Eastern Washington University
USDA/NRCS/Tennessee
Department of Primary Industries and Regional Development, Western Australia
Kansas State University
Western Michigan University
Rice Biomass Response To Various Phosphorus Fertilizers In A Phosphorus-Deficient Soil Under Simulated Furrow-Irrigation,
2024
University of Arkansas, Fayetteville
Rice Biomass Response To Various Phosphorus Fertilizers In A Phosphorus-Deficient Soil Under Simulated Furrow-Irrigation, Jonathan B. Brye
Crop, Soil and Environmental Sciences Undergraduate Honors Theses
Wastewater-recovered phosphorus (P), in the form of the mineral struvite (MgNH4PO4⋅6H2O), may provide a sustainable alternative to rapidly decreasing rock phosphate reserves. Struvite can be generated via chemical and/or electrochemical precipitation methods, potentially reducing the amount of P runoff to aquatic ecosystems. The objective of this greenhouse tub study was to evaluate the effects of chemically- and electrochemically precipitated struvite (CPST and ECST, respectively) on above- and belowground plant response in a hybrid rice cultivar (Gemini 214, RiceTec) grown using furrow-irrigation compared to other common fertilizer-P sources [i.e., triple super phosphate (TSP) and diammonium phosphate (DAP)] in a P-deficient silt …
Laboratory Project 2 Temporary Surcharge Fill: Compaction Test,
2023
University of North Dakota
Laboratory Project 2 Temporary Surcharge Fill: Compaction Test, I-Hsuan Ho
AI Assignment Library
Using AI to help design a research plan and format an individual lab report for this project and discuss.
Fire Effects On Soil Organic Matter In The Creek Fire,
2023
California Polytechnic State University, San Luis Obispo
Fire Effects On Soil Organic Matter In The Creek Fire, Gracie E. Doolin
Master of Science in Environmental Sciences and Management Projects
Wildfires have increased in frequency and severity over the past few decades due to the increased concertation of CO2 emissions from anthropogenic influence. Soil carbon (C) sequestration has been identified as a climate change mitigation strategy; however, the influx of large-scale wildfires has accelerated landscape processes such as erosion, reducing soil aggradation, and soil C and nitrogen (N) protection. This trend is highlighted by the Creek Fire that occurred in September 2020 and burned 379,895 acres in the Sierra National Forest. This research is designed to close the knowledge gap regarding the impact of burn severity on soil organic matter …
Scaling Up Of Site Carbon Dynamics To Predict The Carbon Dynamics In Kazakhstan, Central Asia,
2023
USGS EROS Data Center
Scaling Up Of Site Carbon Dynamics To Predict The Carbon Dynamics In Kazakhstan, Central Asia, B. K. Wylie, Tagir Gilmanov, S. L. Stensaas, N. Z. Saliendra, D. A. Johnson, K. Akshalov, S. B. Frank, L. Zhang, R. F. Doyle, E. A. Laca, Montague W. Demment
IGC Proceedings (2001-2021)
Climate and management determine whether rangelands are net carbon sources or carbon sinks. Regional carbon dynamics of the Kazakh Steppe has not previously been documented. The objective of this study is to quantify the regional carbon flux dynamics of these extensive steppes.
