A field study was conducted for two years to assess the spatial and temporal effect of Phosphorus fertilizer on the yield, yield components and yield stability of five soybean genotypes in Umudike and Amakama in eastern Nigeria. The study was laid out as a split-plot in a randomized complete block with three replications. P rates of 0, 10, 20, 30 and 40 kg P/ha as triple superphosphate (TSP, 20% P) was randomly allocated to sub-plots and five soybean varieties (TGX 1440-1E, TGX 1448-2E, TGX 1485-1D, TGX 1835-10E and TGX 1910-14F) to main
Key words: Soybean (Glycine max L.) genotypes, yield stability, grain yield, genotype x environment interaction (GEI)
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