Irish Independent - Farming

The pros and cons of late-sowing winter cereal

- Richard Hackett is an agronomist based in North Co Dublin and is a member of the ACA and ITCA

can often be stressful.

There is also a theoretica­l risk that winter cereals sown in spring don’t get enough vernalisat­ion, which is a fancy way of saying that a crop that does not flower or set a head and spends its entire life just producing leaves.

It is a very rare occurrence but it does happen. Vernalisat­ion is a variety-specific trait and all varieties have a ‘latest sowing date’ establishe­d that should overcome this risk.

That risk addressed, the main activity we can do to protect late-sown crop is to consign the roller to the nettles in the yard. Once a crop is up and tillering it can be rolled, but rolling post-sowing can be a great help or turn into a disaster, depending on future weather. You can’t ‘unroll’ a field, so best leave it out for the time being.

Spring-sown winter varieties will not yield the same as autumn-sown crops, but can yield the same or more than spring-sown varieties. Production costs will have to reflect potential yield, so fertiliser applied, fungicide used, even herbicide costs will have to be rigorously scrutinise­d.

Indeed if the weather was to turn really cold and ground dried out quickly, there is a huge opportunit­y to delay cultivatio­n until the various closed slurry period have passed and utilise the bulging slurry stores that are around the county.

A good coating of slurry at this time of year could meet all the P and K requiremen­ts and the initial N requiremen­t of a crop that could otherwise struggle to wash its face, as well as providing a helping hand to highly stocked dairy farms. It is worth considerin­g.

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