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2020

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Articles 2131 - 2160 of 3204

Full-Text Articles in Earth Sciences

Vegetation Restoration Patterns After Rangeland Enclosure In Arid Tunisia, Khalil Mseddi, Ahmad Mohajja Al-Shammari, Hossain Sharif, Mohamed Chaieb Mar 2020

Vegetation Restoration Patterns After Rangeland Enclosure In Arid Tunisia, Khalil Mseddi, Ahmad Mohajja Al-Shammari, Hossain Sharif, Mohamed Chaieb

IGC Proceedings (1977-2023)

In Tunisia arid regions, the increase in the rural populat-ion density, (Le Floc’h et al. 1999) has intensified human pressure on natural resources through ‘‘disturbances’’ such as grazing and wood harvesting, land clearing and ploughing, which largely depend on the annual rainfall. About 10% of the steppe area has been taken over by agriculture, shrinking perennial plant cover and a highly degraded vegetation class (Hanafi and Jauffret 2008). This work assesses the vegetation restoration patterns on a protected agricultural field in Tunisian arid rangeland after 15 years of enclosure and protection against plowing.

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Competition Between Lolium Perenne L. And Agrostis Capillaris L. Growing Under Different Light Regimes As Response To Fertiliser Addition In A Degraded Pasture, Paulina Flores, Ignacio F. López, Peter D. Kemp, José Dörner Mar 2020

Competition Between Lolium Perenne L. And Agrostis Capillaris L. Growing Under Different Light Regimes As Response To Fertiliser Addition In A Degraded Pasture, Paulina Flores, Ignacio F. López, Peter D. Kemp, José Dörner

IGC Proceedings (1977-2023)

At the field level plants can experience solar irradiance fluctuations caused by cloud cover or canopy shading. The majority of the research in this area has been done on forestry/pastoral systems using artificial structures so that the pasture has the desired light level (Peri et al. 2006). However, the effect of a change from high to low irradiance on the seasonal plant growth and production in a degraded pastoral system has not been previously studied, especially when fluctuating light regimes are involved. The aims of this study were to evaluate tillering dynamics of Lolium perenne L. (Lp) and Agrostis …

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Monitoring Of Rehabilitation Of Degraded Rangelands, B. Bouchareb, R. Hammouda, D. Nedjraoui Mar 2020

Monitoring Of Rehabilitation Of Degraded Rangelands, B. Bouchareb, R. Hammouda, D. Nedjraoui

IGC Proceedings (1977-2023)

The Algerian steppe covers an area of about 20 million ha, and is the barrier between the desert and the Mediterranean region. With more than 20 million sheep, overgrazing is an important issue resulting in continued degradation of the natural resources (Nedjraoui and Bedrani 2008). Trials of the rehabilitation of these ecosystems were undertaken in a participatory process with farmers complemented by some detailed monitoring of the responses in experimental plots (Hammouda 2009; Bouchareb 2012). This study reports on some results of the ecological monitoring and evaluation for a participatory project, in the steppe of South Algiers, conducted by a …

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Case Study: Conservative Stocking On The Fitzroy River Floodplain; Jubilee Downs And Quanbun Downs, Central Kimberley Western Australia, Kath Ryan, Anne Marie Huey, Paul Novelly, Keith Anderson Mar 2020

Case Study: Conservative Stocking On The Fitzroy River Floodplain; Jubilee Downs And Quanbun Downs, Central Kimberley Western Australia, Kath Ryan, Anne Marie Huey, Paul Novelly, Keith Anderson

IGC Proceedings (1977-2023)

Keith and Karen Anderson and family run a breeder operation on Jubilee Downs and Quanbun Downs in the Fitzroy Valley of Western Australia (18°21' S, 125°18' E). These adjacent pastoral leases are in the shire of Derby/West Kimberley. The Andersons have been managing Jubilee Downs station since 1985. Quanbun Downs station was purchased in 2002, and a farm in the northern agricultural region of WA has been recently added for use as a finishing block. The current combined herd for Jubilee Downs and Quanbun Downs is around 8,000 head. Keith believes in selling close to his branding percentage and that …

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Community Structure Of Oribatid Mites In Improved Grasslands: A Case Study From Central India, Sharmila Roy Mar 2020

Community Structure Of Oribatid Mites In Improved Grasslands: A Case Study From Central India, Sharmila Roy

IGC Proceedings (1977-2023)

About 14% of the land in Central India (25º20'-26º30'N and 79º45'-78º15'E) is classified as grass/range lands, most of which is degraded. In order to improve condition class of these areas, several land development programs have been undertaken by various agencies. However, long term implications of such interventions are not understood properly. Since oribatid mites constitute an important part of soil ecosystem(Noti et al. 2003) having intricate relations with the niches in soil and their community structure is a swift reflection on ecosystem habitat structure, complexity and other factors, this study was planned.

