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Articles 541 - 570 of 9401
Full-Text Articles in Entire DC Network
Comparative Study Of Some Varieties Of Cowpea I- Productivity And Nutritive Analysis, K M. Ghobrial, M A. Gabra
Comparative Study Of Some Varieties Of Cowpea I- Productivity And Nutritive Analysis, K M. Ghobrial, M A. Gabra
IGC Proceedings (1977-2023)
In Egypt, the serious problem of feed shortage, especially of green summer fodder suppresses the improvement of animal production. Therefore, dependence on improving local food and food resources for both animals and humans becomes a «must» for a right policy. The animal feeding system is depending on the cultivation of berseem (Trifolium alexandrium L.). It produces annually around 4.81 million tons starch value/year and could cover the requirements of animals with surplus of 0.92 million tons starch value. However, in summer period, there will be at least a deficiency of 1.50 million tons starch value and most animals are …
Early-Maturing And High-Yielding New Pea Varieties Zhongwan N1, N2, N3, And N4, Yunyue Sun, Jiakai Su
Early-Maturing And High-Yielding New Pea Varieties Zhongwan N1, N2, N3, And N4, Yunyue Sun, Jiakai Su
IGC Proceedings (1977-2023)
Pea is one of the main edible beans for the Chinese people. The total output of pea in China is third only to that of soybean and broad bean. In the main producing area, pea is a protein supplement feed for the animals and poultry next to bean meal. However, the planting area was restricted because most of the old varieties have long growing periods. The yield is low, the seed quality is poor, the plant is high, so it is easy to lodge. Therefore we selected and bred new pea varieties with earlymaturing,' high-yielding, low-plant and erect as well …
The Performance Of Wheatgrass Cultivars In Inner Mongolia Of China, Yun Jing-Feng, Mi Fu-Gui
The Performance Of Wheatgrass Cultivars In Inner Mongolia Of China, Yun Jing-Feng, Mi Fu-Gui
IGC Proceedings (1977-2023)
Crested wheatgrass (Agropyron J. Gaertn) is native to Eurasia and most commonly occurs in southern regions of the U.S.S.R., northern regions of China and the P.R. of Mongolia. It is a main species component of steppe, sandy regions of steppe and mountain vegetation. Crested wheatgrass is a very winter-hardy, drought-resistant, extremely long-lived perennial bunchgrass. It regrows very early in the spring and turns yellow very late in the fall, maintaining a period of green growth more than 7 months. It is more widely used for rangeland improvement and artificial pasture establishment in the arid and semi-arid regions. There are …
Genetic Engineering For Pastures, W J. Peacock
Genetic Engineering For Pastures, W J. Peacock
IGC Proceedings (1977-2023)
The flrst genetically engineered food products frolll hotticultural production systems are now enlering the Market and field trials of genetically engineered crop species are well advanced. We can expect that a range of crop cultivars, in which genetic engineering is n component of the breeding process, will soon go into broad ncre agriculture. Pasture species are nut far behind. Gene transfer systems are in place for a number of temperate and tropical pasture legumes and even for a few species of more dlrficult grasses. Genetic transfer systems are In place for a numoec of temperate and tropical pastvce legumes and …
Ammonia Volatilisation And Loss From Grassland Systems, S C. Jarvis, B F. Pain, D J. Hatch, R B. Thompson
Ammonia Volatilisation And Loss From Grassland Systems, S C. Jarvis, B F. Pain, D J. Hatch, R B. Thompson
IGC Proceedings (1977-2023)
