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Growers in Western Australia who have been yield mapping since the mid 1990s have come to realise that grain yield varies across different zones of their paddocks in any given year, as well as between years depending on the seasonal conditions and crop type. This within paddock variation can be as much as tenfold. Higher yielding areas can be due to better growing conditions (which increases the demand for nutrients) and/or better nutrient supply (which reduces the need for some fertiliser inputs). Hence, it is essential to determine the cause of the variation before optimum fertilising strategies can be developed.
Number of Pages
Fertilizers, Precision farming, Field crops, Yield factors, Field experimentation, Western Australia
Agriculture | Agronomy and Crop Sciences
Patabendige, D, Wong, M, and Bowden, B. (2003), Zone management in precision agriculture by matching fertiliser input to crop demand. Department of Primary Industries and Regional Development, Western Australia, Perth. Bulletin 4584.