K. A. Ayotade

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During the growing seasons (May to October) of 1987 and 1988 respectively five and four different rates of N were tested on maize (Zea mays L.) at 12 different field sites across the Southern Guinea Savanna of Nigeria. Nitrogen was applied through granular urea (size +14 mesh), ordinary prilled urea (−35 mesh) and calcium ammonium nitrate. Marked(More)
The sulphide-ion electrode was used to study the kinetics and reactions of free hydrogen sulphide in solution of flooded rice soils. The observed sulphide potential obeyed the Nernst equation over a range of sulphide-ion concentration from 10-1 to 10-19 M. Peak H2S concentrations were lowest in neutral soils high in iron and manganese; moderately high in(More)
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