determination of suitable sowing date for faba bean c.v. barakat for double cropping of cotton and faba bean

to determine the effect of sowing dates (22 oct., 5 nov., 21 nov. and 5 dec.) on the green pod and dry seed yield of faba bean (vicia faba), field experiments were conducted using rcb design with four replications for three cropping seasons (1995-1998) at hashem abad research station in golestan province. result, of combined analysis of variance showed that 22 oct. and 21 nov. produced higher green pod yield of 20440 and 20540 kg/ha, respectively. in cotton growing area of golestan it is important to plant cotton after harvesting of faba bean green pods, as soon as possible, for using soil moisture to prepare bed for cotton seed. there was no significant difference between yield of 22 oct. and other dates of sowing. it is therefore, suggested to plant faba bean as early as 22 oct. for green pod. the results of combine analysis of variance on dry seed yield also showed that the highest seed yield (3861 kg/ha) were produced from 21 nov. sowing date. therefore, faba bean may be planted on 21 nov. for dry seed production.