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| Registros recuperados: 17 | |
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| Coan,Ruchele M.; Turco,José E. P.; Pivetta,Kathia F. L.; Costa,Madson N. da; Mateus,Caroline de M. D'A.. |
| With this study, the objective was to estimate the photosynthetically active radiation (PAR) and to correlate it with the dry matter (MMSPA) of the emerald zoysia (Zoysia japonica Steud.) on surfaces with different expositions and slopes. The research was conducted at the Experimental Watershed of the Agricultural Engineering Department, School of Agriculture and Veterinary Sciences of São Paulo State University (FCAV/UNESP), Brazil, where the surfaces (H, 10 N, 30 N, 50 N, 10 S, 30 S, 50 S, 10 L, 30 L, 50 L, 10 O, 30 O and 50 O) were used. To obtain the global solar radiation, it was installed an automated weather station where the PAR (dependent variable) was obtained by the equation y = a + bx, and the global radiation was independent. To compare means... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zoysia japonica; Slope; Solar radiation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000300009 |
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| Sultan, Nabil; Marsset, Bruno; Ker, Stephan; Marsset, Tania; Voisset, Michel; Vernant, Antoine-mathieu; Bayon, Germain; Cauquil, Eric; Adamy, J.; Colliat, J. L.; Drapeau, D.. |
| Based on acquired geophysical, geological and geotechnical data and modeling, we suggest hydrate dissolution to cause sediment collapse and pockmark formation in the Niger delta. Very high-resolution bathymetry data acquired from the Niger delta reveal the morphology of pockmarks with different shapes and sizes going from a small ring depression surrounding an irregular floor to more typical pockmarks with uniform depression. Geophysical data, in situ piezocone measurements, piezometer measurements and sediment cores demonstrate the presence of a common internal architecture of the studied pockmarks: inner sediments rich in gas hydrates surrounded by overpressured sediments. The temperature, pressure and salinity conditions of the studied area have allowed... |
| Tipo: Text |
Palavras-chave: Methane gas hydrate; Sea floor; Marine sediments; Pore pressure; Porous media; Continental margin; Clathrate hydrate; Fluid flow; Stability; Slope. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00012/12300/9092.pdf |
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| Vera,Leonardo; Montalba,René; Vieli,Lorena; Jorquera,Emilio; González,Isabel. |
| L. Vera, R. Montalba, L. Vieli, E. Jorquera, and I González. 2015. Methodology for determining the suitability of land for the cultivation of highbush blueberry: a case study on a farm in southern Chile. Cien. Inv. Agr. 42(3): 353-364. The selection of good planting sites is critical for the success of blueberry plantations. The objective of the present study was to identify farm territorial units suitable for the establishment and management of highbush blueberry crops on a farm in southern Chile. A farm-level characterization was developed, and districts and sites were classified according to their receptive capacity. Numerical suitability valúes were subsequently obtained for each land unit identified on the farm. Four suitability categories were... |
| Tipo: Journal article |
Palavras-chave: Landscape management; Limiting variable; PH; Receptive capacity; Slope. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000300004 |
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| Cunha,João P. B.; Silva,Fabio M. da; Andrade,Ednilton T. de; Carvalho,Luis C. C.. |
| ABSTRACT In super-mechanized coffee harvesting system, all operations are performed mechanically. In order to improve the logistics of mechanized agricultural operations, the knowledge on the variables that affect the operational performance can generate models to accurately estimate these parameters. The use of response surface methodology (RSM) allows to verify the influence of different independent variables and the generated response to allow for a great value. This study aimed to verify, using RSM, the influence of speed, mean length of rows and the slope of the areas on the operational performance parameters in different mechanized operations in coffee production, such as: harvest, sweeping and gathering. The results show that the slope directly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mechanization; Slope; Mean error; Mechanical harvesting. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001000946 |
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| Caten,Alexandre Ten; Dalmolin,Ricardo S. D.; Boeing,Evandro L.; Vitalis,Fernando A.; Silva,Walquíria C. Da. |
