H MOLAHOSEINI - Scientific staff of Isfahan Ag۱·icultural and Natural Resourses Research Center and Scientific staff of tehran (Agricultural and Natural Resow·ses Research
m SEILSEPOUR

This study was canied out to evaluate the effect of wastewater quality in supp01t of nitrogen phosphoms and potassium lmder wheat cropping. The experiment design was split plot .The main factor was nitrogen as mea fe1tilizer in fom level , control (No), 50% of soil test (N9o), 75% of soil test(Nm) and recommended based on soil test(N1so). The sub factor was phosphoms and potassium with TSP and potassium sulfate feliilizer respectively in three level, control(PoKo), 50% of soil test (P12Kn) and recommended based on soil test (P24K2s). The result of analysis variance showed that there was not significant difference in the yield of seed and straw, weight of thousand seed, Length of ear and seed number of ear in all treatments and their interaction. The mean comparisons of results according to Duncan's multiple range test showed that the highest yield of seed and straw with 7139 and 12513.9 kg/ha respectively was obtained by applying N mPoKo. As a results, inigation with wastewater can decrease using nitrogen, phosphoms and potassium fe1tilizer without significant decrease in yield of wheat

wastewater quality, nitrogen, phosphoms, potassium, wheat