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The Impact Of Surface Coal Mining On The Pre- And Post-Mining Agricultural Potential Of The Grassland Biome Of Southern Africa, Wayne F. Truter, T. Bredell, J. Olivier, D. Van Heerden, P. Mosebi Mar 2020

The Impact Of Surface Coal Mining On The Pre- And Post-Mining Agricultural Potential Of The Grassland Biome Of Southern Africa, Wayne F. Truter, T. Bredell, J. Olivier, D. Van Heerden, P. Mosebi

IGC Proceedings (1977-2023)

Surface mining of coal is widespread in the grassland areas of the Mpumalanga Province in South Africa, and is the main cause of many environmental impacts in this agriculturally important region. To ensure healthy and productive vegetation after the reclamation process, disturbed soils need to be ameliorated and re-vegetated with locally adapted grass species to protect, preserve and improve soils for future agricultural use. To date, soil compaction is regarded as one of the main factors that cause severe restrictions in the effective rooting depth of plants, and the level of compaction is strongly influenced by altered soil water contents, …

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A Polarimetric Radar Analysis Of Cold- And Warm-Based Supercells, Timothy J. Gunkel Mar 2020

A Polarimetric Radar Analysis Of Cold- And Warm-Based Supercells, Timothy J. Gunkel

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Polarimetric analyses of supercell thunderstorms have been increasingly common within the past decade, since operational polarimetric radar data became available in 2013. Although polarimetric signatures within supercell thunderstorms are well known, few have investigated variability in these signatures in differing environments. Polarimetric signatures can provide vital information regarding the microphysical characteristics and processes in supercell thunderstorms. Specific polarimetric signatures of interest are the differential reflectivity (ZDR) column, the low-level polarimetrically inferred hail core, and the ZDR arc. These signatures provide information regarding updraft characteristics, hailfall characteristics, and size sorting processes in the storm- relative inflow. Previous studies …

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High‐Pressure Carbonaceous Phases As Minerals, Oliver Tschauner Mar 2020

High‐Pressure Carbonaceous Phases As Minerals, Oliver Tschauner

Geoscience Faculty Research

High‐pressure carbonaceous minerals establish a link between one of the most abundant chemical elements and processes that occur at high pressures, either in the interior of the Earth or during shock‐metamorphosis in space or on Earth. Diamonds from the Earth's mantle carry inclusions of carbides, carbonates, methane, and carbon‐dioxide. These inclusions elucidate diamond formation and the carbon recycling in the mantle. This chapter focuses on these inclusion minerals themselves, the means of detection, and the reconstruction of pressure‐temperature conditions of their formation in the mantle.

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Spatiotemporal Changes Of Microbial Community Assemblages And Functions In The Subsurface, Madison C. Davis Mar 2020

Spatiotemporal Changes Of Microbial Community Assemblages And Functions In The Subsurface, Madison C. Davis

USF Tampa Graduate Theses and Dissertations

The subsurface hosts diverse microbial community assemblages and functions. These communities play an important role in biogeochemical cycling and groundwater purification. Many physicochemical factors affect microbial communities and can cause short-term or long-term perturbations. Subsurface microbes are susceptible to anthropogenic changes in the environment, which can be caused by nutrient inputs or municipal groundwater extraction. Despite the importance of the subsurface microbiome, these microbial communities are poorly characterized. This dissertation describes the characterization of spatiotemporal drivers of subsurface microbial communities through a variety of techniques that include eDNA analyses, bioinformatics, hydrochemical analyses, stable isotope geochemistry, and multivariate statistics. Three coastal …

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Constraining Prograde Metamorphic Paths In Archean High-Grade Garnet-Bearing Lithologies From The Eastern Beartooth Mountains, Montana, Usa, Larry Fisher Cliff-Tuttle Jr Mar 2020

