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| Registros recuperados: 65 | |
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| Pájaro, M.; Hansen, J.E.; Leonarduzzi, E.. |
| Engraulis anchoita northern stock reproductive biomass (SSB) during the 1993-2008 period was estimated applying the Daily Egg Production Method (DEPM) and accuracy of estimates assessed using a bootstrap technique (SW Atlantic Ocean, Argentine Sea). The basic data were collected in different research surveys carried out in late Spring, at the peak of the spawning season. The aim of this work was to build reliable confidence intervals around the estimates of the mean reproductive biomass applying a non-parametric bootstrap method. Resampling methods are becoming increasingly popular as statistical tools as they are robust and do not require the assumption of any particular distribution of the basic data. This is especially relevant when assessing the DEPM... |
| Tipo: Journal Contribution |
Palavras-chave: Spawning; Stocks; Fecundity; Biomass; Statistical analysis. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5494 |
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| Fontes,Paulo Cezar Rezende; Ronchi,Cláudio Pagotto. |
| The objective of this study was to establish critical values of the N indices, namely soil-plant analysis development (SPAD), petiole sap N-NO3 and organic N in the tomato leaf adjacent to the first cluster (LAC), under soil and nutrient solution conditions, determined by different statistical approaches. Two experiments were conducted in randomized complete block design with four repli-cations. Tomato plants were grown in soil, in 3 L pot, with five N rates (0, 100, 200, 400 and 800 mg kg-1) and in solution at N rates of 0, 4, 8, 12 and 16 mmol L-1. Experiments in nutrient solution and soil were finished at thirty seven and forty two days after transplanting, respectively. At those times, SPAD index and petiole sap N-NO3 were evaluated in the LAC. Then,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon esculentum; Nitrogen fertilizers; Plant soil relations; Statistical analysis. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002001000010 |
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| ÖZDEMIR,A.; ÖZDEMIR,A.Y.; YETISEN,K.. |
| ABSTRACT In this study, petiol anatomy of 17 Salvia sp. taxa were compared statistically. In all the studied taxa, some differences were found in the petiole shape, number of vascular bundles and the presence of chlorenchyma. Anatomical variations in 17 Salvia taxa have been investigated by means of numerical methods (Analysis of variance and Pearson correlation). By the analysis of the investigated taxa from 17 leaf anatomy related characters, it has been determined that epidermis width and trachea diameter are the best character pairs which represent the variations in them. It has been also found that the results from numerical analysis of the leaf anatomy characters can provide additional evidences that correspond to the anatomy for the recognition of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomy; Lamiaceae; Petiole; Salvia; Statistical analysis. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300465 |
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| Makambe, Godswill; Namara, Regassa E.; Hagos, Fitsum; Awulachew, Seleshi Bekele; Ayana, Mekonnen; Bossio, Deborah A.. |
| Agriculture is the most significant contributor to Ethiopia’s economy. Most of the agricultural production is under rainfed conditions and thus extremely sensitive to rainfall variability. Irrigation development, including smallholder irrigation, is used by the Ethiopian Government to attempt to mitigate the effects of rainfall variability. In this study, we look at smallholder irrigation - modern and traditional irrigation systems. A detailed description of the cropping patterns is given. The stochastic frontier production function approach is used to estimate technical inefficiency, and constraints to production are analyzed. Since the traditional system is found to be efficient but on a lower production frontier, the study shows that significant gains... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Rainfed farming; Irrigated farming; Efficiency; Irrigation schemes; Small scale systems; Cropping patterns; Crop production; Economic aspects; Statistical analysis; Agricultural and Food Policy; Crop Production/Industries; Production Economics. |
| Ano: 2011 |
URL: http://purl.umn.edu/118298 |
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| Makombe, Godswill; Namara, Regassa E.; Hagos, Fitsum; Awulachew, Seleshi Bekele; Ayana, Mekonnen; Bossio, Deborah A.. |
| Agriculture is the most significant contributor to Ethiopia’s economy. Most of the agricultural production is under rainfed conditions and thus extremely sensitive to rainfall variability. Irrigation development, including smallholder irrigation, is used by the Ethiopian Government to attempt to mitigate the effects of rainfall variability. In this study, we look at smallholder irrigation - modern and traditional irrigation systems. A detailed description of the cropping patterns is given. The stochastic frontier production function approach is used to estimate technical inefficiency, and constraints to production are analyzed. Since the traditional system is found to be efficient but on a lower production frontier, the study shows that significant gains... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Rainfed farming; Irrigated farming; Efficiency; Irrigation schemes; Small scale systems; Cropping patterns; Crop production; Economic aspects; Statistical analysis; Crop Production/Industries; Farm Management. |
