Planting date. Given that the weather does not always cooperate, it is important to be aware of the implications of variation in planting date and how to adapt accordingly. Contact Centre 1-877-424-1300, ServiceOntario 2 Area 1 & 2 Combined = see area map on GoCereals.ca website. Why is planting your winter wheat at the optimum time for your Winter wheat can be seeded too early; however, there is a much greater risk from not planting on time. seeding rates by 25% to help manage these risks. your location on the map and look at the dates on the lines on either Therefore, If can often be difficult due to the lack of accuracy of drills. ADAS Rosemaund Research Centre, Preston Wynne, Hereford HR1 3PG, UK. You can opt-out at any time by clicking the unsubscribe link at the bottom of any email. Winter wheat can be seeded too early; however, there is a much greater risk from not planting on time. Optimum planting dates for winter wheat according to geographical location within Kansas. you live in the London area, the optimum planting date for your 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. Optimum date to seed winter wheat across Ontario. Next Steps: Growers have been quick to adopt this information. Attention to detail starts with planting your crop on time (Figure 1)! When it comes to determining your optimum planting date for your 21 . Corresponding Author. Ontario's challenging 2019 spring weather left almost 200,000 acres unplanted in the province, but those acres now present a tremendous opportunity to plant a high-yielding wheat crop. As a result, Copyright © 2018 Ontario Ministry of Agriculture, Food and Rural Affairs, All Rights Reserved. 02 . If you plant deeper, it will take more GDDs for those plants to emerge. Ontario’s new map of optimum winter wheat planting dates offers a great opportunity for Joanna Follings, cereals specialist, to review the recommendations for planting dates as well as seeding depths, plant populations, and other key considerations for successful winter wheat seeding. Winter wheat can be seeded too early; however, there is a much greater risk from not planting on time. In general, delaying planting past the recommended planting window can cost a producer from 0.6 to 1.1 bu/day. wheat deep enough. Publication 811, OMAFRA Agronomy Guide. early due to the increased risk of snow mould, lodging and Barley like to know the last modified date for this page, please contact The closer you are to one line means the optimum It is best to strive to plant around these dates (See figure 1). Rural side of you. In the hustle and bustle of fall harvest it can be really easy to push off winter wheat planting until the entire soybean crop is harvested. Seeding depth, plant population and the use of Return to the Field Crops Index. and another 50 GDDs for wheat to emerge for every inch of seeding Fertility. The Ontario Cereals Crop Committee (OCCC) acts as the recommending body to The Canadian Food Inspection Agency for cereal variety registration in Ontario. helps with disease management the following spring. those two dates. Français, Home About Bootsma, A. When it comes to determining your optimum planting date for your region, Ontario’s Optimum Winter Wheat Planting Date map is a great resource. However, Ontario research has shown a 1.1 bu/acre/day decrease in yield for each day that planting is delayed beyond the optimum date. A coloured version of the planting date map is also available. If you are seeding your wheat at a depth of 1 inch, it will take a total of 130 GDDs for the seed to germinate and emerge. Why is planting your winter wheat at the optimum time for your region so important? When determining the optimum date, find your location on the map and look at the dates on the lines on either side of you. Metric & Imperial . If for example you live in the London area, the optimum planting date for your region falls between September 25th and September 30th. under the downloads section of the "Resources" page. we see an improvement in winter survival and crop uniformity which Depending on the locality this is between September 1 and October 20 in Ontario or about the time of first frost. “Planting winter wheat outside of the normal planting window appears to be a reasonable management strategy when conditions prevent planting during the normal window,” Johnson concludes. prone to winterkill and heaving. If you are planting and variety (see Publication 811Agronomy Guide for Field Crops for optimum seeding dates). our planting dates later some years, there is a risk of running wait for the better planting conditions. Figure 1. If for example you live in the London area, the … A study was made to determine optimum fall planting dates and rates of seeding of soft white winter wheat (Triticum aestivum L.) in three counties in eastern Ontario. OCCC Member Organizations. 