A New System For Plant Experiments On Biodiversity Or Multi-Species Competition,
2023
University College Dublin, Ireland
A New System For Plant Experiments On Biodiversity Or Multi-Species Competition, John Connolly, L. Kirwan
IGC Proceedings (2001-2021)
Considerable discussion in recent years has focused on the design of competition and biodiversity experiments (Connolly et al., 2001a; Allison, 1999). Few agronomic experiments with >2 plant species have been conducted in greenhouse conditions (Gibson et al, 1999) or in the field (Connolly et al., 2001b). In many experiments the effects of density and initial species size have been confounded. The effects of species richness and evenness also are confounded frequently. The proposed system provides a framework of design and analysis, in which to address questions of function at community level and of structure and competition at …
Native Grasses Seeded Into A Cool-Season Pasture Encouraged By Low Resource Availability,
2023
University of Wisconsin-Madison
Native Grasses Seeded Into A Cool-Season Pasture Encouraged By Low Resource Availability, J. E. Doll, R. L. Cates, R. D. Jackson
IGC Proceedings (2001-2021)
Native prairie of the Upper Midwest, which was dominated by warm-season (C4) grasses, now exists as relatively small relict and restored patches (Curtis 1959). Re-introduction of natives into grazed agroecosystems would promote genetic, species, and landscape diversity. Extensive re-introduction of C4 grasses will require a shift away from the paradigm of maximizing production because C4 grasses have higher C:N ratios than C3 grasses rendering them inferior forage species. Nonetheless, there is great interest amongst the grazing community of the Upper Midwest in establishing native grasses as a means of improving wildlife habitat and increasing belowground …
The Ag-Biota Project: A Preliminary Assessment Of Potential Indicators Of Biodiversity In Agricultural Grasslands,
2023
University College Dublin, Ireland
The Ag-Biota Project: A Preliminary Assessment Of Potential Indicators Of Biodiversity In Agricultural Grasslands, Gordon Purvis, A. Anderson, A. J. Helden, L. Kirwan
IGC Proceedings (2001-2021)
In compliance with European commitments to the Convention on Biological Diversity, the conservation and enhancement of biodiversity within agricultural land is a primary objective of current agri-environmental measures. However, there is a widespread lack of information concerning the effectiveness of agri-environmental schemes in Europe, (Kleijn & Sutherland, 2003). In large part, this is due to uncertainties about selection of appropriate biological indicators of biodiversity (Buchs, 2003; Duelli & Obrist, 2003).
Effects Of Plant Species Diversity In Multifunctional Grasslands On Avian Communities,
2023
Dakota State University
Effects Of Plant Species Diversity In Multifunctional Grasslands On Avian Communities, K. K. Bakker, K. F. Higgins
IGC Proceedings (2001-2021)
Grasslands, planted or native sod, can provide multiple simultaneous functions (e.g., hay-forage production, biomass fuel products, bird nesting cover, soil and water conservation). Bird use of and abundance in grasslands is dependent on vegetation structure, size, and surrounding landscape (Bakker et al., 2002) but little is known about avian relationships to plant species diversity. We evaluated the relationship between plant species diversity and avian community structure in 5 grassland types. The results have application to grazing, haying, burning, and conservation practices applied to native and sown grassland stands and to conservation strategies for declining grassland bird populations.
Diversity And Adaptation Of Perennial Plants From North Africa: Legumes And Grasses,
2023
Ecole Nationale Supérieure Agronomique, Algeria
Diversity And Adaptation Of Perennial Plants From North Africa: Legumes And Grasses, Aissa Abdelguerfi, M. Laouar, K. Abbas, M. M'Hammedi Bouzina
IGC Proceedings (2001-2021)
A variety of climates, soil types and reliefs characterise North Africa (Algeria, Morocco, and Tunisia). These natural conditions have produced a large diversity of environments, landscapes, plant formations and flora. Several factors have contributed to the spread of a wide floristic variety: the influence of the Mediterranean in the north and in the north-east, the Atlantic in the west, and the Sahara in the south, as well as the presence of mountain ranges, particularly the Rif, the Tell Atlas, the Sahara Atlas, the Middle Atlas, the High Atlas, and the Anti-Atlas. This diversity of landscapes, environments and ecosystems has generated …
Comparison Of Compositional Changes In Multi-Species Grass/Legume Mixture Experiments Across Three Nordic Countries (Iceland, Sweden And Finland) Over Two Years,
2023
University College Dublin, Ireland
Comparison Of Compositional Changes In Multi-Species Grass/Legume Mixture Experiments Across Three Nordic Countries (Iceland, Sweden And Finland) Over Two Years, Caroline Brophy, Anne-Maj Gustavsson, A. Helgadottir, Oiva Nissinen, J. Connolly
IGC Proceedings (2001-2021)
A multi-site experiment was established at 39 sites across Europe, Australia and Canada within COST Action 852 to: (1) assess the benefits of grass/legume mixtures over monocultures, (2) test the stability of mixtures and (3) evaluate the consistency of the observed patterns over broad environmental gradients. This paper compares the results from 3 Nordic sites using the same plant species: Korpa Experimental Station in Iceland, Lapland Research Station in Finland and Piteå in Sweden to investigate if compositional changes in mixtures are consistent across the sites.