| Ano: 2011 |
URL: http://purl.umn.edu/113012 |
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| David, Lorant; Toth, Geza; Kelemen, Nora; Kincses, Aron. |
| Észak-Magyarország három megyéje közül Borsod-Abaúj-Zemplén megyé-ben a legjelentősebb a magánszállásadás szerepe, a vendéglátók 50,5%-a találha-tó itt, Hevesben 41,6%-a, miközben Nógrád megyében 7,9%-a. Észak-Magyarország magánszállás férőhelyeinek eloszlása a 2005-ös adatokat vizsgálva területileg meglehetősen egyenlőtlen. A magánszálláshelyeken belül a 2005-ös adatok alapján a falusi szállásadás szálláshelyei 58%-ot tesznek ki, mellyel a régió eltér az országos megoszlástól. A legtöbb mutató vonatkozásában megállapítottuk, hogy a régió megyéinek falusi szállásadással, illetve magánszállásadással rendelkező települései társadalmi-gazdasági fejlettsége, illetve folyamatai sok tekintetben kedvezőtlenebbek az ilyen szállásadással rendelkező települések... |
| Tipo: Journal Article |
Palavras-chave: Vidéki turizmus; Falusi szállásadás; Fizetővendéglátás; Statisztikai elemzés; Versenyképesség; Countryside tourism; Village accommodation; Commercial hospitality; Statistical analysis; Competitiveness; Agricultural and Food Policy; Community/Rural/Urban Development. |
| Ano: 2007 |
URL: http://purl.umn.edu/57687 |
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| Sitko, Nicholas J.; Chapoto, Antony; Kabwe, Stephen; Tembo, Solomon; Hichaambwa, Munguzwe; Lubinda, Rebecca; Chiwawa, Harrison; Mataa, Mebelo; Heck, Simon; Nthani, Dorothy. |
| This technical compendium was developed to serve two interrelated purposes: 1.To assist in the development of USAID Zambia’s Feed the Future (FtF) strategy by providing a broad empirical analysis of the current conditions and historical trends shaping Zambia’s agricultural and food sector; and 2. To serve as a technical reference for organizations tasked with designing and implementing programs associated with FtF. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Zambia; Feed the Future; FtF; Statistical analysis; Agricultural and Food Policy; Food Security and Poverty; Research Methods/ Statistical Methods. |
| Ano: 2011 |
URL: http://purl.umn.edu/104016 |
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| Berlin, Christina; Erikson, Ljusk Ola. |
| The forest owner cooperatives in Sweden were established almost a century ago with the aim to improve the private forest owners’ bargaining situation and improve silviculture (the study, cultivation, and management of forest trees). The characteristics of today’s private forest owners and forest industry are changing, something which should encourage the forest owner cooperatives to consider adaptations of their organizations. The aims of this paper are, first, to describe characteristics of forest owner cooperative members and second, to probe the applicability of farm cooperative research in this venture. The statements that are tested are based on characteristics established in farm cooperative research and refer to (i) a negative relation between... |
| Tipo: Journal Article |
Palavras-chave: Private forest owners; Cooperative theory; Statistical analysis; Member’s age; Property size; Transaction; Agribusiness. |
| Ano: 2007 |
URL: http://purl.umn.edu/46580 |
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| Tavares,Laene de Fátima; Carvalho,André Mundstock Xavier de; Machado,Lucas Gonçalves. |
| ABSTRACT Experimental statistical procedures used in almost all scientific papers are fundamental for clearer interpretation of the results of experiments conducted in agrarian sciences. However, incorrect use of these procedures can lead the researcher to incorrect or incomplete conclusions. Therefore, the aim of this study was to evaluate the characteristics of the experiments and quality of the use of statistical procedures in soil science in order to promote better use of statistical procedures. For that purpose, 200 articles, published between 2010 and 2014, involving only experimentation and studies by sampling in the soil areas of fertility, chemistry, physics, biology, use and management were randomly selected. A questionnaire containing 28... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Statistical analysis; Means test; Misuse of statistics. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100307 |
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| Barbosa,Marcela Lúcia; Silva,Thieres George Freire da; Zolnier,Sérgio; Silva,Sérvulo Mercier Siqueira e; Ferreira,Williams Pinto Marques. |
