dc.contributor.advisor | Verhalen, Laval M. | |
dc.contributor.author | Ranjbar, Gholam Abbas | |
dc.date.accessioned | 2015-11-09T22:51:12Z | |
dc.date.available | 2015-11-09T22:51:12Z | |
dc.date.issued | 1980-12 | |
dc.identifier.uri | https://hdl.handle.net/11244/21666 | |
dc.description.abstract | The purpose of this research was to investigate the effects of delayed harvest, cultivar, and boll type on field deterioration of (i.e., weathering damage to) yield-related traits and fiber quality in upland cotton (Gossypium hirsutum L.). Four stormproof, four storm resistant, and four open-boll cultivars were utilized in this study over 3 years at a single location. Each year when plant growth had totally ceased, random samples of 15 mature bolls were taken from each plot at approximately 2-week intervals. Seven traits associated with yield and six fiber quality characteristics were studied using analyses of variance and regression techniques. | |
dc.description.abstract | In most cases, cultivars having the same boll type displayed similar trends for weathering effects on traits associated with yield and fiber quality. Interactions of boll type with duration of pre-harvest weathering were significant in approximately half the possible instances, indicating that trends were frequently different among the boll types studied. | |
dc.description.abstract | All yield-related traits were reduced by delayed harvests in at least 2 of the 3 years. Adverse effects of weathering on most traits were more serious in open-boll cultivars than in the other two boll types, especially when compared to the stormproof cultivars. Storm resistant cultivars generally displayed intermediate responses between the open-boll and stormproof types, but did not differ significantly from the stormproof types for any yield-related trait in any year. Significant differences between storm resistant and open-boll types were occasionally detected. The three boll types did not differ in the rates at which their lint and seed indexes were reduced by weathering. | |
dc.description.abstract | All fiber quality traits were reduced by delayed harvests in at least 2 of the 3 years. Differences in weathering trends among boll types were not as consistent for fiber quality as they were for the yield-related traits. Significant differences among boll types for such trends were not detected for 2.5% span length, micronaire, or T1 fiber strength. In one year, storm resistant and open-boll types lost uniformity index more rapidly than did stormproof cultivars. In another year, open-boll cultivars suffered 50% span length reductions more rapidly than the other two; and open-boll cultivars lost T0 fiber strength more quickly than did the storm resistant types. | |
dc.description.abstract | The amounts of loss in each character that can be expected for each 2-week delay in harvest are provided for each boll type in this paper. | |
dc.format | application/pdf | |
dc.language | en_US | |
dc.rights | Copyright is held by the author who has granted the Oklahoma State University Library the non-exclusive right to share this material in its institutional repository. Contact Digital Library Services at lib-dls@okstate.edu or 405-744-9161 for the permission policy on the use, reproduction or distribution of this material. | |
dc.title | Effects of delayed harvest, cultivar, and boll type on weathering damage to yield-related traits and fiber quality in upland cotton | |
dc.contributor.committeeMember | McNew, Ronald W. | |
dc.contributor.committeeMember | Frahm, Richard R. | |
dc.contributor.committeeMember | Kirby, James S. | |
dc.contributor.committeeMember | Reed, Robert M. | |
osu.filename | Thesis-1980D-R197e.pdf | |
osu.accesstype | Open Access | |
dc.type.genre | Dissertation | |
dc.type.material | Text | |
dc.subject.keywords | gossypium hirsutum l. | |
dc.subject.keywords | boll size | |
dc.subject.keywords | pulled lint percent | |
dc.subject.keywords | picked lint percent | |
dc.subject.keywords | lint index | |
dc.subject.keywords | seed index | |
dc.subject.keywords | lint weight/boll | |
dc.subject.keywords | number of seed/boll | |
dc.subject.keywords | 2.5% span length | |
dc.subject.keywords | 50% span length | |
dc.subject.keywords | uniformity index | |
dc.subject.keywords | micronaire | |
dc.subject.keywords | t0 fiber strength | |
dc.subject.keywords | t1 fiber strength | |
thesis.degree.discipline | Crop Science | |
thesis.degree.grantor | Oklahoma State University | |