There is considerable interest in monitoring flows of nitrogen (N) through various parts of grassland systems. Until recent developments in methodology it had been particularly difficult to assess the contribution of NH3 volatilisation to N cycling. Emission rates for NH3 over Europe are thought to have increased by 50 % over the past 30-40 years and to arise largely from livestock excreta. This occurs after the hydrolysis of excreted urea and, with cattle, takes place directly from grazed swards, animal houses (during overwintering) and stored or applied slurry. As well as the economic losses, NH3 fluxes have important environmental consequences …
Nitrogen Losses From Cattle Dung, Y Sugimoto, P Roger Ball
Nitrogen Losses From Cattle Dung, Y Sugimoto, P Roger Ball
IGC Proceedings (1977-2023)
Nitrogen (N) recylcing through animal excreta has long been considered beneficial to soil fertility in pasture. However, it was revealed recently that substantial N loss occurred via urine patches in intensively managed grass-clover pastures in New Zealand (Ball et al, 1979 and 1981; Ball and Ryden, 1984). Nitrogen flow through dung patches is another main process in N recycling, as one-third to a half ot the N excreted by cattle and sheep is voided in dung (Whitehead, 1970; Sugimoto et al, 1987). The objective of this research was to determine the nitrogen losses from cattle dung in a ryegrass-white clover …
Effect Of Nitrogen On Herbage Growth And Intake By Sheep In Continuously Grazed Swards Of Tall Fescue Genotypes, A Mazzanti, G Lemaire, F Gastal
Effect Of Nitrogen On Herbage Growth And Intake By Sheep In Continuously Grazed Swards Of Tall Fescue Genotypes, A Mazzanti, G Lemaire, F Gastal
IGC Proceedings (1977-2023)
Relatively little is known about the growth of tall fescue under continuous grazing. Most of reported works about herb age production in such a grazing management have been done with perennial ryegrass and with relatively high levels of nitro gen fertilisation (Hodgson, 1981 ; Bircham, 1981; Parsons et al., 1983). The effect ot the level N nutrition on growth of a continuously grazing sward has not been yet studied. On intermitently defoliated swards of tall fescue, Gastal & Lemaire (1988) have shown that with non limiting level of N nutrition the increase in dry matter production could be 4 or …
Performance Of Cartenoid Pigments Of King Gras (Pennisteum Purperum) Mutants, J Lauzan, R S. Herrera, R O. Martinez, R Cruz
Performance Of Cartenoid Pigments Of King Gras (Pennisteum Purperum) Mutants, J Lauzan, R S. Herrera, R O. Martinez, R Cruz
IGC Proceedings (1977-2023)
Previous studies from this series have indicated the variability reached in respect to yields and quality of the king grass clones obtained by in vitro tissue culture. The study of the photosynthetic pigments could contribute to explain the performance of these somaclones in respect to their growth and development. Thus, the objective of the present experiment was to learn the content and variation of chlorophyll a, chlorophyll b and carotenoids.
The Effects Of Coconut Palms On Pasture Understory, R W. Snaydon, D.N S. Fernando, R Sangakkara
The Effects Of Coconut Palms On Pasture Understory, R W. Snaydon, D.N S. Fernando, R Sangakkara
IGC Proceedings (1977-2023)
Pastures are extensively grown under coconut palms, and mainly grazed by cattle (Plucknett, 1979). The main advantages of this form of mixed cropping are : (a) diversification of products, (b) additional income, (c) feed for draft animals, (d) weed control, and (e) more rapid nutrient cycling. Surprisingly little information is available on the effects of pastures and coconut palms on each other (Plucknett, 1979) ; even less is known about the mechanisms of competition between them. This study was designed to study the effects of coconut palms on pasture. A trenching technique was used to investigate the effects of below-ground …