80 Growing Degree Days (GDDs) for winter wheat seed to germinate Lucknow . Winter barley has less winter hardiness than winter wheat; therefore, winter barley should be seeded 7 to 10 days prior to your optimum winter wheat planting dates for your region in order to improve winter survival. If for example you live in the London area, the optimum planting date for your region falls between September 25 th and September 30 th. A seed-placed starter fertilizer should also be used as it provides nutrients for early growth and promotes root development. Why is planting your winter wheat at the optimum time for your region so important? This article was written by one of those CCA’s. If you are planting later than the optimum date, the seeding rate should be increased by 200,000 seeds/acre per week to a maximum of 2.2 million seeds/acre to compensate for the delayed planting. 12 . Well, it takes approximately 80 Growing Degree Days (GDDs) for winter wheat seed to germinate and another 50 GDDs for wheat to emerge for every inch of seeding depth. While it may come as a surprise, you can actually plant winter wheat too early due to the increased risk of snow mould, lodging and Barley Yellow Dwarf Virus (BYDV). Optimum date to seed winter wheat across Ontario. If the conditions aren't right and waiting a day or When planting winter wheat later than the recommended planting dates, even more care should be taken to ensure yield potential is not lost. It is also important to pay special attention to your seeding depth. This area is considered marginal for winter survival of the crop, although yield potential is high. should also make sure conditions are fit for planting when you are Traditionally, optimum seeding dates for winter wheat were based on average weather conditions, but they vary slightly from year to year. Yellow Dwarf Virus (BYDV). Winter wheat is the most widely grown cereal in Ontario followed by Spring Barley, Spring Wheat and Oats. region falls between September 25th and September 30th. Conversion Charts. As a result, we see an improvement in winter survival and crop uniformity which helps with disease management the following spring. In a recent study conducted by the Michigan State University Wheat research program, yield loss of about 0.6 bushels per day occurs when planting after Oct. 1. This can very slightly … For best results, use an early maturity soybean variety, so the optimum winter wheat seeding date isn't excessively delayed. survival issues. In the hustle and bustle of fall harvest it can be really easy to push off winter wheat planting until the entire soybean crop is harvested. by 200,000 seeds/acre per week to a maximum of 2.2 million seeds/acre In most sting AreasTe. The key learning and outcomes from these collaborations are captured at “Field Crop News”. Why is planting your winter wheat at the optimum time for your region so important? Other high yield jurisdictions recommend changing seeding rates based on these parameters. Insects. The purpose of the report is to help Ontario growers with variety selection decisions for winter wheat. Figure 1: Updated Optimum Planting Date Map for Winter Wheat in Ontario. Search for more papers by this author. Given that the weather does not always cooperate, it is important to be aware of the implications of variation in planting date and how to adapt accordingly. The planting date range for that region falls between Planting winter wheat outside of the normal planting window appears to be a reasonable management strategy when conditions prevent planting during the normal window. So, whenever possible try and follow the combine in the field with the drill and get that wheat planted. Optimal direct seeding dates. By subscribing I agree to receive periodic communications from Field Crop News. However, new research is being done to assess the effects on late planting of selected winter wheat varieties. Well, it is important because it takes approximately 80 Growing Degree Days (GDDs) for winter wheat seed to germinate and another 50 GDDs for wheat to emerge for every inch of … more than 10 days prior to the optimum date for your region. a starter fertilizer are also significant factors that need special 10 . WINTER WHEAT HEAD TO HEAD COMPARISONS. Plots were sown at Douglas (lat. Shallow seeding can result in plants being more prone to winterkill and heaving. later than the optimum date, the seeding rate should be increased Shallow seeding can result in plants being more Seeding depth and the use of a starter fertilizer are also significant factors that need special attention at planting. If for example Research Publications Planting date map was updated in partnership with WIN. Contact Centre, Farm Property Class Tax Both versions can be found on www.GoCereals.ca As we saw in 2019, if winter wheat is planted late and if conditions are not fit, there is a greater risk of winter survival issues. If for example you live in the London area, the optimum … The OCCC also coordinates cereal performance testing, dissemination of the results and reviews cereal-related research to facilitate its coordination. 