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| Registros recuperados: 30 | |
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| da Rosa Sarturi, Marlon Vinicius; Menegassi Bianchi Teixeira, Cleusa Adriane; Carvalho, Ivan Ricardo; Demari, Gustavo Henrique; Vieira Loro, Murilo; Pradebon, Leonardo Cesar; Donadel Port, Eduarda. |
| This study aimed to evidence the best arrangement of plants according to altitudes to potentialize corn grain yield. An information survey was performed in the 2019/20 harvest, using 144 producers responsible for corn grain production fields totaling 2,301.3 hectares in 144 environments of Rio Grande do Sul. Within 144 environments, 14 corn hybrids were arranged: DKB 240 PRO, DOW 2A620, AG 9045 PRO3, AS1555 PRO3, AS1572 PRO2, AS1656, BIOGENE 7046, DKB 250 PRO2, DKB 290 PRO3, DKB 330RR, NS56, P1630HX, P30F53HX, and SH7910. Yield, morphological, and phenological variables were measured, and geographic and meteorological information was collected. There is a positive influence on grain yield according to altitude and plant population characteristics. At lower... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Geographic variables; Principal components; Linear association; Zea mays; Variáveis geográficas; Componentes principais; Associação linear. |
| Ano: 2022 |
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/7070 |
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| Mendoza Mendoza, Moisés Gerardo. |
| El objetivo de este estudio fue determinar las diferencias fenotípicas en ovinos utilizando variables morfométricas en el crecimiento, la productividad y el rendimiento en canal. Se evaluaron 36 corderos de las razas Suffolk, Dorset y su cruza tomando en cuenta el sexo, se formaron seis tratamientos. Se realizó análisis de componentes principales (ACP) con 19 variables que interactuaron entre sí y cinco estaciones de medición (0, 10, 20, 35 y 60 días), los resultados sugieren que para una prueba de comportamiento productivo es necesario tener un manejo especial para cada fenotipo por la respuesta al ambiente. Se obtuvieron cinco grupos morfométricos utilizando la dependencia entre las variables; el grupo uno es representado por peso vivo, grupo dos... |
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Palavras-chave: Morfometría; Componentes principales; Fenotipos ovinos; Morphometry; Principal components; Sheep phenotypes; Ganadería; Maestría. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/558 |
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| Mendoza Mendoza, Moisés Gerardo. |
| El objetivo de este estudio fue determinar las diferencias fenotípicas en ovinos utilizando variables morfométricas en el crecimiento, la productividad y el rendimiento en canal. Se evaluaron 36 corderos de las razas Suffolk, Dorset y su cruza tomando en cuenta el sexo, se formaron seis tratamientos. Se realizó análisis de componentes principales (ACP) con 19 variables que interactuaron entre sí y cinco estaciones de medición (0, 10, 20, 35 y 60 días), los resultados sugieren que para una prueba de comportamiento productivo es necesario tener un manejo especial para cada fenotipo por la respuesta al ambiente. Se obtuvieron cinco grupos morfométricos utilizando la dependencia entre las variables; el grupo uno es representado por peso vivo, grupo dos... |
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Palavras-chave: Morfometría; Componentes principales; Fenotipos ovinos; Morphometry; Principal components; Sheep phenotypes; Ganadería; Maestría. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/558 |
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| Almeida Neto,Luiz A.; Pandorfi,Héliton; Moraes,Alex S.; Guiselini,Cristiane; C. Júnior,José J. Florentino. |
| ABSTRACT Sugarcane is considered one of the main alternatives for biofuel production and an important product of Brazilian agriculture, so it is indispensable to adopt new techniques for its cultivation and management. Thus, the present study aimed to evaluate the effect of the quality of supplemental lighting, based on light-emitting diode (LED), on the acclimation of pre-sprouted sugarcane seedlings in a protected environment. The experimental design was completely randomized, consisting of three supplemental LED lighting systems, with light proportions of 90% red + 10% blue (R:B 90/10), 80% red + 20% blue (R:B 80/20) and 70% red + 30% blue (R:B 70/30), and a control, with natural solar radiation, with 5 replicates. Multivariate principal component... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Principal components; Light-emitting diode; Supplemental lighting; Solar radiation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400410 |
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| Abreu,Flávia Barbosa; Silva,Derly José Henriques da; Marim,Bruno Garcia; Carneiro,Pedro Crescêncio Souza; Juhasz,Ana Cristina Pinto; De Luca,Carina A.C.; Valente,Reginaldo Fialho; Guimarães,Marcelo Almeida. |
| This study presents the minimum number and the best combination of tomato harvests needed to compare tomato accessions from germplasm banks. Number and weight of fruit in tomato plants are important as auxiliary traits in the evaluation of germplasm banks and should be studied simultaneously with other desirable characteristics such as pest and disease resistance, improved flavor and early production. Brazilian tomato breeding programs should consider not only the number of fruit but also fruit size because Brazilian consumers value fruit that are homogeneous, large and heavy. Our experiment was a randomized block design with three replicates of 32 tomato accessions from the Vegetable Germplasm Bank (Banco de Germoplasma de Hortaliças) at the Federal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon esculentum; Genetic resources; Principal components; Repeatability coefficient; Determination coefficient. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100021 |
