The effect of irrigation number with combination of pho.sphorus and potassium fertilizer levels on seed yield, yield components and quaii4’ of field bean was studied in two field experiments at the Agricultural Research and Experimental Center, Facuhy f Agriculture, Moshiohor Zagazig University, Benha branch during 1992.93 and 1993,94 seasons. The results indicated that plant height, seedy weightplant, 100- seed weight and seed 1/teld/feddan sign iji candy increased by increasing the number of irrigation in both seasons, whereas the nuni her of branches and podc per p/ant, absorption percentage and phosphorus percentage in seeds offiuba bean significantly increased by increasing number of irrigation in one season out of two . Two irrigations gai e the highest signijicantly protem content in seeds of frtha bean during the two .sasons . On the other hand, increasing irrigation to 4 watering had no significant effect on potassium percentage. The plant heighi, number of branches/plant, number of pods/plant and potassium percentage in seeds of faha bean were signijicantly affitcted by the application P and K combinations in the second season only . Increasing P--K ftrtilization levels sign ificantly increased pod weight’piant, seeds weight p/ant, seed yield feddan and absorption percentage in ho//i sea.cons . The highest seed’yie/dfeddan was obtained by adding 16 P205— 24 K2() in the first se/ison, 32 P205 -zero K20 in the second one . JIowe ver no significant difference between the combination of» and K level