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| Registros recuperados: 18 | |
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| Leal,DHV; Faria Filho,DE de; Oliveira,EMB. |
| The objective of this study was to design a classification range of the coefficients of variation (CV) of traits used in experiments with eggtype Japanese quails (Coturnix coturnix japonica). The journal Revista Brasileira de Zootecnia was systematically reviewed, using the key word 'quail' during the period of January, 2000 to 2010. The CV of feed intake (g/bird/d), egg production (%/bird/d), egg weight (g), egg mass (g/bird/d), feed conversion ratio per dozen eggs (g/dozen), feed conversion ratio per egg mass (g/g), and egg specific gravity (g/mL) were collected. For each parameter, CV were classified using the following median (MD) and pseudo-sigma (PS) ratio as follows: low (CV < MD - PS), medium (MD - PS < CV < MD + PS), high (MD + PS < CV... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coturnix coturnix japonica; Experimental statistics; Experimental precision. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200014 |
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| Santos,Daniel; Lúcio,Alessandro Dal'Col; Cargnelutti Filho,Alberto; Storck,Lindolfo; Lorentz,Leandro Homrich; Schabarum,Denison Esequiel. |
| The objective of this work was to determine the efficiency of the Papadakis method on the quality evaluation of experiments with multiple-harvest oleraceous crops, and on the estimate of the covariate and the ideal plot size. Data from nine uniformity trials (five with bean pod, two with zucchini, and two with sweet pepper) and from one experiment with treatments (with sweet pepper) were used. Through the uniformity trials, the best way to calculate the covariate was defined and the optimal plot size was calculated. In the experiment with treatments, analyses of variance and covariance were performed, in which the covariate was calculated by the Papadakis method, and experimental precision was evaluated based on four statistics. The use of analysis of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum; Cucurbita pepo; Phaseolus vulgaris; Analysis of covariance; Papadakis method; Experimental precision. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000400257 |
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| Matei,Gilvani; Benin,Giovani; Storck,Lindolfo; Milioli,Anderson Simionato; Bozi,Antonio Henrique; Dalló,Samuel Cristian; Lucion,Ricardo Antonio. |
| ABSTRACT: The aim of this study was to evaluate the experimental precision of different methods of statistical analysis for trials with large numbers of soybean genotypes, and their relationship with the number of replicates. Soybean yield data (nine trials; 324 genotypes; 46 cultivars; 278 lines; agricultural harvest of 2014/15) were used. Two of these trials were performed at the same location, side by side, forming a trial with six replicates. Each trial was analyzed by the randomized complete block, triple lattice design, and use of the Papadakis method. The selective accuracy, least significant difference, and Fasoulas differentiation index were estimated, and model assumptions were tested. The resampling method was used to study the influence of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Resampling; Experimental precision; Experimental design; Selective accuracy. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000400202 |
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| Silva,Mauricio dos Santos da; Silva,Sebastião de Oliveira e; Donato,Sérgio Luiz Rodrigues; Sampaio Filho,Orlando Melo; Silva,Gilmara de Melo Araújo. |
| ABSTRACT: This study aimed to evaluate the optimum plot size for the papaya crop by using the modified maximum curvature method under soil and climatic conditions of the Recôncavo Baiano. The experiment comprised a uniformity test using the CNPMF-L78 strain developed by Embrapa Mandioca and Fruticultura, planted at a spacing of 3 m x 2 m, with 16 central rows and 22 plants per row, totaling 352 plants and an area of 2,112 m2. The following parameters were evaluated: plant height and diameter; height of insertion of the first fruits; precocity; number of commercial fruits per plant; productivity; length, diameter, weight, firmness, internal cavity diameter, pulp thickness, and soluble fruit solids. Each plant was considered as a basic unit, with an area of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya L.; Experimental precision; Uniformity.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000900204 |
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| Oliveira,Sérgio José Ribeiro de; Storck,Lindolfo; Lopes,Sidinei José; Lúcio,Alessandro Dal'Col; Feijó,Sandra; Damo,Henrique Perin. |
