Balanced incomplete block and lattice square designs for testing yield differences among large numbers of soybean varieties

dc.contributor.author Weiss, Martin
dc.contributor.author Cox, Gertrude
dc.contributor.department Extension and Experiment Station Publications
dc.date 2018-02-18T13:06:32.000
dc.date.accessioned 2020-06-30T06:57:38Z
dc.date.available 2020-06-30T06:57:38Z
dc.date.embargo 2017-06-02
dc.date.issued 2017-06-02
dc.description.abstract <p>Two quasi-factorial arrangements which are especially well adapted to the testing of differences between large numbers of varieties are described and treated in detail as to their analysis and value.</p> <p>The arrangements described are balanced incomplete block and lattice square designs. Soybean variety trials are used to illustrate the analysis and the relative precision on soils of varying homogeneity.</p> <p>Although the efficiency factor of these designs, because of the confounding of variety differences with block effects, is lower than that of randomized complete block designs, yet on soil of normal variability the designs permit the elimination of sufficient variability due to soil differences to more than offset this loss. The merits of the lattice square arrangement are demonstrated on extremely heterogeneous soil where use of the design results in a gain in precision of 150 percent over that of randomized complete blocks. An illustration is also presented in which the design on very uniform soil results in a loss of precision of 31.5 percent.</p> <p>The use of these designs is recommended in variety trials involving large numbers of varieties when the trials are conducted on variable soil and when differences between the varieties are relatively small.</p>
dc.identifier archive/lib.dr.iastate.edu/researchbulletin/vol23/iss257/1/
dc.identifier.articleid 1271
dc.identifier.contextkey 10243928
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath researchbulletin/vol23/iss257/1
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/62577
dc.source.bitstream archive/lib.dr.iastate.edu/researchbulletin/vol23/iss257/1/AgriculturalResearchBulletin_v023_b257.pdf|||Fri Jan 14 17:40:48 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Other Statistics and Probability
dc.title Balanced incomplete block and lattice square designs for testing yield differences among large numbers of soybean varieties
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isJournalIssueOfPublication f83d2878-ff96-4b03-a85b-af2567ecb4e0
relation.isOrgUnitOfPublication 302bd0e8-f82f-406a-88b5-c8f956b5f77b
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