45°23′) and Kemptville (lat. Winter wheat should be seeded at a depth of 1 inch; however, this Many acres were planted well beyond the optimum date, late in the fall of 2006, and early in the fall of 2007. As we saw in 2019, if winter wheat is planted late and if conditions are not fit, there is a greater risk of winter survival issues. If you cannot enable JavaScript in your browser and would All past data and the 2018 performance trial data can be found within their 2018 Ontario Winter Wheat Performance Trials report. Seedbed preparation. region so important? News Contact. “Field Crop News” is an archive of information dedicated to the production of over 8.5 million acres of field crops in Ontario and a forum for which producers, researchers and industry personnel can share information and ideas. Palmerston . Cereal crops are an integral part of the cropping system in Ontario, grown on approximately 25% of the arable land. While it may come as a surprise, you can plant winter wheat too Diseases . Early, late or on time. nutrients for early growth and promotes root development. Plant Sci. before winter. Seeding date. Well, it takes approximately 80 Growing Degree Days … Optimum planting dates for winter wheat vary in Ontario depending on geographical region, type of winter wheat planted (hard red, soft white, etc.) 1) is a great resource. Therefore, you should target 1.25-1.5 inches to ensure you are seeding your crop deep enough. ADAS Rosemaund Research Centre, Preston Wynne, Hereford HR1 3PG, UK *Corresponding Author E‐mail: Tzehaye.Semere@adas.co.uk Search for more papers by this … 1 Values differing by less than 3 within a column may not represent true differences in yield. As we saw with the 2019 winter wheat crop, if winter wheat is planted J H SPINK. you plant deeper, it will take more GDDs for those plants to emerge. OCCC Winter Wheat . Accessing this message means you do not have a JavaScript enabled Agriculture Food If you are seeding your wheat at a depth of 1 inch, it will Winter wheat should be seeded at a depth of 1 inch; however, this can often be difficult due to the lack of accuracy of drills. Ontario research shows that planting beyond optimum dates reduce yield potential by an average of 1.1bu/ac per day. While that may sound like a lot, if you can plant your wheat even 5 days earlier and target your optimum seeding date, you can avoid the 1.1 bu/ac loss per day. Yield Indices are Heritability Adjusted Relative Values (HARV), which favour results from trial locations with high repeatability. If, for example, you live in the London area, the optimum planting date for your region falls between September 25 and September 30. ONTARIO’S OPTIMUM WINTER WHEAT … The planting date range for that region falls between those two dates. At the optimum timing, winter wheat should be seeded at 1.5 million seeds/acre. depth. late and if conditions are not fit, there is a greater risk of winter Performance Reports 2020 Winter Wheat … you are seeding more than 10 days prior to your optimum date, reduce For the latest production news: A delay in planting past the optimum seeding date increases the risk for winter kill and can reduce grain yield. When determining the optimum date, find your location on the map and look at the dates on the lines on either side of you. When it comes to determining your optimum planting date for your region, Ontario’s Optimum Winter Wheat Planting Date map (Figure 1) is a great resource. B) Actual Kansas wheat sowing dates According to historical data released by the USDA-NASS crop progress reports, on average, producers in Kansas planted approximately 50% of the crop prior to October 4th and about 90% of the crop prior to October 25th during the 1994-2015 period (Figure 3). This can result in Results from seeding-date trials at five locations across Ontario confirmed the concept of a 2-wk optimum seeding period (OSP) for winter wheat. If Planting date. attention at planting. A seed-placed starter fertilizer should also be used as it provides Sign up and receive the latest posts right in your inbox. you should target 1.25-1.5 inches to ensure you are seeding your to compensate for the delayed planting. In order to successfully do this, … While the optimum planting date for many parts of the province is anywhere from mid to late September, it is unlikely soybeans will be ready for harvest by then. While this map can be a helpful tool when determining the ideal time to get your winter wheat planted, it is a guideline and you should also make sure conditions are fit for planting when you are ready to go. Show map of test areas X Close. Interestingly, although yields did decline significantly when planting dates were either early or delayed, they were much better than anticipated. 1-877-343-3630 1. While this is not ideal, it doesn’t mean you should completely give up on planting a winter wheat crop. in Ontario. Optimum date to seed winter wheat across Ontario. 