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heavier shallow soil zone

Catalogue: GRDC Final Reports
Three zones of contrasting soil types were identified for paddock 146A using EM38, grain yield and elevation data... Nitrogen was applied post emergence in large blocks (approx 40m x 100m) at three rates (20, 50 and 100kg/ha) with two replicates of each rate in each zone to wheat in 2004 and barley in 2005 and 2006... Grain yield (t/ha) P rate (kg/ha) Flat (heavy soil) Hill (light soil) 0 1.23 1.33 3 1.28 1.40 11 1.07 1.49 fertiliser rates in two zones, Yield increase (t/ha) needed the cost of the extra fertiliser 0.04 0.16..
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