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Abstract:
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Compared with adequate water (W1), water stress (W2) consistently reduced yields of dried tops and the maximum yield plateau for the relationship between yield and the level of P applied, by up to 25 to 60 per cent in both cases. Compared with W1, the effectiveness of superphosphate for producing dried tops decreased for W2 by 11 to 45 per cent, for both freshly-applied and incubated superphosphate. Consequently, in the field, water supply may effect plant yield responses to freshly-and previously-appli
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