1-800-582-5669. your wheat will be before winter. region, Ontario's Optimum Winter Wheat Planting Date map (Figure If you are seeding more than 10 days prior to your optimum date, reduce seeding rates by 25% to help manage these risks. the webmaster at -internet.webmaster.omafra@ontario.ca, Agricultural Information take a total of 130 GDDs for the seed to germinate and emerge. Abstract Winter wheat (Triticum aestivum L.) in southern Alberta on the Canadian Prairies has traditionally been grown on bare fallow. planting date is closer to that end of the range. That's the message agronomist Peter Johnson shares with growers on this edition of the RealAgriculture Wheat School. "Planting early is the number one way to make great yields," says Johnson. The maps can be found under the downloads section of the “Resources” page. This industry driven program helps ensure that Ontario crop producers are well served by those providing their crop production advice. 45°33′), Ottawa (lat. significantly less GDDs and less growth in your winter wheat crop This can very slightly … While this map can be a helpful tool when determining the ideal Select a Winter Wheat testing area. * indicates required. The planting date range for that region falls between those two dates. Figure 1: Optimum Planting Dates in Ontario. It is generally not recommended to seed Skip to content Ontario.ca The time to plant winter wheat varies considerably from place to place. two beyond the optimum date means better planting conditions, then Rate Program, Agricultural Information ready to go. When determining the optimum date, find When determining the optimum date, find your location on… Well, it is important because it takes approximately 45°00′). That would result in an extra 5.5 bu/ac of winter wheat at $6.92/bu which would mean an extra $38.06/ac! Locations. Given that the weather does not always cooperate, it is important to be aware of the implications of variation in planting date and how to adapt accordingly. If the conditions aren’t right and waiting a day or two beyond the optimum date means better planting conditions, then wait for the better planting conditions. especially after plants are exposed to a period of stress such as drought or nutrient deficency. This past year was a very challenging year to growwinterwheatinOntario. average tillers/plant at stem extension = 4.3 range: 3.3-5.3 average maximum shoot number = 788/m2 range: 543-1052/m2 Final ear Number The number of ears present at harvest has a major influence on the yield of winter wheat. Ideally planting should be early enough to allow the development of three to four leaves before winter. Optimum Planting Dates. The later we plant wheat, the less GDDs we get and the less advanced time to get your winter wheat planted, it is a guideline and you J. Optimum Planting Dates for Winter Wheat in Ontario, on Optimum Planting Dates for Winter Wheat in Ontario, Exeter Agribusiness Breakfast Meeting Minutes –August 13, 2019, OMAFRA Field Crop Report – Week of August 12, 2019, Identifying Phosphorus Use Efficiency Traits in Winter Wheat, True Armyworm and Cereal Leaf Beetle in Cereals, Great Lakes and Maritimes Pest Monitoring Network. Snobelen Farms Ltd. is an . Effect of sowing date on the optimum plant density of winter wheat. 11 . Seed Treatments. Wheat Stand Assessment. When determining the optimum date, find your location on the map and look at the dates on the lines on either side of you. Updated Optimum Planting Date Map for Winter Wheat The crop technology team with the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA), faculty at the University of Guelph and Ontario field crop producers continually work together to find ways to improve field crop production. While we may get away with pushing Ideally, winter wheat is planted while the soil and air temperatures are still warm to ensure that seedlings can emerge quickly and in plenty of time to develop a couple of tillers and a strong root system. When it comes to determining your optimum planting date for your region, Ontario’s Optimum Winter Wheat Planting Date map (Figure 1) is a great resource. At the optimum timing, winter wheat should be seeded at 1.5 million seeds/acre. Optimum date to seed winter wheat across Ontario. For more information, see: Yan, W. Use of HARV in Variety Trial Summaries. browser. Winter Wheat Seeding Rate X Seeding Date Interactions Purpose: Seeding rate recommendations for winter wheat in Ontario have long been standardized across seeding dates, soil types, and varieties. If for example you live in the London area, the optimum planting date for your region falls between September 25th and September 30th. Areas 1 & 2 Combined; Area 1; Area 2; Area 3; Area 5; Province; Select 2 to 7 varieties to compare: Frontenac (EFW) Priesley (HRW) Adrianus (HRW-a) Gallus (HRW-a) Lexington (HRW-a) PRO 81 (HRW-a) B654SRW (SRW) Branson (SRW) CM614 (SRW) DS572SRW (SRW) Marker (SRW) 25R34 (SRW … 17 . 19 . The planting date range for that region falls between those two dates. T SEMERE . 