Preliminary Rate Of Growth Curves For Legume Based Improved Pastures In The Mid-Altitude Region Of Yunnan Province Of Southern China, J R. Bruce-Smith, Yang Guo-Rong, Huang Bi-Zhi, Li Ji-Xin
Preliminary Rate Of Growth Curves For Legume Based Improved Pastures In The Mid-Altitude Region Of Yunnan Province Of Southern China, J R. Bruce-Smith, Yang Guo-Rong, Huang Bi-Zhi, Li Ji-Xin
IGC Proceedings (1977-2023)
Yunnan Province in south west China is very mountainous and has several major climatic/ecological zones ranging from tropical to alpine but all are dominated by the south Asian monsoonal rainy season. Extensive tracts of hilly depleted range lands occur in the mid-altitude zone (1800-2500 m) that are potentially suitable for developing to improved legume based pastures. Results of investigations as to suitable species and appropriate fertilizers for this purpose have been discussed previously (Mathison et al., 1985 and Wang et al., 1985). The Project has succesfully established model farms at several places throughout the Province and these carry reasonably productive …
Economics Of Controlling Weeds Of Permanent Pasture, I Popay, N Barlow
Economics Of Controlling Weeds Of Permanent Pasture, I Popay, N Barlow
IGC Proceedings (1977-2023)
In general, inedible weeds of permanent pasture reduce pasture dry matter available to stock in direct proportion to their cover (Doyle et al., 1984). Translating the effects of weeds on pasture to reductions in animal production is difficult because (i) pasture value can range from zero to the cost of purchased feed (ii) weed effects and pasture value can vary seasonally and interact and (iii) reductions in pasture availability at one time affect later growth (Auld et al., 1987). There have been few direct measurements of effects of pasture weeds on animal productivity, because of the co.sts involved. However, simulation …
Variation In Hypericum Perforatum L. In Australia, M H. Campbell, C E. May, I A. Southwell, J D. Tomlinson
Variation In Hypericum Perforatum L. In Australia, M H. Campbell, C E. May, I A. Southwell, J D. Tomlinson
IGC Proceedings (1977-2023)
In Australia Hypericum perforatum (St. John's wort) is a major weed of pastures because it replaces useful vegetation, causes photosensitisation in grazing animals, depresses their central nervous system and renders them hypersensitive to temperature change and handling (Campbell and Delfosse, 1984). H. perforatum infested 188,000 ha in New South Wales (N.S.W.) in 1976, (Campbell, 1977) and 173,000 ha in Victoria in 1983 (Shepherd, 1983). Specimens of H. perforatum collected in 1929 in N.S.W., Victoria and South Australia were classed as the narrow leaved var. angustifolium De Candolle (Calvert, 1930, 1932) at the Royal Botanic Gardens, Kew (B. Mathew, pers. …
The Potential For Pasture Seed Production In Yunnan Province, Southern China, Li Shuan
The Potential For Pasture Seed Production In Yunnan Province, Southern China, Li Shuan
IGC Proceedings (1977-2023)
The objective of the seed production team has been to develop commercial seed production capabilities in the Yunnan Livestock and Pasture Development Project areas in Yunnan (Vaughan, 1987). It is mainly a mountainous area with altitudes ranging from 86 min the SE to 6,580 m in the NW. Since 1983, 523 cultivars or breeding materials of many tropical, transitional and temperate species have been introduced for evaluation at 13 sites in different ecological zones. About 90 cultivars show good adaption and produce high yields of dry matter.
