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¹ Süleyman Demirel Üniversitesi Ziraat Fakültesi Tarla Bitkileri Bölümü, Isparta DOI : 10.16882/derim.2016.267917 Viewed : 1620 - Downloaded : 858 The research was carried out with aim to investigate to effect different phosphorus doses (0, 2, 4, 6 and 8 kg P₂O₅ da^-1) on yield and phosphorus used of buckwheat in Isparta in 2014 year. The experiment was set up according to a randomized complete block design with three replicates using the Aktaş buckwheat cultivar. In the research, grain yield, agronomic efficient, physiological efficient, agrophysiological efficient, recycling efficient and utilizing efficient with Mineral nutrient content of buckwheat were investigated in different phosphorus practices. The highest grain yield (132.3 kg da^-1) was obtained from 8 kg da^-1 phosphorus dose, however, among the 4, 6 and 8 kg da^-1 phosphorus doses weren`t statistically significant. The highest agronomic efficient (7.17%), physiological efficient (0.51%), agro-physiological efficient (0.24%) and utilizing efficient (21.48%) were obtained from 4 kg da<sup>-1</sup> phosphorus dose and the highest recycling efficient (48.3%) from 6 kg da<sup>-1</sup> phosphorus doses. Mineral nutrient content of buckwheat was increased depending on increasing phosphorus doses, and among the 4, 6 and 8 kg da<sup>-1</sup> phosphorus doses weren`t statistically significant expect for phosphorus and manganese element of buckwheat. The lowest values of mineral content in buckwheat were determined in non-fertilizer treatments. Keywords : Buckwheat, Phosphorus, Yield, Quality, Nutrient content