Abstract:Nitrogenous fertilisers – especially urea – are key inputs into many farming systems. With increasing restrictions on nitrogen fertiliser application, there is an urgent need to ensure that nitrogen is used effectively. One technology that has been developed to contribute to this challenge is variable-rate application (VRA) of fertiliser. The theory is that fertiliser is applied at higher rates where there is sufficient grass cover to utilise the fertiliser, and at lower rates where grass cover is reduced (or … Show more
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