HD 2967 showed an 18% yield reduction with very late sowing.

sowing time · yield · Triticum aestivum (wheat)Positive and negative results

196 papers in the same direction as this claim · 265 in the opposite direction

1. positive
   Adapting planting dates and cultivar choices increases yield in temperate regions and avoids 7–18% of global losses.

   Simulating the effects of climate and agricultural management practices on global crop yield · 2011

   Opposite direction

2. positive
   Normal sowing tended to yield more, significantly in one of three experiments.

   The effect of sowing date, stale seedbed, row width and mechanical weed control on weeds and yields of organic winter wheat · 2004

   Opposite direction

3. positive
   Winter sowing increased spikes per square metre and kernel weight relative to freezing and spring sowing.

   Growth and Yield Response of Facultative Wheat to Winter Sowing, Freezing Sowing and Spring Sowing at Different Seeding Rates · 2006 · compared with freezing‐ and spring‐sown wheat

   Opposite direction

4. positive
   Adaptation assessments suggest that changes in sowing date and winter wheat and soybean cultivar selection could significantly affect crop production in the 21st century.

   Potential impact of climate change on selected agricultural crops in north‐eastern Austria · 2002

   Opposite direction

5. positive
   Adaptation through change in sowing times and increased, efficient input use could offset yield reduction and improve yields until mid-century.

   Vulnerability of wheat production to climate change in India · 2014

   Opposite direction

6. positive
   Delaying planting from 10 to 30 September increased expected grain yield by 18%.

   Planting Date Influence on Dual‐Purpose Winter Wheat Forage Yield, Grain Yield, and Test Weight · 2003

   Opposite direction

7. positive
   Achievable wheat sowing-date adjustments were estimated to increase untapped wheat production potential by 69%.

   Time management governs climate resilience and productivity in the coupled rice–wheat cropping systems of eastern India · 2022

   Opposite direction

8. positive
   Sowing wheat on mid-November gave the highest number of tillers and spikes per square meter.

   Effect of Planting Date and Fertilizer Application on Yield of Wheat under No till System · 2009 · compared with Early or delayed planting

   Opposite direction

453 papers more in this group