Management factors affecting establishment of birdsfoot trefoil (Lotus corniculatus L.) Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/ww72bg212

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  • A field experiment under irrigation was conducted at the Hyslop Agronomy Farm, near Corvallis, Oregon, during the 1967 growing season to evaluate the effect of barley row spacing, nitrogen rate and placement, and weed competition in the year of seeding upon birdsfoot trefoil (Lotus corniculatus L.) seedling establishment. The effect of birdsfoot trefoil on barley grain production was also evaluated. Three herbicides were used to measure the effects of weed competition upon birdsfoot trefoil establishment and barley grain production. These are: Avadex BW 1.25 lb. ai. per acre, 2, 4-DB amine 1.50 Ib. ai. per acre and DNBP amine 1.50 lb. ai. per acre. The effects of nitrogen in birdsfoot trefoil establishment and on barley grain production were studied using two systems of placement: 80 lb. N per acre broadcast and 20 lb. N per acre applied in rows spaced at 7 inches plus 60 lb. N per acre broadcast. The effects of row spacing on birdsfoot trefoil establishment and barley grain production were determined using five systems of seeding: (1) barley seeded alone in rows spaced at 7 inches, (2) barley seeded alone in rows spaced at 14 inches, (3) barley seeded in rows spaced at 7 inches plus birdsfoot trefoil seeded at the same time in the same row, (4) barley seeded in rows spaced at 14 inches plus birdsfoot trefoil seeded at the same time in the same row and in row between barley, and (5) birdsfoot trefoil seeded in rows spaced at 7 inches. It was concluded that the use of a barley companion crop to establish birdsfoot trefoil decreases the vigor of the trefoil; however, the number of plants per foot of row was similar to the other treatments. At constant seed rate of barley, an increase in row spacing above 7 inches gave a decrease of grain yield and an increase of dry matter yield of birdsfoot trefoil. Birdsfoot trefoil seeded alone gave the highest dry matter yield in the year of establishment. The trefoil did not affect the yield of barley. Application of nitrogen as urea reduced the number of plants of birdsfoot trefoil, when this species was seeded alone or together with barley, but the yield of the forage species was not reduced. Nitrogen application of 80 pounds per acre increased barley grain yield when it was applied broadcast, but not when it was split into 20 pounds nitrogen per acre in rows at seven inches and 60 pounds nitrogen per acre broadcast. An interaction between 2, 4-DB application and nitrogen placement was found in barley grain production, but not in birdsfoot trefoil establishment. Also, an interaction between 2,4-DB application and system of seeding was found to affect yield of dry matter of birdsfoot trefoil. 2, 4-DB increased birdsfoot trefoil yield and effectively controlled red root pigweed (Amaranthus retroflexus L.), common lambsquarter (Chenopodium album L.), common groundsel (Senecio vulgaris L.), and shepherdspurse (Capsella bursa-pastoris (L.) Medic.), but it did not influence barley grain yield and the number of plants of birdsfoot trefoil per foot of row. DNBP had a detrimental effect on barley yield and was similar to no herbicide on birdsfoot trefoil dry matter yield. It provided good control of common groundsel and shepherdspurse, and gave a poor control of red root pigweed and common lambsquarter. Avadex BW was applied to control wild oat; however, this weed was not present.
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  • File scanned at 300 ppi using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
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  • description.provenance : Rejected by Patricia Black(patricia.black@oregonstate.edu), reason: Replace on 2014-04-08T19:07:40Z (GMT)
  • description.provenance : Made available in DSpace on 2014-04-09T22:27:16Z (GMT). No. of bitstreams: 1 AsocarC.Patricio1968_Redacted.pdf: 1396236 bytes, checksum: 37c299b46e143100e1570e75cdd4cad2 (MD5) Previous issue date: 1968-05-10
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  • description.provenance : Approved for entry into archive by Katy Davis(kdscannerosu@gmail.com) on 2014-04-09T22:27:16Z (GMT) No. of bitstreams: 1 AsocarC.Patricio1968_Redacted.pdf: 1396236 bytes, checksum: 37c299b46e143100e1570e75cdd4cad2 (MD5)
  • description.provenance : Submitted by Alex McFerrin (amscannerosu@gmail.com) on 2014-04-04T01:01:53Z No. of bitstreams: 1 CPatricioA1968_Redacted.pdf: 1396236 bytes, checksum: 37c299b46e143100e1570e75cdd4cad2 (MD5)

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