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Optimum plot size and number of replications for experiments with the chickpea
ABSTRACT In agricultural experimentation, use of the optimum plot size is an important way of increasing experimental precision; however, studies of this type are scarce for the chickpea, a legume that has been conquering both the market and consumers throughout the world. The aim of this study, the...
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Published in: | Ciência agronômica 2023, Vol.54 |
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creator | Magalhães, Jailson Ramos Azevedo, Alcinei Mistico Valadares, Nermy Ribeiro Fernandes, Ana Clara Gonçalves Alves, Rayane Aguiar Freitas, Igor Costa de Gomes, Luan Souza de Paula Costa, Cândido Alves da |
description | ABSTRACT In agricultural experimentation, use of the optimum plot size is an important way of increasing experimental precision; however, studies of this type are scarce for the chickpea, a legume that has been conquering both the market and consumers throughout the world. The aim of this study, therefore, was to determine the optimum plot size for evaluating experiments with the chickpea, in scenarios comprising combinations of the number of treatments, number of replications and levels of precision. Two blank experiments were carried out, comprising eight crop rows, 7 m in length, at a spacing of 50 cm between rows and 10 cm between plants; the six central rows were evaluated, giving a total of 60 plants per row. The index of soil heterogeneity was determined, and the optimum plot size was estimated using the Hatheway method in scenarios formed by a combination of i treatments (i = 4, 8, 12 and 16), r replications (r = 3, 4, 5, 6, 7 and 8) and levels of precision (LSD = 25%, 30% and 40%). The index of soil heterogeneity was greater than 0.7 for each of the variables under evaluation. The Hatheway method makes it possible to estimate different plot sizes based on the conditions and limitations of the experimental area. In experiments with the chickpea including 4 to 16 treatments, 25% LSD and six replications, plots of 25 basic units are sufficient to identify significant differences between the mean values of the treatments with a probability of 5%. |
doi_str_mv | 10.5935/1806-6690.20230032 |
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Ciênc. Agron</addtitle><description>ABSTRACT In agricultural experimentation, use of the optimum plot size is an important way of increasing experimental precision; however, studies of this type are scarce for the chickpea, a legume that has been conquering both the market and consumers throughout the world. The aim of this study, therefore, was to determine the optimum plot size for evaluating experiments with the chickpea, in scenarios comprising combinations of the number of treatments, number of replications and levels of precision. Two blank experiments were carried out, comprising eight crop rows, 7 m in length, at a spacing of 50 cm between rows and 10 cm between plants; the six central rows were evaluated, giving a total of 60 plants per row. The index of soil heterogeneity was determined, and the optimum plot size was estimated using the Hatheway method in scenarios formed by a combination of i treatments (i = 4, 8, 12 and 16), r replications (r = 3, 4, 5, 6, 7 and 8) and levels of precision (LSD = 25%, 30% and 40%). The index of soil heterogeneity was greater than 0.7 for each of the variables under evaluation. The Hatheway method makes it possible to estimate different plot sizes based on the conditions and limitations of the experimental area. In experiments with the chickpea including 4 to 16 treatments, 25% LSD and six replications, plots of 25 basic units are sufficient to identify significant differences between the mean values of the treatments with a probability of 5%.