A real example, a trial conducted at Condobolin in 2005 comparing DAP and Product A in canola... Figure 1: Canola & alternative phosphorus source "Product A" The chart above shows there was no further significant yield response to phosphorus above 4 kg/ha... 65 kg/ha "Product A" or at an equivalent rate of 65 kg/ha: DAP provides 13 kg P/ha "Product A" provides 4 kg P/ha..
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