Site Effects On The Composition Of Multi-Species Grass/Legume Mixtures During Sward Establishment,
2023
IGER, UK
Site Effects On The Composition Of Multi-Species Grass/Legume Mixtures During Sward Establishment, Rosemary P. Collins, M. Fothergill, John Connolly
IGC Proceedings (2001-2021)
Under the auspices of COST Action 852, a multi-site experiment investigated issues of community structure, function and their interrelationships in multi-species grass/legume mixtures (Collins et al., 2004; Sebastià et al., 2004). We describe the effects of 2 contrasting sites on forage yield and species composition during sward establishment.
Unplanned Fires And Sustainability Of A Semi-Arid Rangeland In South Africa,
2023
University of the Free State, South Africa
Unplanned Fires And Sustainability Of A Semi-Arid Rangeland In South Africa, Hennie A. Snyman
IGC Proceedings (2001-2021)
Whether due to lightning or human negligence, large-scale unplanned fires affect large areas of the semi-arid southern African rangelands during the dormant winter (June-August) period (Everson 1999). These fires cause enormous fodder flow problems, and also influence ecosystem functioning (Snyman 2003). The short-term impact (2 years) of an unplanned fire on the sensitivity of above- and belowground productivity of a semi-arid rangeland was therefore investigated.
Effects Of Burning On Grassland Vegetation Cover On The Northeastern Side Of The Alborz Ranges In Iran,
2023
The Islamic Azad University, Iran
Effects Of Burning On Grassland Vegetation Cover On The Northeastern Side Of The Alborz Ranges In Iran, F. Amiri, M. R. Chaichi, A. Atrakchali
IGC Proceedings (2001-2021)
Golestan National Park is located on the northeastern side of the Alborz ranges, Golestan province, Iran. Because of the special vegetation cover and being located close to two wet and dry weather areas, this park is vulnerable to fire hazards. Between 1957 and 2004 more than 67 fires have been reported in the park. The international importance of the park requires a careful study on fire effects on vegetation cover, phytomass production, grass diversity and successional process after fires.
The Influence Of Tree Thinning And Subhabitat Differentiation On Panicum Maximum And Urochloa Mosambicensis Of A Bush Encroached Semi-Arid Savanna In South Africa,
2023
University of the Free State, South Africa
The Influence Of Tree Thinning And Subhabitat Differentiation On Panicum Maximum And Urochloa Mosambicensis Of A Bush Encroached Semi-Arid Savanna In South Africa, G. N. Smit
IGC Proceedings (2001-2021)
The productivity of grasses is most important for herbivores in extensive semi-arid savannas. In these areas an increase in woody plant abundance, commonly referred to as bush encroachment, suppresses grasses. This is the main reason why landowners often consider thinning or even total clearing of all woody plants. The aims of this study were to investigate the influence of different intensities of tree thinning and subhabitat differentiation on the grass layer of a semi-arid South African savanna.
The Effect Of Different Utilisation Methods On Composition Of Semi-Natural Grassland,
2023
Slovak Agricultural University, Slovakia
The Effect Of Different Utilisation Methods On Composition Of Semi-Natural Grassland, J. Jančovič, L'. Vozár, L'. Jančovičová
IGC Proceedings (2001-2021)
There has been much research on application of mineral fertilisers to permanent grasslands to maximise production of above-ground phytomass (Folkman & Jančovič 1990), but the changes arising after exclusion of fertilisers have not been studied in Slovak Republic up to now despite current interest in low input ststems. This paper reports on the effects of cessation of fertiliser inputs for an eight-year period.