| ABSTRACT: Relief characterization using a digital terrain model (DTM) is widely applied in erosion, soil and vegetation modeling. However, factors, such as acquisition technology and the spatial resolution of the digital model, affect modeling results. The aim of this study was to characterize noises in a DTM of the entire state of Santa Catarina recently made available through the state's Sustainable Economic Development Secretary and to evaluate different methods of interpolation and smoothing of the original 1 m resolution to a new digital model with a spatial resolution of 15 m. Using the SAGA GIS program, spurious data that appeared as peaks and sinks were removed from the digital model. Of five processing procedures, the following three were used for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digital elevation model; Geomorphometry; Slope; Digital soil mapping; Aerial imagery. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601261 |
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| Counts, John; Jorry, Stephan; Leroux, Estelle; Miramontes, Elda; Jouet, Gwenael. |
| Recently acquired data from the Iles Eparses (southwestern Indian Ocean) reveal new information about the geomorphology, depositional processes, and sedimentary deposits on the slopes of atolls and atoll-like platforms. The deposits discussed here lie on the deepwater flanks of isolated, inactive volcanos that are capped by shallow, relatively flat carbonate platforms 45–210 km2 in area. Much of the slope geomorphology is controlled by the underlying volcanic edifice. Steep (~25–35°) upper slopes consist of outcrops of volcanic basement, smooth banks, failure scarps, and channels. Sedimentary features seen in the lower slope and proximal basin (2000–3500 m deep) consist of channels, levees, lobes, and mass transport deposits (MTDs). In places, channels... |
| Tipo: Text |
Palavras-chave: Atoll; Carbonate; Indian Ocean; Slope; Deepwater sediments. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00450/56136/57802.pdf |
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| Lee,K. H.; Won,H. J.; Kim,S. N.; Yoo,S. H.; Shin,I. S.; Shin,K. H.; Hong,S. H.; Lee,S. H.; Min,H. K.; Park,S. N.; Hur,S. J.. |
| In Korea, antivenoms for the treatment of patients bitten by venomous snakes have been imported from Japan or China. Although there is cross-reactivity between these antibodies and venoms from snakes indigenous to Korea (e.g. Agkistrodon genus), protection is not optimal. Antivenoms specifically prepared to neutralize Korean snake venoms could be more effective, with fewer side effects. To this end, we established an infrastructure to develop national standards and created a standardized method to evaluate the efficacy of two horse-derived antivenoms using mouse lethal toxin test. Additionally, we determined the antivenoms neutralizing activity against lethal doses (LD50) of Agkistrodon halys (from Japan) and Jiangzhe Agkistrodon halys (from China) venoms.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anti-lethal toxin potency; Jiangzhe Angkistrodon halys; Lethal activity; Probit analysis; Slope. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000400004 |
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| Tavares,Rose Luiza Moraes; Spokas,Kurt; Hall,Kate; Colosky,Edward; Souza,Zigomar Menezes de; Scala,Newton La. |
| ABSTRACT Mechanized sugarcane harvest is replacing the historic practice of field burning, due to environmental concerns of the particulate and emissions during burning. However, the impact of these practices on soil greenhouse gas (GHG) production potential is not fully known. Thus, the present work quantified the potential production, in 1 g of soil, of greenhouse gases (GHG) in three systems of sugarcane management. The systems were: area with a history of burning sugarcane before harvest (B) and another with two systems of management of “green sugarcane” in two periods of implantation - 5 (G-5) and 10 years (G-10). A laboratory incubation experiment was used to assess the production potentials of carbon dioxide (CO2), nitrous oxide (N2O) and methane... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sacharium officinarium; Slope; CO2; N2O; CH4.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000200195 |
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| Reveillaud, J; Freiwald, A; Van Rooij, D; Le Guilloux, Erwan; Altuna, A; Foubert, A; Vanreusel, A; Olu, Karine; Henriet, J. |
| Studies on the distribution of scleractinian corals in the Bay of Biscay were relatively numerous during the nineteenth and the first half of the twentieth century. Yet, recent reports are scattered, sometimes unpublished, and therefore knowledge about the current coral occurrence in the area is limited. This study aims at compiling the available historical and more recently collected information on the occurrence of scleractinian corals in the Bay of Biscay. Data from two recent cruises are included and compared with previous explored coral sites from as early as 1830 up to 1995. A database of 347 records including 34 described species of scleractinians highlights that the slope of the Bay of Biscay is an important habitat for scleractinians. This could... |