| Quality of field experiments data dependent upon adequate experimental design. This study investigated the relationship between the size of the basic unit for exploratory experiments and the optimum plot size, and the experiment precision with potato crop. Tuber yield of 24 rows, 144 mounds, were used to arrange experimental units of one, two, three, four, six, eight and 12 mounds. Tuber yield data of different mounds were used to arrange plot sizes with different numbers of basic units. The model CV(x)=A/X B was adjusted, in which CV(x) was the coefficient of variation among plots with different numbers of basic units. Optimum plot size was estimated with the modified maximum curvature method of the function CV(x)=A/X B, allowing completely random design.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum L.; Experiment arrangements; Quality control; Experimental precision. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000600012 |
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| Cargnelutti Filho,Alberto; Alves,Bruna Mendonça; Follmann,Diego Nicolau; Bem,Cláudia Marques de; Schabarum,Denison Esequiel; Stefanelo,Lucas da Silva; Wartha,Cleiton Antonio; Kleinpaul,Jéssica Andiara; Chaves,Gabriela Görgen; Uliana,Daniela Barbieri; Pezzini,Rafael Vieira. |
| ABSTRACT The objectives of this work were to determine the optimum plot size and number of repetitions to evaluate the fresh matter weight of vetch (Vicia sativa L.) in sowing densities. Fortyeight uniformity trials of 6 m × 6 m were conducted. Sixteen trials were evaluated in each sowing density (40, 60, and 80 kg∙ha−1). Each trial was divided into 36 basic experimental units (BEU) of 1 m × 1 m, totaling 1,728 BEU. In each BEU, the fresh matter was weighed. The optimum plot size was determined by the method of maximum curvature of the coefficient of variation model. The means were compared among sowing densities by the Scott-Knott’s test. The number of repetitions — for experiments with completely randomized and randomized block designs, in scenarios of i... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vicia sativa L.; Uniformity trials; Experimental design; Cover crops; Experimental precision. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000200178 |
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| Moraes, Bráulio Fabiano Xavier de; Toledo, Fernando Henrique Ribeiro Barroso; Dias, Kaio Olímpio das Graças; Andrade, Vinícius Teixeira; Ferreira, Daniel Furtado; Gonçalves, Flavia Maria Avelar. |
| In most cases, in genetic breeding of Arabica coffee, plot size is defined in an empirical manner. It is often based only on the experience of the breeders and the availability of resources, potentially leading to a reduction in precision. Therefore, the aim of this study was to estimate the size of the experimental plot for evaluation of coffee yield. We evaluated two experiments for validation of cultivars with 12 treatments set up in a randomized complete block design with three replicates and plots composed of 50 plants. Each plant was considered as a basic unit. Estimates of ideal plot size were made by maximum curvature of the coefficient of variation, linear-plateau segmented model and by the resampling methods. We discussed the variations in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic plant breeding; Experimental precision; Basic unit; Coffea arabica L.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42712 |
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| CELANTI,HUMBERTO FELIPE; SCHMILDT,OMAR; ALEXANDRE,RODRIGO SOBREIRA; CATTANEO,LAERCIO FRANCISCO; SCHMILDT,EDILSON ROMAIS. |
| ABSTRACT Were evaluated three characters in papaya seedlings 'Baixinho de Santa Amália' to estimate the optimum plot size and the number of replications in a completely randomized experiment, a randomized block and Latin square. The characters were seedling height, leaf number and length of roots from uniformity test with 240 seedlings. The determination of the optimum plot size was done by applying the method of Hatheway (1961). The number of seedlings per plot for seedling production is variable depending on the number of treatments and replications assumed precision, the character in question and the experimental design. Comparing designs, the plot size is greater in the Latin square, followed by a randomized block design and completely randomized, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya L.; Experimental precision; Experimental planning; Design experimental. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000300706 |
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| Cargnelutti Filho, Alberto; Silveira, Daniela Lixinski; Bubans, Valéria Escaio; Osmari, Bruno Fillipin; Somavilla, Felipe Manfio; Ortiz, Vithória Morena; Osmari, Lucas Fillipin. |
