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- Title
Experimental dimensions and precision in trials with millet and showy rattlebox.
- Authors
Cargnelutti Filho, Alberto; Maronez de Souza, Jéssica; Lixinski Silveira, Daniela; Luiza da Costa, Samanta; Fillipin Osmari, Bruno; Fillipin Osmari, Lucas
- Abstract
The objective of this study was to determine the optimal plot size to evaluate the mass of fresh matter in millet (Pennisetum glaucum L.) and showy rattlebox (Crotalaria spectabilis Roth.), in scenarios formed by combinations of treatment numbers, repetitions numbers, and levels of experimental precision. Fifteen uniformity trials with millet and showy rattlebox, in single or intercropping, were carried out. The mass of fresh matter was evaluated in 540 basic experimental units (BEU) of 1 × 1 m (15 trials × 36 BEU per trial). The heterogeneity index of Smith (1938) was estimated. The plot size was determined by the method of Hatheway (1961) in scenarios formed by combinations of i treatments (i = 5, 10, 15, 20, and 25), r repetitions (r = 3, 4, 5, 6, 7, 8, 9, and 10), and d precision levels (d = 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20%). To evaluate the mass of fresh matter of millet and showy rattlebox, in single or intercropping, with 5 to 25 treatments and with five repetitions, plots of 10 m² of useful area are sufficient for differences between treatments of 9% of the overall average of the experiment to be considered significant at 0.05 probability.
- Subjects
MILLETS; PEARL millet; INTERCROPPING; CATCH crops
- Publication
Brazilian Journal of Agricultural Sciences / Revista Brasileira de Ciências Agrárias, 2021, Vol 16, Issue 3, p1
- ISSN
1981-1160
- Publication type
Article
- DOI
10.5039/agraria.v16i3a8686