A Comparison Of Rhizome And Seed Propagation Of Three Grasses Of Nei Mongol: Chinese Wildrye, Tender Pennisteum And Reedlike Foxtail, Na Sen, Lee Yan Qin, Su Xiao Lin
A Comparison Of Rhizome And Seed Propagation Of Three Grasses Of Nei Mongol: Chinese Wildrye, Tender Pennisteum And Reedlike Foxtail, Na Sen, Lee Yan Qin, Su Xiao Lin
IGC Proceedings (1977-2023)
China is making great efforts to re-vegetate and improve her rangelands. In Inner Mongolia, improvement and expansion of the rangeland base is necessary to meet the needs of a flourishing local livestock industry, and growing demand for livestock products (including draft animals) in China as a whole. But the harsh growing conditions in this cold, dry and windy steppe country make seedling establishment difficult, and propagation with seed is risky at best. Methods of grassland propagation that minimize this risk, reduce the rest period after planting, and result in a more productive range will aid the revegetation effort considerably, and …
Modification Of Stolon Growth, Development And Flowering By Plant Growth Regulators In White Clover (Trifolium Repens L.) Seed Crops, A H. Marshall, D H. Hides
Modification Of Stolon Growth, Development And Flowering By Plant Growth Regulators In White Clover (Trifolium Repens L.) Seed Crops, A H. Marshall, D H. Hides
IGC Proceedings (1977-2023)
Within the EEC the need to develop low cost less intensive systems of animal production has led to an increase in the importance of legumes generally, and white clover in particular. At present, annual white clover seed usage within the EEC is approximately 4,000 tonnes, however, the self sufficiency rate is expected to fall below 50 % by the end of the 1980s due principally to unpredictable seed yields which make it an unprofitable crop for seed growers. The main component of seed yield in white clover is the number of ripe inflorescences at harvest (Zaleski, 1961) however, the proportion …
Plant Resources And Forage Seed Production In China, Dong Peihua
Plant Resources And Forage Seed Production In China, Dong Peihua
IGC Proceedings (1977-2023)
China is situated in the Eastern part of Asia ; from North to South it extends across the temperate and tropical zones. From East to West it has humid, semiarid, arid regions. There is no frost through the year in some part ofHainan Island, Yunnan, Guangdong and Taiwan provinces. Therefore plants grow the year round and there is a wide range of tropical species. The geographical and climatical differences resulted in rich grass resources. There are three hundred million hectares of natural pastures in Northern China, with more than 4000 plant species. These plants have different degrees of feeding value. …
The Effect Of Weed Control Using Herbicide On Soil Bacteria, Growth, And Yield Of Sweet Corn, Lafi Na'imatul Bayyinah, Purwanto, Risqa Naila Khusna Syarifah, Rama Adi Pratama, Ida Widiyawati, Hendra
The Effect Of Weed Control Using Herbicide On Soil Bacteria, Growth, And Yield Of Sweet Corn, Lafi Na'imatul Bayyinah, Purwanto, Risqa Naila Khusna Syarifah, Rama Adi Pratama, Ida Widiyawati, Hendra
Jurnal Kultivasi
Weeds are managed by herbicides, but this can reduce the abundance of soil bacteria. This research aimed to determine the effect of active compounds of herbicides on weeds, the abundance of soil bacteria, growth and yield of sweet corn. The experiment was conducted from June to October 2023 in the fields and Laboratory of Agronomy and Horticulture, Universitas Jenderal Soedirman, Purwokerto. A randomized block design was used, consisting of eight treatments and four replications. The treatments included control (H0); weeding (H1); paraquat (H2); glyphosate (H3); paraquat, atrazine, mesotrione (H4); glyphosate, atrazine, mesotrione (H5); paraquat, atrazine, mesotrione, nicosulfuron (H6); and glyphosate, …
Innovative Soil Classification Approach For Achieving Global Biodiversity Framework Utilizing Integrated Data Fusion Of Emit And Multispectral Satellite Observations: Case Study Of Imam Turki Bin Abdullah Royal Reserve, Kingdom Of Saudi Arabia, Hesham Morgan, Ali Elgendy, Surendra Maharjan, Wenzhao Li, Tamer Ismail, Yehya Kh. Shehadeh, Ahmed Elgharib, Ahmed Abdullah Al-Dughairi, Ali El Muburak, Khaled Allam Harhash, Hesham El-Askary
