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This article in AJ

  1. Vol. 57 No. 5, p. 421-425
    Received: Nov 17, 1964



Nitrogen, Phosphorus and Potassium Uptake by Lowland Rice and Its Relation to Yields on Some Nigerian Alluvial Soil1

  1. Th. J. Bredero2



The linear part of the yield/N uptake curves plotted for two different soils indicates that N is taken up by rice independently of the pattern and rate of N applications as long as sufficient N is available for uptake by the plant. N uptake determines P and K uptake as long as P and K are sufficiently available in the soil. Surplus applications of P build up considerable soil reserves of total and available P which, above a critical level, become detrimental for yields.

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