Large initial applications of P to high P‐fixing soils had a marked residual effect on the yield of corn (Zea mays L.) 7 to 9 years after application. On a Georgeville soil very low in available phosphorus, an initial application of 612 pounds of P per acre 9 years earlier was still supplying sufficient P for high corn yields. Response of corn to 22 pounds of P per acre applied in a band was significantly affected by the P applied 8 and 9 years earlier. Similar results were found with the P uptake by corn grain. Above 8 ppm of available soil P (0.05N HCl + 0.025N H2SO4, extractant), there was no further increase in corn yields. For high corn yields on high P fixing soils, the entire root zone rather than isolated bands should have a high level of P.