Optimal plot size for experimental trials with Opuntia cactus pear

Guimarães, Bruno Vinícius Castro; Donato, Sérgio Luíz Rodrigues; Aspiazú, Ignácio; Azevedo, Alcinei Místico; Carvalho, Abner José de

doi:10.4025/actascitechnol.v42i1.42579

Cited by 4 publications

(6 citation statements)

References 18 publications

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“…Applying the methodologies of Smith (1938) and Hatheway (1961) in a set of uniformity trials conducted in different sowing periods and with different cultivars makes it possible to generate useful information to be used as a reference in the planning of experiments with buckwheat crop, aiming at higher experimental precision. These methodologies have been used in beans (MAYOR -DURÁN; BLAIR; MUÑOZ, 2012), sunflower (SOUSA et al, 2015;SOUSA;SILVA;ASSIS, 2016), banana (DONATO et al, 2018, cactus pear (GUIMARÃES et al, 2019;GUIMARÃES et al, 2020) and in species with potential for soil cover, such as: velvet bean (CARGNELUTTI FILHO et al, 2014a); forage turnip (CARGNELUTTI FILHO et al, 2014b); and flax (CARGNELUTTI FILHO et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Plot Size, Number of Treatments and Replicates and Experimental Precision in Buckwheat

et al. 2020

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The objective of this work was to determine the optimal plot size to evaluate the fresh weight in buckwheat (Fagopyrum esculentum Moench) of the IPR91-Baili and IPR92-Altar cultivars, in scenarios formed by combinations of numbers of treatments, numbers of replicates, and levels of experimental precision. Sixteen uniformity trials (blank experiments) were carried out, eight with cultivar IPR91-Baili and eight with cultivar IPR92-Altar. The trials were performed in eight sowing dates. The fresh weight was evaluated in 576 basic experimental units (BEU) of 1 m x 1 m (36 BEU per trial). The soil 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, and 20), r replicates (r = 3, 4, 5, 6, 7, and 8), and d precision levels (d = 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, and 20%). To evaluate the fresh weight in buckwheat of the IPR91-Baili and IPR92-Altar cultivars, in experiments under completely randomized and randomized block designs, with 5 to 20 treatments and eight replicates, plots of 8 m3of useful area are sufficient to identify significant differences between treatments, at 5% probability level, of 15% of the overall mean of the experiment.

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Section: Introductionmentioning

confidence: 99%

Plot Size, Number of Treatments and Replicates and Experimental Precision in Buckwheat

et al. 2020

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“…Therefore, besides the indicated size of 15 m 2 , the researcher can investigate within his availability of experimental area, number of treatments to be evaluated and desired precision, which combination of plot size and number of repetitions is the most appropriate. In crops, such as: sunflower (Sousa et al, 2016); banana (Donato et al, 2018); forage palm (Guimarães et al, 2020); velvet bean (Cargnelutti Filho et al, 2014b); forage turnip (Cargnelutti Filho et al, 2014c); flax (Cargnelutti Filho et al, 2018); and black oat with common vetch (Cargnelutti Filho et al, 2020), the application of Smith (1938) and Hatheway (1961) methodologies has generated important subsidies for planning the experiments.…”

Section: Vu (X) (In Thousands)mentioning

confidence: 99%

“…The methodologies of Smith (1938) and Hatheway (1961) can be applied to uniformity trials data (trials without treatments) in order to calculate the optimal plot size according to the experimental design, treatment numbers, repetition numbers, and experimental precision levels. These methodologies have been used in sunflower (Sousa et al, 2016), in banana (Donato et al, 2018), in forage palm (Guimarães et al, 2020), and in species with potential for ground cover, such as: velvet bean (Cargnelutti Filho et al, 2014b); forage turnip (Cargnelutti Filho et al, 2014c); flax (Cargnelutti Filho et al, 2018); and black oat with common vetch (Cargnelutti Filho et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Experimental design and precision in trials with black oat, common vetch, and forage turnip intercropping

Filho

Silveira²,

Loregian³

et al. 2022

Agraria

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The objective of this study was to determine the optimal plot size for evaluating the fresh matter of black oat (Avena strigosa Schreb), common vetch (Vicia sativa L.), and forage turnip (Raphanus sativus L.), grown in intercrop, in scenarios formed by combinations of treatments numbers, repetitions numbers, and experimental precision levels. Six uniformity trials were conducted with the consortium of black oat, common vetch, and forage turnip, with three trials evaluated at 84 days after sowing (DAS) and the other three trials at 119 DAS. Fresh matter was assessed in 216 basic experimental units (BEU) of 1 × 1 m (6 trials × 36 BEU per trial). The heterogeneity index of Smith (1938) was estimated. Plot size was determined by the method Hatheway (1961) in scenarios formed by combinations of i treatments (

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“…Methodologies from Smith (1938) and Hatheway (1961) can be applied to calculate the optimal plot size according to the number of treatments, number of repetitions, and experimental precision. These methodologies have been used in grain sorghum (Lopes et al, 2005;Brum et al, 2008), sunflower (Sousa et al, 2016), banana (Donato et al, 2018), forage palm (Guimarães et al, 2020), buckwheat (Cargnelutti Filho et al, 2020a), and tomato (Oliveira et al, 2021). It has still been used, in single and intercropped cultivation of black oat + vetch (Cargnelutti Filho et al, 2020b), millet + slender leaf rattlebox (Cargnelutti Filho et al, 2021a), millet + showy rattlebox (Cargnelutti Filho et al, 2021b), and intercropping of black oat + common vetch + forage turnip (Cargnelutti Filho et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Optimal plot size in single or intercropping sorghum and showy rattlebox

Filho

Neu²,

Trivisiol³

et al. 2022

Agraria

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The objective of this study was to determine the optimal plot size to evaluate fresh matter productivity of sorghum (Sorghum bicolor (L.) Moench) and showy rattlebox (Crotalaria spectabilis Roth.). Fifteen uniformity trials (blank experiments) with sorghum and showy rattlebox, in single or intercropping, were carried out. The fresh matter productivity was evaluated in 540 basic experimental units (BEU) of 1 × 1 m (15 trials × 36 BEU per trial). The plot size was determined by the method of Hatheway (1961), in scenarios formed by combinations of treatment numbers, repetitions numbers, and levels of experimental precision. To evaluate the fresh matter productivity of sorghum and showy rattlebox, in single or intercropping, with 5 to 30 treatments and with five repetitions, plots of 10 m² of useful area are sufficient for differences between treatments of 24% of the overall average of the experiment to be considered significant at 0.05 probability.

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Optimal plot size for experimental trials with Opuntia cactus pear

Cited by 4 publications

References 18 publications

Plot Size, Number of Treatments and Replicates and Experimental Precision in Buckwheat

Plot Size, Number of Treatments and Replicates and Experimental Precision in Buckwheat

Experimental design and precision in trials with black oat, common vetch, and forage turnip intercropping

Optimal plot size in single or intercropping sorghum and showy rattlebox

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