Sample size for estimating average productive traits of pigeon pea

Facco, Giovani; Filho, Alberto Cargnelutti; Alves, Bruna Mendonça; Burin, Cláudia; Santos, Gustavo Oliveira dos; Kleinpaul, Jéssica Andiara; Neu, Ismael Mario Márcio

doi:10.1590/0103-8478cr20150852

Cited by 5 publications

(8 citation statements)

References 8 publications

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“…Meanwhile, the mean estimate (m) of traits related to the dry matter (DML, DMS, DMR, DMAP, and TDM) would present an estimation error of 9.08 and 11.58% respectively for the first and second sowing dates ( Table 2). The estimation errors obtained in this study were slightly greater than those obtained by Facco et al (2016), although these authors calculated based on 360 pigeon pea plants. Table 2.…”

Section: Resultscontrasting

confidence: 78%

“…Likewise, sample size variability was verified in morphological and productive traits of forage turnip ; white lupine ; black oat and pigeon pea (Facco et al, , 2016. In addition, distinct sample sizes were found among evaluation times in black oat , millet (Kleinpaul et al, 2017), and pigeon pea and among agricultural years in pigeon pea (Facco et al, , 2016.…”

Section: Resultsmentioning

confidence: 85%

“…Research has been carried out to determine the sample size in morphological and productive traits of agricultural crops, including cover crops, such as: Canavalia ensiformis and Dolichos lablab (Teodoro et al, 2014); forage turnip ; white lupine (Burin, Cargnelutti Filho, Toebe, Alves, & Fick, 2014); black oat ; pigeon pea (Facco et al, , 2016; and millet (Kleinpaul et al, 2017). Regarding sunn hemp, sample sizes have been studied for productive traits of Crotalaria juncea (Teodoro et al, 2015), morphological and productive traits of Crotalaria spectabilis (Toebe et al, 2017) and for morphological traits of Crotalaria juncea (Schabarum et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Sample Sufficiency for Mean Estimation of Productive Traits of Sunn Hemp

Schabarum¹,

Filho²,

de³

et al. 2018

JAS

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Sunn hemp (Crotalaria juncea L.) is an annual cycle legume with high potential for biological nitrogen fixation, being widely used in crop rotation for biomass formation and control of nematodes. The objectives of this study were to determine the sample size for the mean estimation of productive traits of sunn hemp and verify the sample size variability between traits and sowing dates. Two uniformity trials were performed in the agricultural year 2014/2015, with sowing in October (trial 1) and December (trial 2). At the crop flowering stage, 300 plants of each trial were harvested and fresh and dry matter of leaves, stem, root, aerial part, and total weight were evaluated. The normality and randomness tests were performed for each trait and the sample size was calculated for the semi-amplitudes of the confidence interval (estimation errors) of 2, 4, 6, 8, 10, 12, 14, 16, 18 and 20% of the mean estimate. There is sample size variability between productive traits and between sowing dates. The assessment of at least 101 plants is required for mean estimation of productive traits with maximum estimation error of 20% of the mean and 95% confidence level.

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Section: Resultscontrasting

confidence: 78%

Section: Resultsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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Sample Sufficiency for Mean Estimation of Productive Traits of Sunn Hemp

Schabarum¹,

Filho²,

de³

et al. 2018

JAS

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“…Also, the needed sample size varied with the productive trait and harvest for this same crop (FACCO et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…Data that cover the range of variation in traits of interest better represent the crop, and these data help generate the capacity to estimate needed sample sizes that can be used as a reference for planning of future experiments. The need for variability in sample sizes to estimate means and associated errors for plant traits, cultivars, sowing dates, and evaluation times have been reported for crops such as maize (STORCK et al, 2007), castor bean (CARGNELUTTI FILHO et al, 2010), black oat , pigeon pea (FACCO et al, 2015(FACCO et al, , 2016, Crotalaria juncea, and Crotalaria spectabilis Roth (TEODORO et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Sample size to estimate the mean of morphological traits of rye cultivars in sowing dates and evaluation times

Bandeira¹,

Filho²,

Follmann³

et al. 2018

SCA

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The objectives of this study were to determine the sample size (number of plants) required to estimate the mean of morphological traits of rye (Secale cereale L.) and verify the sample size variability between the traits, cultivars, sowing dates, and evaluation times for distincts mean estimation errors. Ten uniformity trials were performed with two rye cultivars (BRS Progresso and Temprano) in five sowing dates (05/03/2016, 05/25/2016, 06/07/2016, 06/22/2016 and 07/04/2016). Evaluations of traits plant height, number of leaves, and number of stems were performed during the development of the crop. In order to verify the difference of the traits between cultivars and between sowing dates and evaluation times, the F-test was applied to test the hypothesis of homogeneity of variances and the Student's t-test was used to test the hypothesis of equality of means. The sample size of each trait was calculated for distincts mean estimation errors. There is sample size variability between the traits, cultivars, sowing dates, and evaluation times. In order to estimate the mean of plant height with the same precision, smaller sample sizes are required at the intermediate and final evaluation times compared to initial evaluation times. For the traits number of leaves and stems, smaller sample sizes are required in the initial evaluation times than in the final evaluation times. For mean estimation of traits with maximum estimation error of 15% between sowing dates and evaluation times, 83 and 103 plants are required respectively for cultivars BRS Progresso and Temprano. Key words: Sampling planning. Sampling precision. Secale cereale L. ResumoOs objetivos deste trabalho foram determinar o tamanho de amostra (número de plantas) para a estimação da média de caracteres morfológicos de centeio (Secale cereale L.) e verificar a variabilidade do tamanho de amostra entre caracteres, entre cultivares, entre épocas de semeadura e de avaliação, para distintos erros de estimação da média. Foram conduzidos dez ensaios de uniformidade, com duas cultivares de centeio (BRS Progresso e Temprano) em cinco épocas de semeadura (03/

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Sampling sufficiency, correlation and path analysis in forage pea

et al. 2024

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It is important to determine the number of plants to be evaluated to allow accurate inferences about the traits under evaluation. Investigating the linear relations among traits is important for identifying traits for indirect selection. So, the objectives of this study were to determine the sample size (number of plants) necessary to estimate the means of forage pea traits and to investigate the relations among the traits. Experiments were carried out in 2021 with three sowing dates (May 3, May 26 and July 13). Five hundred plants were randomly sampled, 100 plants in each of the five evaluation dates (June 25, August 30, July 24, September 17, September 16). In these 500 plants, the traits plant height, number of branches, number of nodes, number of leaves, number of pods, fresh matter of leaves, fresh matter of stems, fresh matter of pods, fresh matter of shoots, dry matter of leaves, dry matter of stems, dry matter of pods, and dry matter of shoots, were evaluated. The sample size was calculated to estimate the means of these traits, based on Student’s t-distribution, and the relations among traits were investigated through correlation and path analysis. In an experiment, to estimate the means of these 13 traits of forage pea, with an estimation error of approximately 10% of the mean, 99 plants per treatment should be sampled. The numbers of pods and leaves have a positive linear relations with fresh and dry matter of shoots.

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Sample size for estimating average productive traits of pigeon pea

Abstract: ABSTRACT

Cited by 5 publications

References 8 publications

Sample Sufficiency for Mean Estimation of Productive Traits of Sunn Hemp

Sample Sufficiency for Mean Estimation of Productive Traits of Sunn Hemp

Sample size to estimate the mean of morphological traits of rye cultivars in sowing dates and evaluation times

Sampling sufficiency, correlation and path analysis in forage pea

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