A study in Ethiopia looked at how different amounts of phosphorus fertilizer affect wheat yield. They tested six levels of phosphorus on plant height, tillers, kernels per spike, spike length, grain yield, and biological yield. The highest yield (94.47 Q ha-1) was achieved with 115 kg ha-1 of phosphorus. Harvesting index was not affected by phosphorus levels. The study shows that using 115 kg ha-1 of phosphorus can help maximize wheat yield in the area.