| Abstract: | Abstract The proportionate distribution of fertilizer P amongst all organs of the potato plant was measured by frequent sampling of a field grown crop which had received labelled P fertilizer. The observed values of the proportions of P derived from the fertilizer in each organ were compared to the values predicted by three models. The results of the comparison indicated that differences in the proportionate distribution of fertilizer P amongst organs are to be expected whenever the proportion of fertilizer derived P in P entering the plant exceeds the proportion of fertilizer derived P in the P already present in the plant. |
