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Ajuste do rendimento para a variação do estande em experimentos de melhoramento genético do feijão Repositório Alice
PIANA, C.F. de B.; SILVA, J.G.C. da; ANTUNES, I.F..
O objetivo deste trabalho foi avaliar o ajuste do rendimento pela variação do estande em experimentos de feijão e propor procedimento para ajustamento por análise de co-variação. Utilizaram-se dados de 33 ambientes do Ensaio Estadual de Feijão do Rio Grande do Sul. Realizaram-se as análises de variação e de co-variação de rendimento e de estande em cada ambiente. Foram considerados quatro modelos de ajustamento alternativos: sem ajuste para a variação do estande; com ajuste para o estande médio geral; com ajuste para os estandes médios dos genótipos; e com ajuste para os estandes médios dos grupos de genótipos. Em 70% dos ambientes, ocorreu efeito linear ou quadrático significativo de estande sobre rendimento e em 85% efeito significativo de genótipo sobre...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Phaseolus vulgaris; Análise de co-variação; Precisão experimental; Validade do experimento; Covariance analysis; Experimental precision; Validity of the experiment.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/122841
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Ajustes de quadrado médio do erro em ensaios de competição de cultivares de milho pelo método de Papadakis. Repositório Alice
CARGNELUTTI FILHO, A.; STORCK, L.; LÚCIO, A.D..
O objetivo deste trabalho foi avaliar as diferentes formas de calcular o índice de produtividade, usado como covariável pelo método de Papadakis, e verificar se este método é eficiente para aumentar a precisão experimental nos ensaios de competição de cultivares de milho (Zea mays L.) com grande número de tratamentos. Em relação ao rendimento de grãos, procedeu-se a verificação das pressuposições do modelo matemático, a análise da variância no delineamento de blocos ao acaso e a análise de covariância no delineamento inteiramente casualizado, usando como covariável o índice de produtividade estimado por cinco formas (método de Papadakis). A comparação da análise convencional (blocos ao acaso) com a análise pelo método de Papadakis foi realizada com base...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Zea mays; Fasoulas; Precisão experimental; Fasoulas; Experimental precision.
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/handle/doc/108979
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Classification of the coefficients of variation for sugarcane crops Ciência Rural
Couto,Mauricio Farias; Peternelli,Luiz Alexandre; Barbosa,Márcio Henrique Pereira.
The objective of this paper was to evaluate the range of classification of variation coefficient in experiments with sugarcane. For this study, some of the variables that are mostly used by researchers of the culture were considered. The data was obtained after extensive bibliographical revision from scientific journals, data base from the improvement program of sugarcane from the Federal University of Viçosa, master dissertations, doctorate thesis and technical reports. Classification ranges were proposed according to the Costa method, in which is based the use of a median and pseudo-sigma. The variables tons of stalks per hectare and tons of pol per hectare presented the highest ranges of the classification of the coefficients of variation, while the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Saccharum spp; Experimental precision; Experimental error.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000600003
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Classification of the coefficients of variation of parameters evaluated in Japanese quail experiments Rev. Bras. Ciênc. Avic.
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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Coeficiente de heterogeneidade do solo e tamanho de parcela. Repositório Alice
ALVES, S.M. de F.; SERAPHIN, J.C..
O objetivo deste trabalho foi apresentar alternativas para estimar o coeficiente de heterogeneidade do solo a partir do coeficiente de correlação intraclasse em diferentes estruturas de delineamentos experimentais. As estimativas dos coeficientes de heterogeneidade do solo obtidas por este método foram comparadas àquelas obtidas por meio de mínimos quadrados generalizados. Não houve diferenças entre as estimativas obtidas por ambos os métodos; nesse caso recomenda-se a estimativa com base no coeficiente de correlação intraclasse por ser mais simples e prática. Considerando-se o coeficiente de heterogeneidade do solo, obteve-se diversos tamanhos de parcela, para diferentes combinações de coeficiente de variação, número de repetições, grau de diferença que...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Coeficiente de correlação intraclasse; Precisão experimental; Delineamento experimental; Coeficiente de variação; Intraclass correlation coefficient; Experimental precision; Experimental design; Variation coefficient.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/110071
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Effect of neighborhood and plot size on experiments with multiple-harvest oleraceous crops PAB
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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Experimental planning for the evaluation of phenotipic descriptors in banana Rev. Bras. Frutic.
Donato,Sérgio Luiz Rodrigues; Silva,João Abel da; Guimarães,Bruno Vinícius Castro; Silva,Sebastião de Oliveira e.
Abstract This work aimed to subsidize experimental planning for the evaluation of phenotypic characters in banana. The experiment consisted of a uniformity trial with Tropical cultivar spaced of 3 m x 2 m, in a useful area with nine rows of 40 plants. Vegetative and yield aspects were evaluated in two production cycles. Plants and basic units (UB) were combined to form various plot sizes, from which the variation coefficient and the soil heterogeneity index were estimated. To define the experimental design, the Hatheway method was used. Variability, resulting from the soil anisotropy and other factors such as desuckering cultural practice increases between mother plant and daughter plant cycles, with effects on experimental design. The variation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plot size; Experimental precision; Musa spp.; Agricultural characters.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000500501
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Methods of analysis and number of replicates for trials with large numbers of soybean genotypes Ciência Rural
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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Métodos de correção da produtividade de grãos de milho relacionados à adaptabilidade e estabilidade de cultivares. Repositório Alice
CARGNELUTTI FILHO, A.; STORCK, L..