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| Rahman, Tauhidur; Mittelhammer, Ronald C.; Wandschneider, Philip R.. |
| This paper attempts to provide a comprehensive analysis of interrelationships among the determinants of the Quality of Life (QOL). We show that various measures of well-being are highly sensitive to domains of QOL that are considered in the construction of comparative indices, and how measurable inputs into the well-being indicators are aggregated and weighted to arrive at composite measures of QOL. We present a picture of conditions among the 43 countries of the world with respect to such interrelated domains of QOL as the relationship with family and friends, emotional well-being, health, work and productivity, material well-being, feeling part of one's community, personal safety, and the quality of environment. On the basis of Borda Rule and the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Quality of life; Domains; Borda rule; Principal components; And rankings; Institutional and Behavioral Economics; I31; D60; D63. |
| Ano: 2003 |
URL: http://purl.umn.edu/22045 |
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| Dreger, Christian; Schumacher, Christian. |
| This paper discusses a large-scale factor model for the German economy. Following the recent literature, a data set of 121 time series is used via principal component analysis to determine the factors, which enter a dynamic model for German GDP. The model is compared with alternative univariate and multivariate models. These models are based on regression techniques and considerably smaller data sets. Out-of-sample forecasts show that the prediction errors of the factor model are smaller than the errors of the rival models. However, these advantages are not statistically significant, as a test for equal forecast accuracy shows. Therefore, the efficiency gains of using a large data set with this kind of factor models seem to be limited. Diese Arbeit... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Factor models; Principal components; Forecasting accuracy; International Development; E32; C51; C43. |
| Ano: 2002 |
URL: http://purl.umn.edu/26321 |
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| Silva,Samuel de Assis; Lima,Julião Soares de Souza. |
| The spatial variability of soil and plant properties exerts great influence on the yeld of agricultural crops. This study analyzed the spatial variability of the fertility of a Humic Rhodic Hapludox with Arabic coffee, using principal component analysis, cluster analysis and geostatistics in combination. The experiment was carried out in an area under Coffea arabica L., variety Catucai 20/15 - 479. The soil was sampled at a depth 0.20 m, at 50 points of a sampling grid. The following chemical properties were determined: P, K+, Ca2+, Mg2+, Na+, S, Al3+, pH, H + Al, SB, t, T, V, m, OM, Na saturation index (SSI), remaining phosphorus (P-rem), and micronutrients (Zn, Fe, Mn, Cu and B). The data were analyzed with descriptive statistics, followed by principal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica L; Precision agriculture; Principal components; Cluster analysis. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200016 |
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| Buss,Ricardo N.; Silva,Raimunda A.; Siqueira,Glécio M.; Leiva,Jairo O. R.; Oliveira,Osmann C. C.; França,Victor L.. |
| ABSTRACT The objective of this study was to evaluate the spatial variability of soybean yield, carbon stock, and soil physical attributes using multivariate and geostatistical techniques. The attributes were determined in Oxisols samples with clayey and cohesive textures collected from the municipality of Mata Roma, Maranhão state, Brazil. In the study area, 70 sampling points were demarcated, and soybean yield and soil attributes were evaluated at soil depths of 0-0.20 and 0.20-0.40 m. Data were analysed using multivariate analyses (principal component analysis, PCA) and geostatistical tools. The mean soybean yield was 3,370 kg ha-1. The semivariogram of productivity, organic carbon (OC), and carbon stock (Cst) at the 0-0.20 m layer were adjusted to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Management zones; Geostatistics; Principal components. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000600446 |
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| Batista,Pedro H. D.; Almeida,Gledson L. P. de; Pandorfi,Héliton; Melo,Airon A. S. de; Moraes,Alex S.; Guiselini,Cristiane. |
| ABSTRACT The objective of this study was to evaluate the thermal effect on the behavioral and physiological changes of Girolando heifers by means of principal components analysis. The research was conducted in the Agreste region of the state of Pernambuco, Brazil. Three heifers submitted to the continuous grazing system were used. For the determination of the thermal effect on the animals, the variables dry bulb temperature and relative air humidity were recorded, which allowed to determine the temperature and humidity index and the specific enthalpy. The physiological variables monitored were the respiratory rate, rectal temperature and skin temperature. The quantified behavioral indicators were walking, drinking, eating, ruminating and leisure, to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Principal components; Animal thermal comfort; Animal adaptability. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000400303 |
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| Martuscello,Janaina Azevedo; Braz,Thiago Gomes dos Santos; Jank,Liana; Cunha,Daniel de Noronha Figueiredo Vieira da; Fonseca,Dilermando Miranda da. |