Innovative Soil Classification Approach For Achieving Global Biodiversity Framework Utilizing Integrated Data Fusion Of Emit And Multispectral Satellite Observations: Case Study Of Imam Turki Bin Abdullah Royal Reserve, Kingdom Of Saudi Arabia, Hesham Morgan, Ali Elgendy, Surendra Maharjan, Wenzhao Li, Tamer Ismail, Yehya Kh. Shehadeh, Ahmed Elgharib, Ahmed Abdullah Al-Dughairi, Ali El Muburak, Khaled Allam Harhash, Hesham El-Askary
Mathematics, Physics, and Computer Science Faculty Articles and Research
Soil classification is essential for sustainable land management, ecological conservation, and combating desertification, particularly in arid and semi-arid regions. This study integrates hyperspectral data from the Earth Surface Mineral Dust Source Investigation (EMIT) and multispectral imagery from Sentinel-2 to achieve accurate soil classification for the Imam Turki bin Abdullah Royal Reserve (ITBA) in Saudi Arabia. Using advanced Machine Learning (ML) techniques, including Extreme Gradient Boosting (XGBoost), the study highlights the power of data fusion in addressing the limitations of standalone remote sensing methods. The integration of hyperspectral and multispectral data combines the spectral richness of hyperspectral imaging with the spatial …
College Of Natural Sciences Newsletter, Spring 2025, College Of Natural Sciences
College Of Natural Sciences Newsletter, Spring 2025, College Of Natural Sciences
College of Natural Sciences Newsletters and Reports
Page 1 Dean's Message from Dr. Sen Subramanian
Page 2 Student Spotlights
Page 3 Kaushik honored, Three-Minute Thesis, & Ice Cores revealed
Page 4 Alumni Spotlight
Page 5 Day of Scholars
Page 6 Cyanide research, Record Research Expenditures, Adhikari awarded Miller Research Award
Page 8 Hanson Receives NSF Grant
Page 9 Snow Lab Research Team
Page 10 Faculty Awards
Page 11 Drone Day
Page 13 Khalaf Awarded Presidential Award
Monitoring Sand Migration In Al Ain City Utilizing Remote Sensing Techniques, Sanad Salem Mohammad Fareaa
Monitoring Sand Migration In Al Ain City Utilizing Remote Sensing Techniques, Sanad Salem Mohammad Fareaa
Theses
Sand migration significantly impacts urban development, infrastructure, and ecosystems in arid regions such as Al Ain city, United Arab Emirates (UAE). This study employs advanced remote sensing techniques to monitor and predict sand dune migration across the Sieh Al Hama dune field, a critical area west of Al Ain. The research objectives include quantifying dune migration rates over three years (2018–2020) using monthly Sentinel-2 satellite imagery, identifying distinct dune fields, and analyzing the textural and mineralogical properties of dune sediments to infer their provenance. Field sampling from four dunes (Large Sabra Dune, Dune 1, Dune 2, and Dune 3) was …
Study Of Falāj Pathways And Their Unknown Extension In Al Ain City Using Geophysical Methods, Saud Mohammed Alsenaani
Study Of Falāj Pathways And Their Unknown Extension In Al Ain City Using Geophysical Methods, Saud Mohammed Alsenaani
Theses
Historically, the city of Al Ain has relied on its Falāj systems as historic water resources for freshwater, which is vital for drinking and irrigating its oases and essential for supporting life in the region for centuries, providing the foundation for communities and farming. The remarkable rainfall in 2024 uncovered several hidden ancient Falāj systems and newly enlarged versions of previously recorded ones, highlighting the importance of ongoing research for their preservation. This research project aims to examine the current Falāj systems in Al Ain, particularly Falāj Mezyad, using geophysical methods to identify uncharted extensions and to examine current Falāj …
Per- And Polyfluoroalkyl Substance (Pfas) Degradation In Water And Soil Using Cold Atmospheric Plasma (Cap): A Review, Victor Somtochukwu Mbanugo, Boluwatife Stephen Ojo, Ta Chun Lin, Yue-Wern Huang, Marek Locmelis, Daoru Han
Per- And Polyfluoroalkyl Substance (Pfas) Degradation In Water And Soil Using Cold Atmospheric Plasma (Cap): A Review, Victor Somtochukwu Mbanugo, Boluwatife Stephen Ojo, Ta Chun Lin, Yue-Wern Huang, Marek Locmelis, Daoru Han
