Estimated optimum seeding dates for winter wheat in Ontario
Winter wheat (Triticum aestivum L.) must be seeded during an optimum period in the fall to achieve maximum yields. Present recommendations for fall seeding based on corn heat unit zones for Ontario have not been satisfactory in all areas. Results from seeding-date trials at five locations across Ont...
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| Veröffentlicht in: | Canadian journal of plant science 1993-04, Vol.73 (2), p.389-396 |
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| container_title | Canadian journal of plant science |
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| creator | Bootsma, A Andrews, C.J Hoelstra, G.J Seaman, W.L Smid, A.E |
| description | Winter wheat (Triticum aestivum L.) must be seeded during an optimum period in the fall to achieve maximum yields. Present recommendations for fall seeding based on corn heat unit zones for Ontario have not been satisfactory in all areas. Results from seeding-date trials at five locations across Ontario confirmed the concept of a 2-wk optimum seeding period (OSP) for winter wheat. A highly significant non-linear regression relationship (R
2
= 0.997) was established between the average optimum seeding date (OSD) for six locations in Ontario (taken as the mid-point of the OSP) and the average daily mean air temperature for the period 1 Sept. – 31 Oct. This relationship estimated OSDs more accurately for Ontario than a previously developed relationship based on data from across Canada. Climatic normals (1951–1980) data for more than 350 locations were used to construct 13 OSD zones for Ontario. Estimated OSD ranged from as late as 15 Oct. for the Windsor area to before 21 Aug. in the north around Kapuskasing. Average losses in yield from seeding after the OSP ranged from 75 kg ha
−1
day
−1
in southwestern Ontario to 40–65 kg ha
−1
day
−1
in eastern Ontario. Key words: Triticum aestivum L., optimum seeding date zones, climatic normals |
| doi_str_mv | 10.4141/cjps93-058 |
| format | Article |
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2
= 0.997) was established between the average optimum seeding date (OSD) for six locations in Ontario (taken as the mid-point of the OSP) and the average daily mean air temperature for the period 1 Sept. – 31 Oct. This relationship estimated OSDs more accurately for Ontario than a previously developed relationship based on data from across Canada. Climatic normals (1951–1980) data for more than 350 locations were used to construct 13 OSD zones for Ontario. Estimated OSD ranged from as late as 15 Oct. for the Windsor area to before 21 Aug. in the north around Kapuskasing. Average losses in yield from seeding after the OSP ranged from 75 kg ha
−1
day
−1
in southwestern Ontario to 40–65 kg ha
−1
day
−1
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2
= 0.997) was established between the average optimum seeding date (OSD) for six locations in Ontario (taken as the mid-point of the OSP) and the average daily mean air temperature for the period 1 Sept. – 31 Oct. This relationship estimated OSDs more accurately for Ontario than a previously developed relationship based on data from across Canada. Climatic normals (1951–1980) data for more than 350 locations were used to construct 13 OSD zones for Ontario. Estimated OSD ranged from as late as 15 Oct. for the Windsor area to before 21 Aug. in the north around Kapuskasing. Average losses in yield from seeding after the OSP ranged from 75 kg ha
−1
day
−1
in southwestern Ontario to 40–65 kg ha
−1
day
−1
in eastern Ontario. Key words: Triticum aestivum L., optimum seeding date zones, climatic normals</description><subject>Agricultural and forest climatology and meteorology. Irrigation. Drainage</subject><subject>Agricultural and forest meteorology</subject><subject>Agronomy. Soil science and plant productions</subject><subject>air temperature</subject><subject>Biological and medical sciences</subject><subject>climatic zones</subject><subject>crop yield</subject><subject>estimation</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General agronomy. Plant production</subject><subject>Generalities, techniques</subject><subject>Generalities. Techniques. Climatology. Meteorology. Climatic models of plant production</subject><subject>optimum seeding date zones</subject><subject>optimum seeding period</subject><subject>regression analysis</subject><subject>sowing date</subject><subject>spring and winter habit</subject><subject>Triticum