Constraining Prograde Metamorphic Paths In Archean High-Grade Garnet-Bearing Lithologies From The Eastern Beartooth Mountains, Montana, Usa, Larry Fisher Cliff-Tuttle Jr

LSU Master's Theses

Prograde metamorphic pressures and temperatures of Archean high-grade garnet-bearing lithologies from the eastern Beartooth Mountains of Montana provide an important constraint on the tectonometamorphic history of this terrane and the early Earth in general. A particularly useful means to approximate prograde metamorphic conditions is examining entrapment conditions of garnet mineral inclusions during garnet growth. Lithologies of the eastern Beartooth Mountains are well-suited to this approach because of the presence of abundant mineral inclusions within garnet porphyroblasts. Consequently, prograde metamorphic pressures and temperatures in the Beartooth Mountains, conditions that have only been broadly constrained previously, can be more accurately determined and …

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Accounting For Training Data Error In Machine Learning Applied To Earth Observations, Arthur Elmes, Hamed Alemohammad, Ryan Avery, Kelly Caylor, J. Ronald Eastman, Lewis Fishgold, Mark A. Friedl, Meha Jain, Divyani Kohli, Juan Carlos Laso Bayas, Dalton Lunga, Jessica L. Mccarty, Robert Gilmore Pontius Jr., Andrew Reinmann, John Rogan, Lei Song, Hristiana Stoynova, Su Ye, Zhuang-Fang Yi, Lyndon Estes Mar 2020

Accounting For Training Data Error In Machine Learning Applied To Earth Observations, Arthur Elmes, Hamed Alemohammad, Ryan Avery, Kelly Caylor, J. Ronald Eastman, Lewis Fishgold, Mark A. Friedl, Meha Jain, Divyani Kohli, Juan Carlos Laso Bayas, Dalton Lunga, Jessica L. Mccarty, Robert Gilmore Pontius Jr., Andrew Reinmann, John Rogan, Lei Song, Hristiana Stoynova, Su Ye, Zhuang-Fang Yi, Lyndon Estes

Advanced Science Research Center

Remote sensing, or Earth Observation (EO), is increasingly used to understand Earth system dynamics and create continuous and categorical maps of biophysical properties and land cover, especially based on recent advances in machine learning (ML). ML models typically require large, spatially explicit training datasets to make accurate predictions. Training data (TD) are typically generated by digitizing polygons on high spatial-resolution imagery, by collecting in situ data, or by using pre-existing datasets. TD are often assumed to accurately represent the truth, but in practice almost always have error, stemming from (1) sample design, and (2) sample collection errors. The latter is …

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Changes In Atmospheric, Meteorological, And Ocean Parameters Associated With The 12 January 2020 Taal Volcanic Eruption, Feng Jing, Akshansa Chauhan, Ramesh P. Singh, Prasanjit Dash Mar 2020

Changes In Atmospheric, Meteorological, And Ocean Parameters Associated With The 12 January 2020 Taal Volcanic Eruption, Feng Jing, Akshansa Chauhan, Ramesh P. Singh, Prasanjit Dash

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

The Taal volcano erupted on 12 January 2020, the first time since 1977. About 35 mild earthquakes (magnitude greater than 4.0) were observed on 12 January 2020 induced from the eruption. In the present paper, we analyzed optical properties of volcanic aerosols, volcanic gas emission, ocean parameters using multi-satellite sensors, namely, MODIS (Moderate Resolution Imaging Spectroradiometer), AIRS (Atmospheric Infrared Sounder), OMI (Ozone Monitoring Instrument), TROPOMI (TROPOspheric Monitoring Instrument) and ground observations, namely, Argo, and AERONET (AErosol RObotic NETwork) data. Our detailed analysis shows pronounced changes in all the parameters, which mainly occurred in the western and south-western regions because the …

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Salt-Tolerant Forages For Irrigated Saline Land In Central Iraq, Iman S. Salman, Edward G. Barrett-Lennard, Kareem Kadhim, Shoaib Ismail, Hayley C. Norman Mar 2020

Salt-Tolerant Forages For Irrigated Saline Land In Central Iraq, Iman S. Salman, Edward G. Barrett-Lennard, Kareem Kadhim, Shoaib Ismail, Hayley C. Norman

IGC Proceedings (1977-2023)