Biological Sciences Faculty Research & Creative Works
Per- and polyfluoroalkyl substances (PFASs) are persistent organic chemicals found in numerous industrial applications and everyday products. The excessive amounts of PFASs in water and soil, together with their link to severe health issues, have prompted substantial public concerns, making their removal from the environment a necessity. Existing degradation techniques are frequently lacking due to their low efficiency, cost-effectiveness, and potential for secondary contamination. Cold Atmospheric Plasma (CAP) technology has emerged as a promising alternative, utilizing energized reactive species to break down PFASs under ambient conditions. Therefore, this review examines the efficacy and effectiveness of CAP in degrading PFASs by …
Stratigraphic Characteristics And Shale Gas Enrichment Interval Distribution Of The Lower Cambrian Qiongzhusi Formation, Upper Yangtze Region, China, Wang Hongyan, Shi Zhensheng, Zhao Qun, Zhou Tianqi, Wang Pengfei
Stratigraphic Characteristics And Shale Gas Enrichment Interval Distribution Of The Lower Cambrian Qiongzhusi Formation, Upper Yangtze Region, China, Wang Hongyan, Shi Zhensheng, Zhao Qun, Zhou Tianqi, Wang Pengfei
Coal Geology & Exploration
Objective Shales in the Lower Cambrian Qiongzhusi Formation within the Upper Yangtze region preserve critical information about primitive oceans. Furthermore, these shales serve as vital source rocks and reservoirs, having demonstrated considerable potential for shale gas exploration. Methods Using seismic, borehole, and outcrop data, this study investigated the shale strata and their distribution in the Qiongzhusi Formation through comparative analysis. Accordingly, the sweet-spot interval was determined. Results and conclusions The results indicate that the Lower Cambrian Qiongzhusi Formation in the Upper Yangtze region can be divided into the first and second members (also referred to as the Qiong 1 and …
Designing A Cave Air Monitoring System: Guide And Feedback From 15 Years Of Monitoring The Cussac Cave (France), Nicolas Peyraube, Jessica D. Villanueva, Fabien Naessens, Roland Lastennet, Sylvain Mateo, Alain Denis
Designing A Cave Air Monitoring System: Guide And Feedback From 15 Years Of Monitoring The Cussac Cave (France), Nicolas Peyraube, Jessica D. Villanueva, Fabien Naessens, Roland Lastennet, Sylvain Mateo, Alain Denis
International Journal of Speleology
Understanding the cave’s ventilation system is important for determining how the cavity interacts with external airflow. This requires a well-designed monitoring system. This article addresses these key aspects: how to build a monitoring system for cave air parameters and how to assess the ventilation of a cave. We proposed a flowchart to help address the issues in: 1) the modularity of a monitoring system, 2) the use of “homemade device” or “ready to use device”, 3) the frequency of measure and its effect on the electrical consumption, 4) the duration of the survey, and 5) the accessibility of the recorded …
The Few-Nexus: Using Soil To Grow Meaning And Relevance In Undergraduate General Education Earth Science Courses, Katherine Mccarville
The Few-Nexus: Using Soil To Grow Meaning And Relevance In Undergraduate General Education Earth Science Courses, Katherine Mccarville
National Collaborative for Research on Food, Energy, and Water Education (NC-FEW)
Soils are central to human survival, through their critical roles in regulating water supplies and providing the medium for most agricultural productivity. Even as fewer and fewer students know where their water and food come from, and where their wastes go, soils tend to be under-emphasized in Earth science general education courses. Combining a place-based focus on soils with the FEW-Nexus model provides an integrating context for concepts and information that students sometimes perceive as disconnected and irrelevant to them. This approach can transform the experiences and learning of undergraduate students in the Earth science general education curriculum.