| Objectives of this work were to determine the sample size (number of plants) to estimate the mean of slender leaf rattlebox (Crotalaria ochroleuca) traits and investigate the relations among traits. In an experimental area of 8 m × 20 m (160 m2), at 147 days after sowing, 110 plants were randomly selected. The following traits were evaluated for each plant: plant height, stem diameter, number of nodes, number of leaves, leaf fresh matter, stem fresh matter, shoot fresh matter, leaf dry matter, stem dry matter and shoot dry matter. Measures of central tendency, variability, skewness and kurtosis were calculated. Normality was verified using the Kolmogorov-Smirnov test and the sample size was calculated to estimate the mean of the traits, assuming estimation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crotalaria ochroleuca; Sample sizing; Experimental precision; Correlation; Path analysis; Crotalaria ochroleuca; Dimensionamento amostral; Precisão experimental; Correlação; Aanálise de trilha. |
| Ano: 2022 |
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6834 |
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| Bandeira,Cirineu Tolfo; Fortes,Sabrina Kitina Giordano; Toebe,Marcos; Saifert,Luciano; Giacobbo,Clevison Luiz; Welter,Leocir José. |
| ABSTRACT: The aim of this research was to determine the sample size needed to estimate the average of wild passion fruit ( Passiflora caerulea ) traits. It was collected randomly, 133, 99 and 133 fruit of wild passion fruit in 30, 21 and 29 plants, located respectively, in the cities of São Borja, Itaqui and Uruguaiana, on the west border of Rio Grande do Sul, Brazil, totaling 365 fruits harvested in 80 plants. In each fruit were measured ten traits: width, length, fruit, skin, and pulp weight, pulp yield, luminosity and tone of skin and pulp. Then, central tendency, dispersion and distribution measures were calculated and the normality of the data checked. After, it was determined the sample size needed to estimate the average for each character, assuming... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wild passion fruit; Experimental precision; Experimental planning. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001729 |
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| TOEBE,MARCOS; MACHADO,LETÍCIA N.; TARTAGLIA,FRANCIELI L.; CARVALHO,JULIANA O. DE; BANDEIRA,CIRINEU T.; CARGNELUTTI FILHO,ALBERTO. |
| ABSTRACT The objective of this study was to determine the sample size necessary to estimate the mean and coefficient of variation in four species of crotalarias (C. juncea, C. spectabilis, C. breviflora and C. ochroleuca). An experiment was carried out for each species during the season 2014/15. At harvest, 1,000 pods of each species were randomly collected. In each pod were measured: mass of pod with and without seeds, length, width and height of pods, number and mass of seeds per pod, and mass of hundred seeds. Measures of central tendency, variability and distribution were calculated, and the normality was verified. The sample size necessary to estimate the mean and coefficient of variation with amplitudes of the confidence interval of 95% (ACI95%) of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crotalaria sp; Experimental precision; Number of pods; Resampling. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401705 |
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| Fritsche-Neto, Roberto; Universidade Federal de Viçosa; Vieira, Rafael Augusto; Universidade Estadual de Maringá; Scapim, Carlos Alberto; Universidade Estadual de Maringá; Miranda, Glauco Vieira; Universidade Federal de Viçosa; Rezende, Luciano Moreira; Universidade Federal de Viçosa. |
| The objective of this study was to update the ranking of the coefficients of variation (CVs) from maize experiments and evaluate the accuracy of the data from the latest Brazilian publications. We rank-ordered the CVs for grain yield, plant and ear heights, number of ears per plant, and weight of commercial ears, except for the weight of 100 grains. The data were obtained from 143 scientific papers published from 2005 to 2010. The classification was based on the average (m) and standard deviation (SD) and the CVs were ranked as low, intermediate, high and very high. All of the random variables had the CVs normally distributed. For most of the traits, we observed a large difference between the ranks from Scapim and Pimentel Gomes. In summary, the... |
| Tipo: Fieldwork; computacional analysis |
Palavras-chave: Experimental precision; Experimental design Genética e Melhoramento de Plantas; Fitotecnia 5.01.03.05-9; 5.01.03.05-8 experimental precision; Experimental design Produção Vegetal. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/13115 |
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| Registros recuperados: 18 | |
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