African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Sample size for evaluation of eggplant and gilo seedlings

Leonardo Raasch Hell
  • Leonardo Raasch Hell
  • Department of Agrarian and Biological Sciences, Federal University of Espírito Santo, São Mateus, ES, Brazil.
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Adriel Lima Nascimento
  • Adriel Lima Nascimento
  • Federal University of Espírito Santo, Brazil.
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Omar Schmildt
  • Omar Schmildt
  • Department of Agrarian and Biological Sciences, Federal University of Espírito Santo, São Mateus, ES, Brazil.
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Renan Garcia Malikouski
  • Renan Garcia Malikouski
  • Department of Agrarian and Biological Sciences, Federal University of Espírito Santo, São Mateus, ES, Brazil.
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Adriano Alves Fernandes
  • Adriano Alves Fernandes
  • Department of Agrarian and Biological Sciences, Federal University of Espírito Santo, São Mateus, ES, Brazil.
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Sávio da Silva Berilli
  • Sávio da Silva Berilli
  • Federal Institute of Education, Science and Technology of Espírito Santo / Campus Itapina, Rodovia BR 259, km 70, Rural Area, CEP: 29700-970, Colatina, ES, Brazil.
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Nilson Nunes Morais Junior
  • Nilson Nunes Morais Junior
  • Federal Institute of Education, Science and Technology of Espírito Santo / Campus Itapina, Rodovia BR 259, km 70, Rural Area, CEP: 29700-970, Colatina, ES, Brazil.
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Waylson Zancanella Quartezani
  • Waylson Zancanella Quartezani
  • Federal Institute of Education, Science and Technology of Espírito Santo / Mountain Campus, Highway ES 130, km 01, Palhinha Neighborhood, CEP: 29890-000, Mountain, ES, Brazil.
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José Augusto Teixeira do Amaral
  • José Augusto Teixeira do Amaral
  • Federal University of Espírito Santo, Brazil.
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Edilson Romais Schmildt
  • Edilson Romais Schmildt
  • Department of Agrarian and Biological Sciences, Federal University of Espírito Santo, São Mateus, ES, Brazil.
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  •  Received: 21 June 2017
  •  Accepted: 10 August 2017
  •  Published: 24 August 2017

Abstract

In horticultural nurseries, it is important to determine the number of plants to be evaluated to obtain reliable inferences about seedling growth. The objective of this study was to determine the sample size required to estimate the mean of quality traits of eggplant and gilo seedlings. The seedlings of both vegetables were produced in expanded polystyrene trays using (8×16) 128 cells each and 40 cm3 high. At 45 days after sowing, the following traits were evaluated in each seedling of the two crops: leaf number; total leaf area; fresh matter mass of shoot, roots and the total of fresh matter mass of shoot and roots, and Dickson quality index. Measures of central tendency and variability were calculated; the normality of the sample data was tested, and the sample size was calculated. The sample size required is different among the different traits of eggplant and gilo seedlings, and the same trait is different between the two crops. The sample size to evaluate seedlings for an estimation error of 10% of the estimated mean and at a confidence level of 95% is 32 and 26 for eggplant and gilo, respectively.

Key words: Solanum melongena, Solanum gilo, sampling, experimental precision.