Refugium Amidst Ruins: Unearthing The Lost Flora That Escaped The End-Permian Mass Extinction, Huiping Peng, Wan Yang, Mingli Wan, Jun Liu, Feng Liu
Refugium Amidst Ruins: Unearthing The Lost Flora That Escaped The End-Permian Mass Extinction, Huiping Peng, Wan Yang, Mingli Wan, Jun Liu, Feng Liu
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Searching for land refugia becomes imperative for human survival during the hypothetical sixth mass extinction. Studying past comparable crises can offer insights, but there is no fossil evidence of diverse megafloral ecosystems surviving the largest Phanerozoic biodiversity crisis. Here, we investigated palynomorphs, plant, and tetrapod fossils from the Permian-Triassic South Taodonggou Section in Xinjiang, China. Our fossil records, calibrated by a high-resolution age model, reveal the presence of vibrant regional gymnospermous forests and fern fields, while marine organisms experienced mass extinction. This refugial vegetation was crucial for nourishing the substantial influx of surviving animals, thereby establishing a diverse terrestrial ecosystem …
Characterizing Rainfall Variability Within A Series Of Storms Over Northern California In February 2017, Parker Jan Malek
Characterizing Rainfall Variability Within A Series Of Storms Over Northern California In February 2017, Parker Jan Malek
Dissertations and Theses
In February 2017, a series of storms with associated atmospheric rivers (ARs) made landfall in the US state of California, dropping large amounts of precipitation over the Sierra Nevada Mountains and their western foothills. The rainfall from these ARs, long, narrow bands of water vapor that transport large amounts of water vapor from the tropics to the mid-latitudes, instigated the near-failure of the Oroville Dam located at the southeastern edge of the Feather watershed outside the city of Oroville in the state's Central Valley. This case study provides a synoptic and mesoscale diagnosis of the drivers of rainfall pulses that …
Closing Ceremony Speech, S. Ray Smith
Closing Ceremony Speech, S. Ray Smith
IGC Proceedings (1977-2023)
No abstract provided.
Strategies Of Fertilizer Nitrogen Applications To Grassland For Beef: Effects On Production And Soil Mineral Nitrogen, N M. Titchen, R J. Wilkins, L Philipps, D Scholefield
Strategies Of Fertilizer Nitrogen Applications To Grassland For Beef: Effects On Production And Soil Mineral Nitrogen, N M. Titchen, R J. Wilkins, L Philipps, D Scholefield
IGC Proceedings (1977-2023)
Experiments in Britain have shown beef production increases with fertilizer-N application to grazed grassland up to at least 300 kg N/ha (Wilkins et al., 1987; Baker and Mayne, 1988). However in view of the small offtake of N in the animal products (c.30 kg/ha) there is increased concern on the fate of the applied N, particularly in relation to loss of nitrate by leaching (Garwood and Ryden, 1986). This paper reports a 3-year experiment which examined the impact on production and on N movements of different strategies of fertilizer-N application and of the effects of removing grazing livestock at the …
F.A.O Design K*B*P Trials In The Mid-Altitude Zone Of Yunnan Province, Southern China, J Bruce-Smith, Yang Guo-Rong, Huang Bi-Zhi, Li Ji-Xin
F.A.O Design K*B*P Trials In The Mid-Altitude Zone Of Yunnan Province, Southern China, J Bruce-Smith, Yang Guo-Rong, Huang Bi-Zhi, Li Ji-Xin
IGC Proceedings (1977-2023)
The Project is investigating the development of « improved pastures » as a practical way to increase ruminant livestock production. Some preliminary results of fertilizer requirements, indicated that K and B may be required as well as P (Wang el al., 1985) for the establishment of such pastures in this mid-altitude (2,000 m) transitional sub-tropic-temperate zone of Yunnan. The objective of this paper is to present some experiences from applying the Hauser (1971) truncated factorial design trials (widely used by FAO to obtain N, P, K, fertilizer recommendations for cereal crops) to a pasture establishment situation where P. K and …