High yielding variety in DAFM 2021 - 2023
Agronomic Characteristics
Liam Wilkinson of Limagrain talks through selecting Winter Oilseed Rape (WOSR) Hybrid varieties with excellent disease resistance and pod shatter traits.
Newly recommended hybrid winter oilseed rape
Excellent Light Leaf Spot resistance( 8 on DAFM 2024 Recommended list)
Excellent stem stiffness and harvest security (due to low LLS infection on stems )
Has Turnip Yellow Virus (TuYV) resistance so ease of mind if drilling early
Getting the most from Dart WOSR
Can be drilled early as as excellent Light Leaf Spot resistance
Drill 50 seeds/m2 (70 seeds/m2 in September) but soil condition most important
Assess August drilled crops in mid October and spring for PGR requirements
Winter Oilseed Rape can capture and use N to reduce Fertilizer N in spring 2024
WOSR is the only autumn-sown crop that can use the effects of radiation by taking up nitrogen over the autumn and winter, adding it to sunshine and storing that (as green leaf and stem) to be used in the springtime to reduce Fertilizer N in Spring 2024.
Understanding N requirements using Canopy Management and GAI score
The system of canopy assessment works on the principle that a dense crop of rape contains more nitrogen (taken up over winter) than a thin crop.
The measurement is called the Green Area Index (GAI), and each score of GAI score = 50 kg N/ha (40 units per ac) is unbelievably valuable at current fertiliser prices.
The crop can be assessed (by eye, smartphone app or by weighing it) in springtime, and based on the GAI score, it is possible to save €100 per acre on the average crop of WOSR in spring.
Most WOSR crops are 2 Green Area Index (GAI) which can save 100 kg N/ha) using the Teagasc canopy management research.
WOSR Fertiliser requirements using GAI canopy management research.
Canopy Management Research conducted by Teagasc Oakpark, on how Winter Oilseed Rape can capture and use N.
WOSR crop and the effect of radiation on N requirements
Winter oil seed rape is the only Autumn sown crop that has the ability to harness sunshine and use /store in August, September, October and reduce Fertiliser N in Spring and is better than a cover crop.
WOSR can capture and use Canopy N (GAI) remains in the in the crop
Reduce your fertiliser consumption in spring with GAI calculations
Each unit of GAI contains 50kg of N
Crop requires 3.5 GAI at flowering
Applied fertiliser efficiency of 60%
Each 1t yield >3.5t/ha needs 60Kg /ha
UK developed system validated in by Teagasc Research in Ireland Canopy Management Research by john Spink
The Teagasc OSR N calculator can be found here on the Teagasc website
For more information, see WOSR Fertiliser requirments using GAI canopy management research by Teagasc with Seedtech
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