HIGHEST YIELDING VARIETY ON THE 2026 DAFM REC. LIST
Agronomic Characteristics
Extremely vigorous Autumn growth so especially suited if drilling is delayed into September
Remarkable stem stiffness and harvest security
Excellent scores for LLS resistance (8) giving added assurance in a wet Spring
Super pod shatter resistance
Turnip Yellow Virus resistance (TuYV)
“You need a good reliable break crop to set up your farm to drill winter cereals at the best time and get the most from your investment ”
Getting the most from LG Aviron
• Can be drilled up to mid-September as very vigourous Autumn growth
• 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 2026
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 2026.
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
