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Abstract

 

This article in AJ

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


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doi:10.2134/agronj1965.00021962005700050003x

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

  1. Th. J. Bredero2

Synopsis

Synopsis

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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