An evaluation of weed interference in rice grown on hydromorphic soils in West Africa Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/gq67jt449

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Field, screenhouse, and laboratory experiments were conducted to study weed interference in rice grown on hydromorphic soils at the International Institute of Tropical Agriculture (IITA) at Ibadan, Nigeria. Rice and weeds emerged at the same time, 1 week after planting. Weed dry weight was significantly reduced when the crop was kept weed-free for at least 4 weeks after emergence. Initial weeding for 2 weeks was not effective, because weeds reappeared and competed actively with rice plants. Season-long weed competition reduced rice grain yield by 73%. Weed competition reduced the number of tillers and panicles of rice. The detrimental effect of early weed interference was not offset by keeping the crop weed-free later in the growing season. At 6 weeks after emergence, most of the weed species had reached flowering stage when rice was still producing tillers. Handweeding at 2 and 6 weeks was effective enough to reduce weed pressure. Rice seems to be most sensitive to weed interference during this period from the second to the sixth week.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome, 24-bit Color) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Submitted by Kaylee Patterson (kdpscanner@gmail.com) on 2013-05-10T19:53:19Z No. of bitstreams: 1 DiopAmadouMakhtar1989.pdf: 1037089 bytes, checksum: d214cc1ecdca072948d1335aa055b2df (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-05-10T20:18:54Z (GMT) No. of bitstreams: 1 DiopAmadouMakhtar1989.pdf: 1037089 bytes, checksum: d214cc1ecdca072948d1335aa055b2df (MD5)
  • description.provenance : Made available in DSpace on 2013-06-04T16:38:42Z (GMT). No. of bitstreams: 1 DiopAmadouMakhtar1989.pdf: 1037089 bytes, checksum: d214cc1ecdca072948d1335aa055b2df (MD5) Previous issue date: 1988-09-20
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-06-04T16:38:42Z (GMT) No. of bitstreams: 1 DiopAmadouMakhtar1989.pdf: 1037089 bytes, checksum: d214cc1ecdca072948d1335aa055b2df (MD5)

Relationships

In Administrative Set:
Last modified: 08/04/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items