</description><subject>AGRONOMY</subject><issn>1806-6690</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNo9kMtqwzAQRbVooSHND3SlH7A7kizFXpbQF4Rm0XYtZGVMlNqWkRT6-PrauM1sBgbOHc4l5IZBLishb1kJKlOqgpwDFwCCX5DF-XhFVjEeYRxRKVB8QV52Q3LdqaND6xON7gep6fe0P3U1BuobGnBonTXJ-T7SxgeKXwMG12GfIv106UDTAak9OPsxoLkml41pI67-9pK8P9y_bZ6y7e7xeXO3zawQkDKJqjLcAGAJZm1loYzkpSwaWYt1yZTBEuW6rpQArLGRikHNoKiNZLjnexRLks-50TpsvT76U-jHh_p1ctWT6-wPDKAQfAT4DNjgYwzY6GGUMOFbM9BTc_oM6v_mxC8DXGCW</recordid><startdate>2023</startdate><enddate>2023</enddate><creator>Magalhães, Jailson Ramos</creator><creator>Azevedo, Alcinei Mistico</creator><creator>Valadares, Nermy Ribeiro</creator><creator>Fernandes, Ana Clara Gonçalves</creator><creator>Alves, Rayane Aguiar</creator><creator>Freitas, Igor Costa de</creator><creator>Gomes, Luan Souza de Paula</creator><creator>Costa, Cândido Alves da</creator><general>Universidade Federal do Ceará</general><scope>AAYXX</scope><scope>CITATION</scope><scope>GPN</scope></search><sort><creationdate>2023</creationdate><title>Optimum plot size and number of replications for experiments with the chickpea</title><author>Magalhães, Jailson Ramos ; Azevedo, Alcinei Mistico ; Valadares, Nermy Ribeiro ; Fernandes, Ana Clara Gonçalves ; Alves, Rayane Aguiar ; Freitas, Igor Costa de ; Gomes, Luan Souza de Paula ; Costa, Cândido Alves da</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c330t-5e69a2a00e80a7c546a52854f5b37816ae8e57b9630ebef5610b104ba51ed2de3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>AGRONOMY</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Magalhães, Jailson Ramos</creatorcontrib><creatorcontrib>Azevedo, Alcinei Mistico</creatorcontrib><creatorcontrib>Valadares, Nermy Ribeiro</creatorcontrib><creatorcontrib>Fernandes, Ana Clara Gonçalves</creatorcontrib><creatorcontrib>Alves, Rayane Aguiar</creatorcontrib><creatorcontrib>Freitas, Igor Costa de</creatorcontrib><creatorcontrib>Gomes, Luan Souza de Paula</creatorcontrib><creatorcontrib>Costa, Cândido Alves da</creatorcontrib><collection>CrossRef</collection><collection>SciELO</collection><jtitle>Ciência agronômica</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Magalhães, Jailson Ramos</au><au>Azevedo, Alcinei Mistico</au><au>Valadares, Nermy Ribeiro</au><au>Fernandes, Ana Clara Gonçalves</au><au>Alves, Rayane Aguiar</au><au>Freitas, Igor Costa de</au><au>Gomes, Luan Souza de Paula</au><au>Costa, Cândido Alves da</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Optimum plot size and number of replications for experiments with the chickpea</atitle><jtitle>Ciência agronômica</jtitle><addtitle>Rev. Ciênc. Agron</addtitle><date>2023</date><risdate>2023</risdate><volume>54</volume><issn>1806-6690</issn><abstract>ABSTRACT In agricultural experimentation, use of the optimum plot size is an important way of increasing experimental precision; however, studies of this type are scarce for the chickpea, a legume that has been conquering both the market and consumers throughout the world. The aim of this study, therefore, was to determine the optimum plot size for evaluating experiments with the chickpea, in scenarios comprising combinations of the number of treatments, number of replications and levels of precision. Two blank experiments were carried out, comprising eight crop rows, 7 m in length, at a spacing of 50 cm between rows and 10 cm between plants; the six central rows were evaluated, giving a total of 60 plants per row. The index of soil heterogeneity was determined, and the optimum plot size was estimated using the Hatheway method in scenarios formed by a combination of i treatments (i = 4, 8, 12 and 16), r replications (r = 3, 4, 5, 6, 7 and 8) and levels of precision (LSD = 25%, 30% and 40%). The index of soil heterogeneity was greater than 0.7 for each of the variables under evaluation. The Hatheway method makes it possible to estimate different plot sizes based on the conditions and limitations of the experimental area. In experiments with the chickpea including 4 to 16 treatments, 25% LSD and six replications, plots of 25 basic units are sufficient to identify significant differences between the mean values of the treatments with a probability of 5%.</abstract><pub>Universidade Federal do Ceará</pub><doi>10.5935/1806-6690.20230032</doi><oa>free_for_read</oa></addata></record> |
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title | Optimum plot size and number of replications for experiments with the chickpea |
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