aestivum</subject><issn>0008-4220</issn><issn>1918-1833</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><recordid>eNo9j09LxDAQxYMouK5e_ALm4EmoziRpN8WTyPoHFvagey7TZrJ22W1LUhG_vZGKpzfz-M3wnhCXCLcGDd41uyGWOoPcHokZlmgztFofixkA2MwoBafiLMZdWhdoYSbul3FsDzSyk_2Qps-DjMyu7bbSJTdK3wf51XYjJ_lgGmXbyXU3Umj7c3HiaR_54k_nYvO0fH98yVbr59fHh1XWqBzGjJRJ6qBg0l4hpxScK2uYSo8OvUNCo4hV7XydLwowuilqqy37omayei5upr9N6GMM7KshpMzhu0KofmtXU-0q1U7w9QQPFBva-0Bd08b_iwJKLKFM2NWEeeor2oaEbN4UoAZVLCBXRv8ArAJhSQ</recordid><startdate>19930401</startdate><enddate>19930401</enddate><creator>Bootsma, A</creator><creator>Andrews, C.J</creator><creator>Hoelstra, G.J</creator><creator>Seaman, W.L</creator><creator>Smid, A.E</creator><general>Agricultural Institute of Canada</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19930401</creationdate><title>Estimated optimum seeding dates for winter wheat in Ontario</title><author>Bootsma, A ; Andrews, C.J ; Hoelstra, G.J ; Seaman, W.L ; Smid, A.E</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c250t-a24250d06ea3f21e422e5284ea9f1d1fd1a142ae2bdfb576043c6b838ef6bea83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><topic>Agricultural and forest climatology and meteorology. Irrigation. Drainage</topic><topic>Agricultural and forest meteorology</topic><topic>Agronomy. Soil science and plant productions</topic><topic>air temperature</topic><topic>Biological and medical sciences</topic><topic>climatic zones</topic><topic>crop yield</topic><topic>estimation</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General agronomy. Plant production</topic><topic>Generalities, techniques</topic><topic>Generalities. Techniques. Climatology. Meteorology. Climatic models of plant production</topic><topic>optimum seeding date zones</topic><topic>optimum seeding period</topic><topic>regression analysis</topic><topic>sowing date</topic><topic>spring and winter habit</topic><topic>Triticum aestivum</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bootsma, A</creatorcontrib><creatorcontrib>Andrews, C.J</creatorcontrib><creatorcontrib>Hoelstra, G.J</creatorcontrib><creatorcontrib>Seaman, W.L</creatorcontrib><creatorcontrib>Smid, A.E</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Canadian journal of plant science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bootsma, A</au><au>Andrews, C.J</au><au>Hoelstra, G.J</au><au>Seaman, W.L</au><au>Smid, A.E</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Estimated optimum seeding dates for winter wheat in Ontario</atitle><jtitle>Canadian journal of plant science</jtitle><date>1993-04-01</date><risdate>1993</risdate><volume>73</volume><issue>2</issue><spage>389</spage><epage>396</epage><pages>389-396</pages><issn>0008-4220</issn><eissn>1918-1833</eissn><coden>CPLSAY</coden><abstract>Winter wheat (Triticum aestivum L.) must be seeded during an optimum period in the fall to achieve maximum yields. Present recommendations for fall seeding based on corn heat unit zones for Ontario have not been satisfactory in all areas. Results from seeding-date trials at five locations across Ontario confirmed the concept of a 2-wk optimum seeding period (OSP) for winter wheat. A highly significant non-linear regression relationship (R
2
= 0.997) was established between the average optimum seeding date (OSD) for six locations in Ontario (taken as the mid-point of the OSP) and the average daily mean air temperature for the period 1 Sept. – 31 Oct. This relationship estimated OSDs more accurately for Ontario than a previously developed relationship based on data from across Canada. Climatic normals (1951–1980) data for more than 350 locations were used to construct 13 OSD zones for Ontario. Estimated OSD ranged from as late as 15 Oct. for the Windsor area to before 21 Aug. in the north around Kapuskasing. Average losses in yield from seeding after the OSP ranged from 75 kg ha
−1
day
−1
in southwestern Ontario to 40–65 kg ha
−1
day
−1
in eastern Ontario. Key words: Triticum aestivum L., optimum seeding date zones, climatic normals</abstract><cop>Ottawa, ON</cop><pub>Agricultural Institute of Canada</pub><doi>10.4141/cjps93-058</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 0008-4220 |
| ispartof | Canadian journal of plant science, 1993-04, Vol.73 (2), p.389-396 |
| issn | 0008-4220 1918-1833 |
| language | eng |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Agricultural and forest climatology and meteorology. Irrigation. Drainage Agricultural and forest meteorology Agronomy. Soil science and plant productions air temperature Biological and medical sciences climatic zones crop yield estimation Fundamental and applied biological sciences. Psychology General agronomy. Plant production Generalities, techniques Generalities. Techniques. Climatology. Meteorology. Climatic models of plant production optimum seeding date zones optimum seeding period regression analysis sowing date spring and winter habit Triticum aestivum |
| title | Estimated optimum seeding dates for winter wheat in Ontario |
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