Salinity is a major problem in the irrigated zones of central and southern Iraq. We investigated biomass production from five salt-tolerant forage species, represented by 15 introduced accessions and 3 local accessions, during two successive summer growing seasons. Species included pearl millet (Pennisetum glaucum), sorghum (Sorghum bicolour), guar (Cluster bean; Cyamopsis tetragonoloba), cowpea (Vigna unguiculata) and sesbania (Sesbania aculeata and S. sesban). The research site was located in the Al-Dujaila irrigation project area in Wasit. The soil had a silty clay texture with moderate salinity (ECe 10-20 dS/m). The site was …

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Improving Grassland Quality In Communal Arable Lands In The Eastern Cape Province, South Africa, Theunis L. Morgenthal, Pieter W. Conradie, Gideon Jordaan, Unathi Gulwa, Neil Ballard, John Howieson Mar 2020

Improving Grassland Quality In Communal Arable Lands In The Eastern Cape Province, South Africa, Theunis L. Morgenthal, Pieter W. Conradie, Gideon Jordaan, Unathi Gulwa, Neil Ballard, John Howieson

IGC Proceedings (1977-2023)

Overgrazing and shifting cultivation practise have severely degraded communal lands in the Eastern Cape of South Africa. Methods need to be developed to improve forage quality of grazing land, especially previously cultivated lands. The aim of the study was to investigate legume species to rehabilitate arable lands abandoned from cropping, to enhance their forage quality, productivity and ecological integrity. The study was conducted in seven communities within the Eastern Cape Province. This study showed that within the communal lands studied extensive areas have been cultivated and the majority of this land is now poorly utilised. Natural grasslands ploughed for cropping …

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Identifying And Addressing Sustainable Pasture And Grazing Management Options For A Major Economic Sector–The North Australian Beef Industry, Neil D. Macleod, Joe C. Scanlan, Lester I. Pahl, Giselle L. Whish, Robyn A. Crowley Mar 2020

Identifying And Addressing Sustainable Pasture And Grazing Management Options For A Major Economic Sector–The North Australian Beef Industry, Neil D. Macleod, Joe C. Scanlan, Lester I. Pahl, Giselle L. Whish, Robyn A. Crowley

IGC Proceedings (1977-2023)

Sustainable use of the northern grazing lands is a long-standing issue for management and policy, heightened by projections of increased climatic variability, uncertainty on forage supplies, vegetation complexes, and weeds and diseases. Meat and Livestock Australia has supported a large study to explore sustainable grazing management strategies and increase the capacity of the sector to address climate change. Potential options were explored by bio-economic modeling of ‘representative’ beef enterprises defined by pastoralists and supported by regional research and extension specialists. Typical options include diversification, infrastructure, flexible stocking rates, wet season resting, and prescribed fire. Concurrent activities by another team included …

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Grassland Rehabilitation Through Re-Designing Livestock Management Systems, Guodong Han, Zhongwu Wang, Zhiguo Li, Mengli Zhao, David R. Kemp, David L. Michalk, Kris M. Havstad Mar 2020

Grassland Rehabilitation Through Re-Designing Livestock Management Systems, Guodong Han, Zhongwu Wang, Zhiguo Li, Mengli Zhao, David R. Kemp, David L. Michalk, Kris M. Havstad

IGC Proceedings (1977-2023)

Grasslands are one of the most important land types supplying critical ecosystem services including feed for livestock grazing. They occupy ~54% of the world’s ice-free land surface. China contains the third largest area of grassland in the world, ~400 M ha, ~40% of China’s land surface. Chinese grasslands are severely degraded primarily due to overgrazing, which contributes to local poverty because of poor livestock production. To both recover the degraded grassland and to enhance the local herders’ income, a large farm-scale experiment was conducted in a desert steppe of Inner Mongolia, China from 2007 to 2012. We used a baseline …

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Incidence And Control Of Worm Burdens In Bali Bulls Fed Forage Tree Legumes In West Nusa Tenggara, Luh Gde Sri Astiti, Baiq Tutik Yuliana, Muhammad Fauzan, Tanda Panjaitan Mar 2020

Incidence And Control Of Worm Burdens In Bali Bulls Fed Forage Tree Legumes In West Nusa Tenggara, Luh Gde Sri Astiti, Baiq Tutik Yuliana, Muhammad Fauzan, Tanda Panjaitan

IGC Proceedings (1977-2023)