| ABSTRACT The environmental factors that affect the morphological characteristics of different genera of cacti are little known. The aim of this study therefore was to analyse the contribution of environmental variables to growth in cladodes and plant of forage cactus clones of the genera Nopalea and Opuntia. The data used in this study were obtained from an experiment conducted in Serra Talhada, Pernambuco, Brazil, between 2012 and 2013, where the clones 'IPA Sertânia' (Nopalea), 'Miúda' (Nopalea) and 'Orelha de Elefante Mexicana' (Opuntia) were submitted to different irrigation depths (2.5, 5.0 and 7.5 mm) and fixed irrigation intervals (7, 14 and 28 days). Morphological characteristics of the cladodes and plants and weather variables were obtained over... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Statistical analysis; Nopalea sp; Opuntia sp; Weather variables. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300399 |
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| Possatto Junior, Omar; Bertagna, Filipe Augusto Bengosi; Peterlini, Edicarlos; Baleroni, Alessandra Guedes; Rossi, Robson Marcelo; Zeni Neto, Hugo. |
| Statistics is the main science by which researchers validate the results of scientific work, and the choice of an inadequate statistical method may lead to conclusions that are considered questionable by reviewers. This study had the objective of describing the characteristics of the statistical methods used in the papers published in Acta Scientiarum. Agronomy from 1998 to 2016 as part of a a critical analysis of the journal to pinpoint possible failures in the application of these methods. All scientific articles (n = 1,237) published in the journal were surveyed, of which 54.1% addressed areas of crop production. The mean comparison methods were the most commonly used (75.5%) and, consequently, they represented the highest proportion of errors (60.8%)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Statistical analysis; Comparison of means; Parametric methods; Revisão estatística. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42641 |
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| Azevedo, Camila Ferreira; Nascimento, Moysés; Fontes, Vitor Cunha; Silva, Fabyano Fonseca e; Resende, Marcos Deon Vilela de; Cruz, Cosme Damião. |
| GenomicLand is free software intended for prediction and genomic association studies based on the R software. This computational tool has an intuitive interface and supports large genomic databases, without requiring the user to use the command line. GenomicLand is available in English, can be downloaded from the Internet (https://licaeufv.wordpress.com/), and requires the Windows or Linux operating system. The software includes statistical procedures based on mixed models, Bayesian inference, dimensionality reduction and artificial intelligence. Examples of data files that can be processed by GenomicLand are available. The examples are useful to learn about the operation of the modules and statistical procedures. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Statistical analysis; Genomic analysis; Molecular markers; Biometrics.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/45361 |
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| Azevedo, Camila Ferreira; Nascimento, Moysés; Fontes, Vitor Cunha; Silva, Fabyano Fonseca e; Resende, Marcos Deon Vilela de; Cruz, Cosme Damião. |
| GenomicLand is free software intended for prediction and genomic association studies based on the R software. This computational tool has an intuitive interface and supports large genomic databases, without requiring the user to use the command line. GenomicLand is available in English, can be downloaded from the Internet (https://licaeufv.wordpress.com/), and requires the Windows or Linux operating system. The software includes statistical procedures based on mixed models, Bayesian inference, dimensionality reduction and artificial intelligence. Examples of data files that can be processed by GenomicLand are available. The examples are useful to learn about the operation of the modules and statistical procedures. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Statistical analysis; Genomic analysis; Molecular markers; Biometrics.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/45361 |
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| Kibar, Hakan; Igdir University; Öztürk, Turgut; Igdir University; Temizel, Kadir Ersin; Ondokuz Mayis University. |
| Selected engineering properties (physical and mechanical) of dry bean under non-irrigation and drip-irrigation were determined and compared. These properties are necessary for the design of equipments for harvesting, processing, transporting, estimating loads in storage structures for crops and flow problems in silos such as arching, ratholing, irregular flow and segregation. Some engineering characteristics such as: average length, width, thickness, the geometric mean diameter, sphericity, surface area, volume, thousand grain mass (M1000), bulk and true densities, porosity, angle of internal friction, static coefficient of friction, Poisson ratio and pressure ratio were studied. The highest average values for physical properties were recorded at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural Engineering dry bean; Physical properties; Mechanical properties; Statistical analysis. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19394 |
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| Registros recuperados: 65 | |
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