Maize (Zea Mays L.) plant is one of the most produced cereals around the world. Phosphorus (P), which is one of the most used fertilizers in maize production. P is not a renewable resource and in next 50-100 years, it may be finish. Moreover, less P fertilization may limit crop yield and production capacity. The purpose of study is to investigate the effects of different P dosses on P uptake and its usage efficiency upon maize plant under long term P fertilizer filed experiment. Long-term field experiment was established in 1998, since then regularly each year control (without fertilization), 5, 10 and 20 kg P2O5 da-1 P (as triple superphosphate) doses are applied as a basic fertilizers. P2088 maize genotype was used as plant material. Maize seeds were sown in June 2017 and were harvested in October 2017. After harvest, yield, shoot and root dry weight were determined. P concentrations of each parts were determined by ICP-OES. Agronomic Efficiency (AE), Physiological Effciency (PE), Agrophysiological Effciency (APE), Apparent Recovery Effciency (ARE) and Utilization Effciency (EU) were calculated. According to the research findings; increasing doses of P applications increase different plant parts dry matter yield and P concentration. However, it is seen that P10 application is statistically the best application on AE, FE, GKE and KE calculations. It was determined that under field condition application of P10 kg da-1 P2O5 dose was the optimum dose for maize production.