Bali cattle are the predominant domestic cattle raised in smallholder systems in eastern Indonesia. They are characterised by low growth rates partly due to genetic factors but largely due to insufficient and/or poor quality feed and management. Internal parasites can have severe impacts on animal production and are a common problem in eastern Indonesia due to poor hygiene and management practices. Prevalence, or the ratio of number of worm infestation occurrences, in the cattle population is high in West Nusa Tenggara. Astiti et al. (2011) reported prevalence levels of 81% in some area of Sumbawa Island and Astiti and …

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The Occurrence Of Alfalfa Weevil And Its Major Parasitoid Bathyplectes Curculionis Across Saskatchewan, Canada, Juliana J. Soroka Mar 2020

The Occurrence Of Alfalfa Weevil And Its Major Parasitoid Bathyplectes Curculionis Across Saskatchewan, Canada, Juliana J. Soroka

IGC Proceedings (1977-2023)

The alfalfa weevil Hypera postica (Gyllenhal) (Coleoptera: Curculionidae) is one of the most destructive insect pests of alfalfa herbage in North America. Palearctic in origin, the weevil was first found in North America near Salt Lake City, Utah, in 1902 (Titus 1911), with the first Canadian record in southeast Alberta and southwest Saskatchewan in 1954 (Hobbs et al. 1959; Beirne 1971). Alfalfa weevil became an economic pest on the Canadian prairies only in the area of first location, and its distribution remained below the 51st parallel North latitude for about 40 years. In the mid-1990s, however, the weevil expanded …

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Environment Impact Of Moxidectin In Sheep Faeces Upon Dung Diptera In South Of Brazil, Alda L. G. Monteiro, Susana Gilaverte, Maria Angela M. Fernandes, Alessandre P. Colavite, Paulo Guimarães, Mylena T. P. Peres, Cláudio J. A. Da Silva Mar 2020

Environment Impact Of Moxidectin In Sheep Faeces Upon Dung Diptera In South Of Brazil, Alda L. G. Monteiro, Susana Gilaverte, Maria Angela M. Fernandes, Alessandre P. Colavite, Paulo Guimarães, Mylena T. P. Peres, Cláudio J. A. Da Silva

IGC Proceedings (1977-2023)

Dung Diptera can be beneficial to the environment because the adults feed on, deposit eggs in, and the larval nutrition depends on the feaces of animals which significantly im-proves nutrient cycling. However, anthelmintics which are used to control internal parasites have long persistence with a long half-life in faeces. This is harmful to the coprofauna and may adversely affect the diversity of this environmen-tal system. In this study we evaluated the toxicity of moxidectin anthelmintic on the dung Diptera population in pastures of South of Brazil.

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An Ecological Monitoring Of The Plateau Pika And Its Impact On Grassland–An Experiment In The Yushu District, Qinghai Province Of China, Masahiro Tasumi, Nobumi Hasegawa, Akira Fukuda, Rende Song, Guomei Li, Jiahua Yang, Manabu Tobisa, Sachiko Idota Mar 2020

An Ecological Monitoring Of The Plateau Pika And Its Impact On Grassland–An Experiment In The Yushu District, Qinghai Province Of China, Masahiro Tasumi, Nobumi Hasegawa, Akira Fukuda, Rende Song, Guomei Li, Jiahua Yang, Manabu Tobisa, Sachiko Idota

IGC Proceedings (1977-2023)

The plateau pika (Ochotona curzoniae; see Fig.1 for photo) is a small mammal that lives in the alpine grasslands of the Tibetan Plateau. There are several uncertainties existing in the ecological behavior of the plateau pika and its impact on the alpine grasslands, and this impact has long been a subject under discussion. The mammal will have created both positive and negative impacts to the plateau environment and the alpine ecology. In China the plateau pika is regarded as a pest and has been a target of control or extermination because it is a competitor with livestock for …

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Soil Fertility Under Grassland Compared To Other Land Uses In Acid Soil Of Himachal Pradesh, India, Sharmistha Pal, Pankaj Panwar, D. R. Bhardwaj Mar 2020

Soil Fertility Under Grassland Compared To Other Land Uses In Acid Soil Of Himachal Pradesh, India, Sharmistha Pal, Pankaj Panwar, D. R. Bhardwaj

IGC Proceedings (1977-2023)

