Starter Fertiliser in OSR Increases Survival

Once we (hopefully!) get some rain and drilling can occur, think about seedbed nutrition. By using a well-placed NPKS, either in the seedbed or broadcast before emergence, you can help reduce the risk of failure. Independent trials have shown that placing fertiliser can increase yields by around 0.2t/ha; therefore, if you have the ability to do so it can be really beneficial. 

An ideal starter fertiliser is one that contains NPKS. We need the phosphate (P) for root and shoot development and potassium (K) also helps with root growth and water regulation; which could be very helpful if dry conditions are prevalent during establishment. By ensuring there is enough K for optimal stomatal opening and closing, the plant will be better placed to cope with drier conditions by being able to regulate transpiration rates efficiently.   

The rate of nitrogen depends on whether you plan on placing or broadcasting the fertiliser, but rates would be 20-30kgN/ha at this timing. Don’t forget NVZ rules, if you are in an NVZ 30kgN/ha is the maximum allowed (there is also an application cut-off date of the end of October). 

Trials work has also shown that using an NPKS in the autumn can help with overwinter survival rates, with 90-100% survival when compared to an NS grade at around 38% survival.  Trials have observed potassium acting as an “anti-freeze” in the winter by lowering the cell’s sap freezing point and preventing frost damage. 

When thinking of all those points a perfect grade is YaraMila Actyva S - 15.6-14.6-14.6 + 6.5% SO3 to give your oilseed crop the best chance this autumn, or if you are on a liquid system something like Yara Multi 18-27-0+B could be suitable if no K is required.