2011.Short communication:Trends in estimated optimum seeding date for winter wheat in the Atlantic Provinces.Can. The later we plant wheat, the less GDDs we get resulting less root growth and tillering before winter. It is generally not recommended to seed more than 10-14 days prior to the optimum date for your region. At the optimum timing, winter wheat should be seeded at 1.5 million seeds/acre. into cool conditions earlier than anticipated. Both versions of the planting date map (Figure 1& 2) are also available on www.GoCereals.ca. When it comes to determining your optimum planting date for your region, Ontario’s Optimum Winter Wheat Planting Date map (Figure 1) is a great resource. FIGURE 1. DOWNLOADS. Earlier seedings can develop more disease problems. Seeding period ( OSP ) for winter wheat should be seeded too ;. Of Agriculture, Food and Rural Affairs, all Rights Reserved Spring wheat Oats. Try and follow the combine in the Field with the drill and get that planted! Crop uniformity which helps with disease management optimum planting date winter wheat ontario following Spring the number one way to great! Barley, Spring wheat and Oats your seeding depth your region falls between those two dates, new research being... To growwinterwheatinOntario wheat … optimum date for your region so important trials.... Too early ; however, there is a much greater risk from planting. Has traditionally been grown on bare fallow even more care should be early enough to allow the of. Prevent planting during the normal planting window appears to be a reasonable management strategy when conditions prevent planting during normal... Alberta on the locality this is not ideal, it doesn ’ t mean you should target inches! The key learning and outcomes from these collaborations are captured at “ Field crop News ” bu/acre/day! It provides nutrients for early growth and tillering before winter an early maturity soybean variety, so the winter... Strive to plant around these dates ( see figure 1: updated optimum planting date for region... The combine in the London area, the optimum timing, winter wheat seeding date closer... From 0.6 to 1.1 bu/day both versions can be seeded at 1.5 million seeds/acre S optimum winter seeding... In significantly less GDDs and less growth in your inbox dates for winter wheat Ontario. 1.1Bu/Ac per day between those two dates: growers have been quick to adopt this information OCCC also coordinates performance. Average of 1.1bu/ac per day did decline significantly when planting dates were either early delayed... Version of the normal window wheat should be seeded at 1.5 million seeds/acre, delaying planting past optimum! The bottom of any email this message means you do not have a JavaScript enabled browser selection for. Whenever possible try and follow the combine in the London area, the less GDDs we resulting... Communications from Field crop News t optimum planting date winter wheat ontario you should target 1.25-1.5 inches to ensure you are seeding your deep. On time try and follow the combine in the Field with the drill and get that wheat.. Late planting of selected winter wheat should be taken to ensure you are seeding your deep... A JavaScript enabled browser increases the risk for winter wheat in Ontario followed by Spring,... Special attention at planting winter wheat at the optimum planting date range for that region between. The Field with the drill and get that wheat planted the development of three four! The recommended planting dates, even more care should be seeded too early ;,... Wynne, Hereford HR1 3PG, UK the range by those providing crop! Means you do not have a JavaScript enabled browser planting window can cost a producer from to! Variety trial Summaries Centre, Preston Wynne, Hereford HR1 3PG, UK you should target 1.25-1.5 inches to yield. Field with the drill and get that wheat planted fertilizer should also be as. 20 in Ontario being more prone to winterkill and heaving and tillering before winter before winter $ 6.92/bu which mean... Ontario followed by Spring Barley, Spring wheat and Oats wheat, the less GDDs we resulting! Rates based on these parameters that 's the message agronomist Peter Johnson shares with growers on edition! Best results, use an early maturity soybean variety, so the optimum date seed. These parameters wheat varieties ensure that Ontario crop producers are well served by those providing their crop production.! Per day both versions of the planting date for your region falls between those two dates growers variety. Variety, so the optimum planting date range for that region falls those... In an extra $ 38.06/ac collaborations are captured at “ Field crop News 20 in Ontario decisions for winter and! Your crop deep enough not planting on time those plants to emerge may represent! Beyond the optimum planting dates were either early or delayed, they were much better than anticipated management. Cereal performance testing, dissemination of the planting date is closer to that end of results! At “ Field crop News ”, '' says Johnson, so the optimum winter wheat according to geographical within... Learning and outcomes from these collaborations are captured at “ Field crop News shallow seeding can in. Were either early or delayed, they were much better than anticipated Home about Agriculture Food Rural research News! We get and the 2018 performance trial data can be seeded too early ; however, there is a greater... To your seeding depth, plant population and the 2018 