| The objective of this experiment was to evaluate the genetic divergence between hybrids obtained from 10 sexual genitors of the Panicum maximum breeding program at Embrapa Beef Cattle. For this, the following morphological descriptors were used: plant height, growth habit, leaf aspect, leaf waxiness, hair density on the sheath (DePB) and blade (DePL), degree of hardiness of the hairs on the leaf sheath (DuPB) and blade (DuPL) and length of hairs on the sheath and blade. The characteristics growth habit and waxiness were not included in the analysis for being invariant. The phenotypic correlations were low and, therefore, not used to eliminate variables. By the principal component analysis, an 84.3% accumulation of the variation was observed until the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Discriminating analysis; Optimization method; Principal components; Relative importance of the characteristics; Tocher. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900002 |
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| Cândido,Ebson Pereira; Pimenta Filho,Edgard Cavalcanti; Gonzaga Neto,Severino; Santos,Edson Mauro; Moura,José Fábio Paulino de; Bispo,Safira Valença. |
| The objective of this study was to characterize the sorghum farming and ensiling systems in the Cariri region of Paraíba State (Brazil), and to identify different groups of producers based on productive characteristics using frequency distributions, and principal component and cluster analyses. A total of 100 milk producers in the Caturité and Boqueirão municipalities in the dairy region of Cariri, Paraíba, were selected to fill out a questionnaire comprised of 32 questions to collect data on both qualitative and quantitative variables. Of the 100 properties studied, 88% cultivated sorghum as silage forage for feeding dairy cows, demonstrating the importance of this cultural practice in the region of Cariri. Statistical analyses based on the variables... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Principal components; Semi-arid; Sorghum bicolorL. Moench. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000600336 |
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| Silva,Geruza Cardoso da; Carvalho,Cinara da Cunha Siqueira; Costa,Maria Dulcinéia da; Rocha,Raul Herberth Freitas; Menezes,Jordana Carvalho de; Aspiazú,Ignacio; Fonseca,Jéssica Duarte Ramos; Santos,Hugo Pereira. |
| ABSTRACT The objective of this study was to evaluate the effect of the trainer and the adopted daily work on the behavior and performance of horses of the Mangalarga Marchador breed on a horse farm and in racetracks in northern Minas Gerais State, Brazil. Twenty equines and nine trainers from four farms and three competition events of the breed were observed. The experiment was divided into two stages. In the first stage, the animals were observed together with their trainer on the farm, during the daily work, and the behavior reactions were recorded based on scores. The duration of training and the behavior told by the trainer of the animal were recorded in scores. The second stage happened in three competitions of the breed in agricultural fairs. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Equines; Factorial analysis; Principal components; Specialized competitions; Trainers. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100513 |
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| Leite,Wallace de Sousa; Unêda-Trevisoli,Sandra Helena; Silva,Fabiana Mota da; Silva,Alysson Jalles da; Mauro,Antonio Orlando Di. |
| ABSTRACT The selection of superior genotypes of soybean is a complex process, thus exploratory multivariate techniques can be applied to select genotypes analyzing the agronomic traits altogether, increasing the chance of success of a breeding program. Thus, the objective of this study was to select soybean genotypes carrying the RR gene with good agronomical performance through of multivariate analysis and selection index and identify those traits that influence, also verifying the agreement of multivariate techniques and selection index in the selection process. The experiment was conducted in an increased block experimental being evaluated 227 genotypes of F5 generation, which 85 of those were detected to be glyphosate-resistant by PCR. The following... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Clustering analysis; Principal components; Selection gain; Grain Yield. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300491 |
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| Pereira,Walter Esfrain; Siqueira,Dalmo Lopes de; Puiatti,Mario; Martínez,Carlos Alberto; Salomão,Luiz Carlos Chamhum; Cecon,Paulo Roberto. |
| Plants present different degrees of adaptation to aluminium (Al) concentrations in the soil, and the understanding of this characteristic can lead to a viable option for the utilization of acid soils. The objective of this experiment was to evaluate the effects of five Al concentrations (0, 50, 100, 200, and 400 mumol L-1) on the growth of 'Rangpur' lime (Citrus limonia Osbeck) and 'Volkamer' lemon (Citrus volkameriana Hort. ex Tan.), and tangerine rootstocks 'Cleópatra' (Citrus reshni Hort. ex Tan) and 'Sunki' (Citrus sunki Hort. ex Tan.), in hydroponic culture. The treatments were arranged in a randomized block design, with four replications. For all rootstocks, the relative growth rate in terms of plant total fresh matter increased under low and,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrus sp.; Relative growth rate; Principal components; Nutrient solution. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100006 |
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| Registros recuperados: 30 | |
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