O objetivo deste trabalho foi verificar a interferência de métodos de correção da produtividade de grãos de milho nos parâmetros adaptabilidade e estabilidade de cultivares. A correção da produtividade de grãos foi avaliada em 31 ensaios de competição de cultivares de milho, por meio dos seguintes métodos: sem correção, regra de três, método de Zuber, covariância da população média, covariância da população ideal, método proposto por Cruz, método proposto por Vencovsky & Cruz e método de correção estratificada. As estatísticas, desvio quadrático médio para cada um dos parâmetros de adaptabilidade e estabilidade e índice de concordância, foram utilizadas para verificar a magnitude da influência das correções. Os métodos covariância para a população...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Zea mays; Covariância; Uniformidade; Análise estatística; Precisão experimental; Covariance; Uniformity; Statistics analysis; Experimental precision.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/112524
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Numero de repeticoes e tamanho da parcela para selecao de progenies de milho em solos sob cerrado e fertil. Repositório Alice
RESENDE, M.D.V. de; SOUZA JUNIOR, C.L. de.
O objetivo neste trabalho foi obter informacoes relativas a tamanho de parcela e numero de repeticoes para avaliacao de progenies de milho (Zea mays L.) em solo sob cerrado e em solo fertil. Utilizaram-se, como material experimental, 200 progenies de meios-irmaos da variedade BR 108. Aplicou-se um metodo que tem por base a diminuicao da variancia fenotipica entre medias de progenies e consequente aumento no ganho genetico. O aumento do numero de repeticoes mostrou-se mais eficiente que o aumento do tamanho da parcela para elevar o ganho. O aumento do numero de repeticoes conduziu a acrescimos similares no ganho genetico no cerrado e no solo fertil, e o aumento do numero de plantas por parcela conduziu a um maior acrescimo no ganho genetico no cerrado que...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Milho; Tecnica experimental; Precisao experimental; Progresso genetico; Solo acido; Maize; Zea mays; Experimental technique; Experimental precision; Genetic process; Acid soil.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/handle/doc/94329
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Optimal size of experimental plots of papaya trees using a modified maximum curvature method Ciência Rural
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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OPTIMUM PLOT SIZE AND NUMBER OF REPLICATIONS IN PAPAYA FIELD EXPERIMENT Rev. Bras. Frutic.
SCHMILDT,EDILSON ROMAIS; SCHMILDT,OMAR; CRUZ,COSME DAMIÃO; CATTANEO,LAERCIO FRANCISCO; FERREGUETTI,GERALDO ANTÔNIO.
ABSTRACT The aim of this study was to estimate the optimum plot size and number of replications in papaya field experiments. Eleven variables were evaluated in four cultivars of papaya with planting in different seasons between 2011 and 2013 in the north of the Espírito Santo state. Analysis were made from blank test applied to 240 selected for planting season and cultivate plants in commercial fields. The determination of optimum plot size was performed by applying the methodologies of modified maximum curvature and maximum curvature of coefficient of variation. The determination of the number of repetitions was taken from the least significant difference in average 20% and 30%. The optimum plot size proved the same by the two methods studied for most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carica papaya L.; Experimental precision; Experimental planning.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000200603
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Planning and implementing experiments and analyzing experimental data in vegetable crops: problems and solutions Horticultura Brasileira
Lúcio,Alessandro Dal’Col; Sari,Bruno Giacomini.
ABSTRACT The statistical interpretation of experimental results is inherent to the research process. Therefore, every researcher is expected to have basic understanding on the subject. In vegetable crops, the planning, implementing and data gathering is more complex due to specific aspects related to this group of plants, such as intensive management and high labor requirement to carry out the experiments, uneven fruit maturation and heterogeneity of the experimental area. Since all these factors are sources of variability within the experiment, circumventing them in the experiment planning and implementing phases is fundamental to reduce the experimental error. Furthermore, the knowledge of statistical tests and the assumptions for their use is equally...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural experimentation; Experimental precision; Experimental error; Experimental designs; Applied statistics; Analysis of variance; Horticulture..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000300316
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Plot size and experimental unit relationship in exploratory experiments Scientia Agricola
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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Plot size and number of repetitions in vetch Bragantia
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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Plot size for evaluation of Arabica coffee yield Agronomy
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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PLOT SIZE IN THE EVALUATION OF PAPAYA SEEDLINGS 'BAIXINHO DE SANTA AMÁLIA' IN TUBES Rev. Bras. Frutic.
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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Productive variability, border use and plot size in trials with cherry tomato Ciência Rural
Santos,Daniel; Lúcio,Alessandro Dal’Col; Lopes,Sidinei José; Cargnelutti Filho,Alberto; Olivoto,Tiago.
ABSTRACT: Knowing the productive variability within protected environments is crucial for choosing the experimental design to be used in that conditions. Thus, the aim of the present study was to assess the variability of fruit production in protected environment cultivated with cherry tomatoes and to verify the border effect and plot size in reducing this variability. To this, data from an uniformity test carried out in a greenhouse with cherry tomato cv. ‘Lili’ were used. Total fresh mass of fruits per plant was considered being these plants arranged in cropping rows parallel to the lateral openings of the greenhouse and also the same plants arranged in columns perpendicular to these openings. To generate the borders, different scenarios were designed by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lycopersicon esculentum var. cerasiforme; Experimental design; Experimental precision; Olericulture; Protected environment..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000200202
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Sample size for estimate the average of Passiflora caerulea fruits traits Ciência Rural
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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Sample size for estimating mean and coefficient of variation in species of crotalarias Anais da ABC (AABC)
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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