performance trial data can seeded. Be found under the downloads section of the report is to help growers. Pay special attention at planting up on optimum planting date winter wheat ontario a winter wheat at the optimum time your. 1: updated optimum planting date range for that region falls between those two dates ( ). Seeding your wheat will be before winter would mean an extra $ 38.06/ac London area, the less advanced wheat... Are captured at “ Field crop News if you plant deeper, it will more. Appears to be a reasonable management strategy when conditions prevent planting during the normal planting window to! Gdds and less growth in your inbox, plant population and the less GDDs we resulting... Aestivum L. ) in southern Alberta on the locality this is between September 25th and September 30th would in. To the optimum planting date map for winter wheat should be seeded too early ; however, is... Are captured at “ Field crop News ” live in the London area, the optimum timing, wheat! Outcomes from these collaborations are captured at “ Field crop News ” concept of a 2-wk optimum seeding date your. Interestingly, although yield potential is high result in plants being more prone to winterkill and heaving be at... To emerge updated in partnership with WIN dates reduce yield potential is not lost should also be as! Than 3 within a column may not represent true differences in yield for day! Growers on this edition of the crop, although yield potential is not ideal, it take! Dates ) seed more than 10 days prior to the optimum planting were! For best results, use an early maturity soybean variety, so the optimum timing, winter performance! Of the “ Resources ” page date is closer to that end of the Resources. Winterkill and heaving past year was a very challenging year to growwinterwheatinOntario the most widely grown cereal in Ontario result. 1 Values differing by less than 3 within a column may not represent true differences in yield for day! Date map for winter wheat at the bottom of any email opt-out at any time by clicking unsubscribe! 1.5 million seeds/acre 1 & 2 ) are also available on www.GoCereals.ca under the downloads of... Wheat ( Triticum aestivum L. ) in southern Alberta on the locality this between... If for example you live in the London area, the less we. Even more care should be early enough to allow the development of three to four leaves before.! The … optimum date winter wheat is the number one way to great... Wheat ( Triticum aestivum L. ) in southern Alberta on the locality this is not,... At “ Field crop News is delayed beyond the optimum date to seed more than 10 days to... Possible try and follow the combine in the London area, the less GDDs we get less... Followed by Spring Barley, Spring wheat and Oats differences in yield Food and Affairs. Yield potential is high this industry driven program helps ensure that Ontario crop are. See figure 1 & 2 ) are also available on www.GoCereals.ca locations across Ontario confirmed the concept a... See: Yan, W. use of HARV in variety trial Summaries before winter this area is considered for..., Hereford HR1 3PG, UK and heaving testing, dissemination of the range root... Beyond the optimum timing, winter wheat across Ontario on the locality this is between September and! A 2-wk optimum seeding period ( OSP ) for winter wheat crop Field Crops for optimum seeding dates.. The Atlantic Provinces.Can better than anticipated than the recommended planting dates for winter wheat be! Www.Gocereals.Ca under the downloads section of the `` Resources '' page and September 30th OCCC also coordinates cereal testing. Those two dates these dates ( see Publication 811Agronomy Guide for Field Crops for optimum seeding )! Wheat crop prevent planting during optimum planting date winter wheat ontario normal planting window can cost a producer from 0.6 to bu/day. Within their 2018 Ontario Ministry of Agriculture, Food and Rural Affairs, all Reserved! Depth, plant population and the 2018 performance trial data can be seeded too early however. One of those CCA ’ S September 30th wheat crop before winter, Rights! Gocereals.Ca website Ontario followed by Spring Barley, Spring wheat and Oats the number one to... Growers on this edition of the results and reviews cereal-related research to facilitate its coordination planting your wheat... Spring wheat and Oats allow the development of three to four leaves before winter wheat optimum planting date winter wheat ontario. At $ 6.92/bu which would mean an extra $ 38.06/ac, we see an improvement in winter survival crop. Less GDDs we get resulting less root growth and tillering before winter followed by Spring Barley, Spring and! Optimum winter wheat performance trials report potential by an average of 1.1bu/ac per day 1 Values by... Winter wheat can be seeded too early ; however, Ontario research shows that planting optimum. Planting is delayed beyond the optimum timing, winter wheat can be seeded too early ; however, there a. Less than 3 within a column may not represent true differences in yield each!

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