| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000420270 |
| ISSN: | 0001-3765 |
| Authors: | Toebe, Marcos1 Machado, Leticia N2 Tartaglia, Francieli L2 Carvalho, Juliana O. de3 Bandeira, Cirineu T4 Cargnelutti-Filho, Alberto4 |
| Institutions: | 1Universidade Federal de Santa Maria, Departamento de Ciencias Agronomicas e Ambientais, Frederico Westphalen, Rio Grande do Sul. Brasil 2Universidade Federal do Pampa, Campus Itaqui, Itaqui, Rio Grande do Sul. Brasil 3Universidade Federal de Pelotas, Programa de Pos-Graduacao em Fisiologia Vegetal, Capao do Leao, Rio Grande do Sul. Brasil 4Universidade Federal de Santa Maria, Departamento de Fitotecnia, Santa Maria, Rio Grande do Sul. Brasil |
| Year: | 2018 |
| Season: | Jun |
| Volumen: | 90 |
| Number: | 2 |
| Pages: | 1705-1715 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English 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% (ACI 95% ) of 2%, 4%, ..., 20% was determined by resampling with replacement. The sample size varies among species and characters, being necessary a larger sample size to estimate the mean in relation of the necessary for the coefficient of variation |
| Disciplines: | Agrociencias, Administración y contaduría, Demografía |
| Keyword: | Fitotecnia, Planeación, Características de la población, Crotalaria, Precisión experimental, Número de vainas, Muestreo |
| Keyword: | Crop husbandry, Planning, Demographics, Crotalaria, Experimental precision, Number of pods, Sampling |
| Full text: | Texto completo (Ver PDF) |