Impact Of The Agricultural Use On The Biodiversity Of A Festuca Rubra Meadow,
2023
University of Agricultural Sciences and Medicine, Romania
Impact Of The Agricultural Use On The Biodiversity Of A Festuca Rubra Meadow, I. Rotar, F. Păcirar, R. Vidican, N. Sima
IGC Proceedings (2001-2021)
Technological inputs into meadow ecosystems trigger significant changes in the sward. In this paper we present the effect of organic and mineral fertilisation on the biodiversity of a Festuca rubra meadow.
Long-Term Effect Of Levels Of N-, P-, K-Supply On The Shannon-Index For Two Pastures Located In Central Germany,
2023
Justus-Liebig-University Giessen, Germany
Long-Term Effect Of Levels Of N-, P-, K-Supply On The Shannon-Index For Two Pastures Located In Central Germany, Judith F. Oerlemans, W. Opitz Von Boberfeld
IGC Proceedings (2001-2021)
Intensive grassland production, including the use of mineral fertilisers, has degraded the botanical diversity of grassland communities seriously (Chapman, 2001). There is little information on optimal amounts of soil nutrient availability to maintain/regenerate species-rich grassland communities. This study in Central Germany aimed to quantify the long-term effect of different N-, P-, K-supply combinations on biodiversity, expressed in terms of the Shannon-Index (Sh-Id), of 2 pastures classified as Lolio-Cynosuretum.
The Effect Of Npk Fertilisation On Structure And Species Composition Of Grasslands,
2023
Mendel University in Brno, Czech Republic
The Effect Of Npk Fertilisation On Structure And Species Composition Of Grasslands, Frantisek Hrabě, Jiří Skládanka
IGC Proceedings (2001-2021)
Long-term research into the effect of N+PK nutrition enables an objective evaluation of the trend and rate of succession and a prediction of changes including production development in permanent grassland (Hrabě et al., 1991). Former research (Hrabě & Halva, 1993) and evaluation within an eco-system concept (Rychnovská et al., 1994) demonstrated marked changes in the species composition of grass communities with the application of N+PK fertilisation that did not correspond to the sward type and site conditions.
Effect Of Aspect And Animal Movement On A Temperate Mountain Grassland Structure,
2023
NEIKER, Spain
Effect Of Aspect And Animal Movement On A Temperate Mountain Grassland Structure, Sorkunde Mendarte, I. Amezaga, Isabel Albizu, A. Ibarra, Iker Mijangos, M. Onaindia
IGC Proceedings (2001-2021)
Mountain pasture systems are maintained by the combination of physical and environmental factors and human activity leading to highly complex ecosystems (Watkinson & Ormerod 2000). Differences between pastures are usually due to physical conditions and animal pressure (Fynn & O´Connor 2000). In extensive livestock production systems in the Basque Country (northern Spain), livestock graze in mountain pastures from May until October. This study examined the effect of aspect and animal movement on grassland structure.
Plant Functional Types And Grazing Management In Mediterranean Grassland: An 11-Year Synthesis,
2023
Tel Aviv University, Israel
Plant Functional Types And Grazing Management In Mediterranean Grassland: An 11-Year Synthesis, Marcelo Sternberg, Zalmen Henkin, Avi Perevolotsky, M. Gutman, Eugene D. Ungar
IGC Proceedings (2001-2021)
Mediterranean ecosystems have high seasonality in resource availability, high year-to-year rainfall variability, many annual plants in the forage and a long history of grazing and disturbance. These facts, and results of previous studies (Sternberg et al., 2000) suggested that stocking rates could be increased above those of traditional grazing. However, the long-term effects of intensive grazing on the vegetation were not fully known. This study aimed to evaluate the responses of plant functional types (PFT) and community structure to different regimes of cattle grazing in Mediterranean grassland, particularly at high stocking rates.
