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    Farm Contractor & Large Scale Farmer
    Arable & Livestock

    Hutchinsons advises on mitigating high fertiliser prices

    Matthew TiltBy Matthew TiltOctober 7, 20215 Mins Read
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    Aerial,View,Of,Loading,Fertilizer,Into,Spreader,On,Tractor

    As the industry deals with unprecedented fertiliser price rises, fuelled by surging wholesale gas markets, has left many farmers questioning how to reduce the impact this will have on 2022 crop margins.

    The cost of ammonium nitrate and urea has more than doubled in the last 12 months, rising to £550 per tonne and £620 per tonne respectively by early October, leaving those unable to secure cheaper supplies earlier this year considering cutting rates next spring.

    Hutchinsons crop nutrition manager Tim Kerr explained that there has been a notable increase since the summer, with nitrogen prices rising from the equivalent of 80p per kilogram to nearer £1.60, adding around £160 per hectare to the growing cost of a typical wheat crop.

    While the desire to cut rates is understandable, Mr Kerr warned that doing so must not compromise yield potential, and added that there are several ways growers can mitigate the impact of reducing nitrogen inputs and maximise the return from every kilogram applied.

    “We’ve seen a polarisation of the market between farmers who were lucky enough to secure supplies at lower prices and will therefore manage crops as normal by pushing for yield and quality, versus those facing much higher prices who may only buy 60-70% of their normal requirement to save costs,” he said.

    “Those in the latter category will need to consider optimum N rates very carefully and talk to their agronomist before making any final decisions.”

    Four steps to get the most from nitrogen fertiliser

    Tim Kerr of Hutchinsons
    Tim Kerr of Hutchinsons

    Get roots working well

    If rates of applied fertiliser are to be cut, then ensuring crops can capture and utilise what is already in the soil will be fundamental to reducing any impact on yield, said Mr Kerr.

    This starts in the autumn establishment period by building strong root systems able to capture as much soil nitrogen as possible.

    “Ensure crops are sown into good conditions with nothing to restrict establishment going into winter. If you maul crops in late into poor seedbeds or those with underlying soil structure issues, then no amount of nutrition can rectify that.”

    Phosphate and potash are particularly important for building strong root systems, so soil testing for P, K and magnesium before drilling, with targeted seedbed fertiliser applied where necessary, can be worthwhile, he adds.

    Where it has not been possible to apply a seedbed starter fertiliser, Mr Kerr said phosphite biostimulants such as Phorce and Advance 66 can also help by stimulating early root development. These are normally applied as a split dose, with one in the autumn at growth stage 12 and a second in spring at GS 30.

    Consider alternative N sources

    Given that the nitrogen use efficiency (NUE) of granular fertilisers can be relatively low in dry springs, more farmers are turning to foliar nitrogen within their fertiliser strategies and Mr Kerr believes it is something worth considering next spring.

    Applying nutrients directly to leaves facilitates much more efficient plant uptake than is possible from surface-applied fertilisers taken in via roots, and crucially does not rely on soil conditions. Therefore, more of every kilo applied is utilised by plants, allowing total rates to be reduced compared with granular fertilisers, he said.

    “The NUE of some foliar N products is as close to 100% as you can get, so there’s a good chance that you could make up much or all of any reduction in applications of less efficient granular nitrogen fertiliser.”

    Measure soil nutrients

    Understanding how much nitrogen is in the soil is vital for maximising NUE, so growers should plan to carry out Soil Mineral Nitrogen (SMN) tests in the New Year so that nitrogen rates can be tailored accordingly, Mr Kerr explained.

    “The NUE of applied fertiliser relates to what a crop takes up. If you apply 200 kg N/ha but the crop takes up 100 kg from the soil and only uses 100 kg of what you applied, then the NUE of applied N is only 50%. Knowing what’s in the soil and available to plants is essential, especially if you’re looking to reduce rates next spring.”

    But Mr Kerr reminded growers that nitrogen must not be considered in isolation, as many other nutrients influence the ability of crops to efficiently utilise N, notably phosphate and sulphur.

    “If you’re going to apply less N, then it is vitally important you accurately test soils to ensure all other nutrients are optimal to maximise NUE.”

    Calibrate spreaders

    Accurate spreader calibration is important in any season, but it could take on added significance where growers buy in fertiliser products that are different to their usual supplies, noted Mr Kerr.

    The quality of some imported fertiliser products may not be of the same standard that farmers have become accustomed to, so it is vital to check spreader performance and accuracy, especially when applying over larger working widths, he said.

    Given little sign of fertiliser prices easing in the immediate future, Mr Kerr concludes by urging farmers to plan nutrition strategies carefully over the coming months to ensure crop yields are not unnecessarily affected by cutting rates to reduce costs. He also encourages any farmers still with fertiliser to buy to contact their usual supplier as soon as possible.

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    Matthew Tilt
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    Machinery editor for Farm Contractor & Large Scale Farmer. Matt has worked as an agricultural machinery journalist for five years, following time spent in his family’s Worcestershire contracting business. When he’s not driving or writing about the latest farm equipment, he can be found in his local cinema, or with his headphones in, reading a good book.

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