In the last decades severe changes in land use occurred in tropical countries, due to increasing population and their demand for food resources. Forest land is rapidly converted into agriculture or pastureland which may cause significant changes in soil fertility. Land-use exerts significant effect on nutrient availability and may also influence secondary succession and biomass production (Lu et al., 2002). Nutrient cycling in agroforestry is in between natural forest ecosystems of the tropics and most of the agricultural systems with are ‘‘leaky’’ having higher nutrient losses. Research indicated that decline of soil organic matter may occur due to conversion …

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Mix Cropping Of Smooth Vetch And Barley Under Cold Rainfed Conditions, Mahmoud Pouryousef, Khoshnood Alizadeh Mar 2020

Mix Cropping Of Smooth Vetch And Barley Under Cold Rainfed Conditions, Mahmoud Pouryousef, Khoshnood Alizadeh

IGC Proceedings (1977-2023)

Drylands are mainly used for wheat and food legumes production and there is increasing demand to forage crops in these areas. About 2-3 million hectares of arable lands across Iran are left as fallow every year (Alizadeh, 2010) which could be used to suitable forage crops. Considerable variation has been reported in herbage and grain yields of improved vetches (Vicia spp.) under Iranian rainfed conditions. Introduction of annual feed legumes in dryland cropping systems that are dominated by cereals would reduce pest and disease risk and increase sustainable productivity. However, vetch species as monocultures produce low forage yield under …

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Nitrate Accumulation And Utilization In Fodder Oats Varieties As Affected By Different Nitrogen Levels, Gurjeet Kaur, Meenakshi Goyal, Pritpal Singh Mar 2020

Nitrate Accumulation And Utilization In Fodder Oats Varieties As Affected By Different Nitrogen Levels, Gurjeet Kaur, Meenakshi Goyal, Pritpal Singh

IGC Proceedings (1977-2023)

Importance of fodder crops in agriculture needs no emphasis because of the fact that regular fodder availability is basic requirement for livestock production. The area under fodder in Punjab is 2.03 million hectares with total production of 45 million tons, which is not sufficient to meet the maintenance requirements of livestock. To improve the quality of milk production it is important that animals are fed with good quality of fodder. Nitrogen is an essential primary nutrient for plant growth and plays an important role in productivity of forage crops. The application of N at various growth stages is one of …

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Quality Of Grass Fodder Cowpea Mixtures As Influenced By Row Ratio, S. Lakshmi, M. R. Anita Mar 2020

Quality Of Grass Fodder Cowpea Mixtures As Influenced By Row Ratio, S. Lakshmi, M. R. Anita

IGC Proceedings (1977-2023)

A serious drawback of sustainable livestock production system in Kerala is the inadequate seasonal distribution of fodder production. The quantity and quality of herbage available in the lean dry months from January to May is very low. Therefore it is imperative to develop a fodder production system that increases the availability and improves the quality of herbage in the dry summer months. Intensive fodder production systems based on grasses are increasingly becoming important to the dairy farmers of Kerala. Development of compatible persistent grass legume mixtures could alleviate acute seasonal livestock feed deficiency in dry seasons (Njarui et al., 2004). …

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Ethical Use Of Cereal Legume Intercrop Forages For Feeding Of Sheep And Pasture Development, S. B. Maity, K. K. Singh, G. Prabhu, N. Das Mar 2020

Ethical Use Of Cereal Legume Intercrop Forages For Feeding Of Sheep And Pasture Development, S. B. Maity, K. K. Singh, G. Prabhu, N. Das

IGC Proceedings (1977-2023)

Cereal forages are important in the feeding of livestock for their high energy and dry matter content. However, they are low in protein content and inferior in other nutritional quality than the legume forages. Ruminants required protein as well as energy to maintain their production. Supplementation of protein through concentrates is cost effective in livestock production. Besides, ruminant is unique in having the potential for cycling forage materials, poor quality protein and non protein nitrogen sources into human food supply as meat and milk (Eskandary et al., 2009). Thus, management of forages for livestock feeding either in feedlot or in …

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Forage Legumes Intercropping And Nitrogen Management Effects On Performance Of Guinea Grass (Panicum Maximum) Varieties In Bundelkhand Region Of India, Mukesh Choudhary, G. Prabhu Mar 2020

Forage Legumes Intercropping And Nitrogen Management Effects On Performance Of Guinea Grass (Panicum Maximum) Varieties In Bundelkhand Region Of India, Mukesh Choudhary, G. Prabhu

IGC Proceedings (1977-2023)

Guinea grass (Panicum maximum Jacq.) is one of the important forage grass of the tropics with good yield potential, palatability, persistence and quality fodder (Sukhchain, 2010). The low crude protein productivity of guinea grass can be enhanced through its intercropping with forage legumes to sustain ruminant animals throughout the year. The intercropping of legumes with guinea grass will also optimize forage production per unit area, especially during rabi season. Further, its productivity can also be increased through N management as it is heavy feeder due to perennial and multi-cut nature.