| Tipo: Text |
Palavras-chave: Biodiversity; Bay of Biscay; Slope; Scleractinia; Cold water corals. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4503.pdf |
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| Boisot, Olivier; Nouguier, Frederic; Chapron, Bertrand; Guerin, Charles-antoine. |
| We introduce a practical and accurate model, referred to as "GO4," to describe near-nadir microwave scattering from the sea surface, and at the same time, we address the issue of the filtered mean square slope (mss) conventionally used in the geometrical optics model. GO4 is a simple correction of this last model, taking into account the diffraction correction induced by the rough surface through what we call an effective mean square curvature (msc). We evaluate the effective msc as a function of the surface wavenumber spectrum and the radar frequency and show that GO4 reaches the same accuracy as the physical optics model in a wide range of incidence and frequency bands with the sole knowledge of the mss and msc parameters. The key point is that the mss... |
| Tipo: Text |
Palavras-chave: Curvature; Geometrical optics; Near-nadir; Ocean radar sensing; Slope. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00277/38789/37537.pdf |
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| Fauquembergue, Kelly. |
| Over the past decade, the Little Bahamas Bank (LBB) in the Caribbean has been at the heart of oceanographic cruises Carambar (2010), Caramba 1.5 (2014) and Carambar 2 (2016-2017). These scientific expeditions were carried out with the aim of improving our knowledge of the processes that controlled sediment export during the Quaternary in this tropical setting. Thus, bathymetric data covering some 24,270 km² of seabed, high-resolution seismic lines running over 6,398 km and 42 sediment cores ranging from 177 to 4,873 m water depth were collected in the upper slope through to the abyssal plane of the LBB system. This study focusses on those sediment cores retrieved in the upper (Carambar 1.5) and lower slope of the LBB and those from the Great Canyon... |
| Tipo: Text |
Palavras-chave: Bahamas; Pente; Cabonates; Ouragans; Fronts froids; Bahamas; Slope; Carbonates; Hurricanes; Cold Fronts. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00684/79601/82297.pdf |
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| Santos, Carlos Antônio dos; Carmo, Margarida Goréte Ferreira do; Bhering, Aline da Silva; Costa, Evandro Silva Pereira; Amaral Sobrinho, Nelson Moura Brasil do. |
| The effects of the dose and application method of limestone - broadcast or in furrow - and of agricultural gypsum on soil fertility, the control of clubroot, and cauliflower development in mountain farming areas were evaluated. Initially, four doses of broadcast limestone (0.0, 1.0, 2.0, and 4.0 Mg ha-1) and two cauliflower cultivars (Sharon and Piracicaba Precoce) were analyzed. A second experiment evaluated limestone (4.0 Mg ha-1) application treatments: broadcast and in furrow, broadcast limestone + gypsum (3.0 + 1.0 Mg ha-1), and broadcast gypsum (1.0 Mg ha-1). Soil fertility was improved, and significant increases were observed in the total and healthy root volume with increasing doses of limestone. With 4.0 Mg ha-1, a 58 and 85% increase in yield was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica oleracea var. botrytis; Plasmodiophora brassicae; Liming; Slope; Application method. Brassica oleracea var. botrytis; Plasmodiophora brassicae; Liming; Slope; Application method.. |
| Ano: 2020 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42494 |
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| Brunini,Rodrigo G.; Turco,José E. P.. |
| ABSTRACT Sugarcane (Saccharum officinarum L.) is a crop of vital importance to Brazil, in the production of sugar and ethanol, power generation and raw materials for various purposes. Strategic information such as topography and canopy temperature can provide management technologies accessible to farmers. The objective of this study was to determine water stress indices for sugarcane in irrigated areas, with different exposures and slopes. The daily water stress index of the plants and the water potential in the soil were evaluated and the production system was analyzed. The experiment was carried out in an “Experimental Watershed”, using six surfaces, two horizontal and the other ones with 20 and 40% North and South exposure slopes. Water stress level was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water stress; Leaf temperature; Slope; Water and soil management. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001000925 |
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| Registros recuperados: 17 | |
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