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Nitrogen, Phosphorus and Potassium Uptake by Lowland Rice and Its Relation to Yields on Some Nigerian Alluvial Soil 1
Author(s) -
Bredero Th. J.
Publication year - 1965
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1965.00021962005700050003x
Subject(s) - nitrogen , phosphorus , potassium , agronomy , alluvium , yield (engineering) , soil water , environmental science , alluvial soils , chemistry , soil science , biology , paleontology , materials science , organic chemistry , metallurgy
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.