral detergent fibre and ammonia-N. Shortening the intervals, by delaying the initiation of resting period, increased forage quality with only marginal decreases in dry matter (DM) production. Resting periods from the second week of September and cutting at the end of October or first week of November was appropriate in the Osorno area of Chile. The use of 60 kg N/ha is recommended. Two-cutting system must be considered in order …
Change In Botanical Composition, Dry Matter Yield And Forage Quality Of Grassland After Five Seasons Of Extensification, W Kuhbauch, J Schellberg
Change In Botanical Composition, Dry Matter Yield And Forage Quality Of Grassland After Five Seasons Of Extensification, W Kuhbauch, J Schellberg
IGC Proceedings (1977-2023)
Extensification of grassland management in Germany has 2 major objectives (I) to reduce the surplus of crop and animal products, and (2) to diminish unwanted side effects against the environment from intensive production systems. Some of the programmes on offer require a reduced number of cuttings and grazings per season, including a very late first cut of the sward and a reduction of nitrogen fertiliser. In a 5-yenr experiment at the grassland research station Rengen, Eifel-mountain-range, Germany, extensification of this type on productive grassland sites created an unbalanced botanical composition and, with nitrogen applied, a major portion of quackgrass in …
Efficiency Of Different Implements For Pasture Interseeding, J A. Josifovich
Efficiency Of Different Implements For Pasture Interseeding, J A. Josifovich
IGC Proceedings (1977-2023)
Pasture renovation with grasses and legumes appears to be a good practice to increase primary and secondary production. Trials were planted in 6 locations in Buenos Aires province, Argentina, 2 in Pergamino and 4 200 and 300 km south east of Pergamino, to evaluate 3 different implement combinations: a) rigid chisel coulter, b) spring tooth heavy duty coulter, with teeth 30 cm apart followed by spring tooth cultivators, and c) spring tooth heavy duty coulter 30 cm used twice in the same direction. The species sown were: fescue (Festuca arundinacea Schreb.), brome (Bromus uniolides H.B.K.), chicory (Cichoriu, intybus …
Role Of Mixed Animal Type Grazing In Range Preservation And Increasing Animal Product Output, T Nolan, J Connolly, C Sall
Role Of Mixed Animal Type Grazing In Range Preservation And Increasing Animal Product Output, T Nolan, J Connolly, C Sall
IGC Proceedings (1977-2023)
fhe work was part of a research programme to a) evaluate the role of mixed animal type grazing in increasing production, b) explain any; benefits obtained and c) develop improved whole grazing ecosystems in temperate and semi-arid areas. Its specific ai was to improve domestic food production from range grazing livestock and to preserve or improve native range resources. This paper discusses some recent results from the Senegalese Sahel related to· animal preferential and differential selection, animal performance and the role of mixed grazing in improving the relationships between them to secure the objectives stated. The use of these results …
Effect Of Grass-White Clover Mixtures On Steer Performance And Sward Characteristics In Atlantic Canada, H T. Kunelius, P Narasimhalu
Effect Of Grass-White Clover Mixtures On Steer Performance And Sward Characteristics In Atlantic Canada, H T. Kunelius, P Narasimhalu
IGC Proceedings (1977-2023)
Pasture production in winter cold regions such as Atlantic Canada is limited by the availability of winter hardy and productive grass and legume species, Perennial ryegrass (Lolium perenne L.), meadow fescue (Festuca prarensis Huds.) and timothy (Phleum pratense L.) grown in binary mixtures with white clover (Trifolium repens L.), and naturalised pasture consisting of Poa spp., Agrostis spp. and white clover, were compared under grazing, Steers were used to graze the swards from 16-26 cm down to 8 or 11 cm post-grazing surface heights, Dry matter intake was higher for natural pasture than for sown pastures, …