Q Where is HEAR grown?
A HEAR crops are widely grown in France, Germany, UK, Canada and USA.
Crops of HEAR have been grown in the UK since 1986.
- The estimated size of the UK HEAR market is >25,000 hectares.
Q Will Growing '00' Rape mean I can’t grow HEAR?
A No - as long as there are two (or more) other crops between HEAR and '00' crops the level of cross contamination will not affect the
marketability of either type.
- Minimise volunteer plants in subsequent Rape crops by leaving any seed shed at harvest on the soil surface for as long as possible before doing any cultivation.
- A lot of studies show some seed surviving in the soil over several years, but the number of seeds surviving in the soil and the numbers that germinate are not the same. It is estimated that only 1 – 5% of the seeds in the soil seedbank germinate in subsequent years.
Q Will growing HEAR contaminate my land?
A No - to our knowledge this has never happened, with growers in the past regularly switching with no concerns.
- You'd need to have 30,000 volunteer HEAR plants in an average '00' crop to cause the erucic acid level to rise above the 2% target.
- Even in a 1 in 3 OSR rotation this level would be exceedingly rare if good agronomic practices are followed.
Notes on the likely contamination of a subsequent '00' crop following HEAR can be downloaded here.
Q Is here an isolation distance required?
A Yes - 2 metres or a physical break. Oilseed rape pollen does not travel in the wind, studies have shown that cross-pollination is as low as 1% at a distance of 1.5 metres and less that 0.1% at 10 metres.
Q How do I manage my crop of HEAR?
A HEAR crops are managed in a similar fashion to any other Rape crop being grown. Varietal information is supplied to our growers regarding standard agronomic factors such as crop height, disease susceptibility and maturity, etc.
Q Are HEAR varieties as high yielding as other Rape?
A Yes - new HEAR varieties give yields that are equivalent to '00' (see our Descriptive List for details); any minor differences in yield is frequently offset by the quality bonuses gained, for example, there is often a higher oil content from HEAR varieties over many '00' types.
Q What seed treatments will be applied to the planting seed?
A Our Winter HEAR planting seed will have the most modern products available applied to them, as per other commercial Rape seed. The seed treatment of choice at the moment is Hy-Pro Duet.
Q What is the grower’s position with crop failures, or loss of crop?
A Our contracts are for the 'produce of area' and are non-defaultable, so growers will never face charges if facing shortfalls in production.