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Estimating Δ15n And Δ13c In Barley And Pea Mixtures Using Near-Infrared Spectroscopy With Genetic Algorithm Based Partial Least Squares Regression, Hyo-Won Lee, Hyo-Jin Lee, Han-Jong Ko, Chang Yoon Mar 2020

Estimating Δ15n And Δ13c In Barley And Pea Mixtures Using Near-Infrared Spectroscopy With Genetic Algorithm Based Partial Least Squares Regression, Hyo-Won Lee, Hyo-Jin Lee, Han-Jong Ko, Chang Yoon

IGC Proceedings (1977-2023)

Stable isotope measurements have been increasingly used as a method to obtain information on relationships between plants and their environment (Dawson et al., 2002). Stable isotopes are seen as a powerful tool for advancing our knowledge on stock cycling and, nitrogen and carbon isotopic compositions have provided key insights into biogeochemical interactions between plants, soils and the atmosphere (Robinson, 2001). For the stable isotope measurements, the δ13C isotopic signature has been used successfully to disentangle physiological, ecological and biogeochemical processes and, δ15N studies have significantly improved our knowledge on nitrogen cycling pathways and nitrogen acquisition by …

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Nitrogen Use Efficiency Of Late Fall-Applied Urea And Pig Slurry For Regrowth Of Perennial Ryegrass Sward, Sang-Hyun Park, Tae-Hwan Kim, Bok-Rye Lee, Se-Jong Oh Mar 2020

Nitrogen Use Efficiency Of Late Fall-Applied Urea And Pig Slurry For Regrowth Of Perennial Ryegrass Sward, Sang-Hyun Park, Tae-Hwan Kim, Bok-Rye Lee, Se-Jong Oh

IGC Proceedings (1977-2023)

Pig slurry is the most important organic resource in Korea, as estimated to be more than 15% of recycled animal manure. The use of pig slurry as an alternative organic fertilizer is the most viable recycling option as it is produced in large amount on pig farms that has usually less or not surface for cultivation of forage crops in Korea. Perennial grasses in grassland system regrow successively after harvests by cutting or grazing. The regrowth yield at each harvest would be a crucial determinant for the productivity of sward. During vegetative regrowth, soil mineral N and N reserves meet …

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Productivity Of White Clover-Grass Mixed Swards, Aleksandrs Adamovics, Olga Adamovica Mar 2020

Productivity Of White Clover-Grass Mixed Swards, Aleksandrs Adamovics, Olga Adamovica

IGC Proceedings (1977-2023)

Dairy farming is a major branch of agriculture in Latvia. Therefore, providing livestock with high quality grass forage over the whole grazing season is of great importance. However, the cost of obtaining high quality grass forage should not be too high. Perennial forage legume-grass stands meets the required demands best of all. Inclusion of white clover in legume-grass stands contributes to the production of high quality herbage swards (Frame and Newbould, 1986; Laidlaw et al., 1995; Orr et al., 1990; Van Bockstaele, 1985). The nutritive value of white clover depends on the favorable leaf: stem ratio in total …

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Cenchrus Ciliaris And Stylosanthes Seabrana For Grassland Development In Semi-Arid Areas Of Maharashtra, Nandini Nimbkar, B. V. Nimbkar Mar 2020

Cenchrus Ciliaris And Stylosanthes Seabrana For Grassland Development In Semi-Arid Areas Of Maharashtra, Nandini Nimbkar, B. V. Nimbkar

IGC Proceedings (1977-2023)

A high proportion of grazing lands on the semi-arid Deccan plateau of Maharashtra, India are severely degraded and have experienced considerable loss of perennial vegetation and soil due to erosion. Consequently, these grazing lands have very low levels of pasture and animal productivity, water use efficiency is low and in combination these factors are threatening grazing systems of the local shepherd community. In Maharashtra 42% of the land is either covered with forest or scrub vegetation or left as culturable wasteland. Much of the efforts in land management have been directed towards forestry land with little attention given to private …

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