In order to investigate the effect of animal manure application, in drought stress conditions, on soybean (Glycine max L.) quantitative and qualitative characters, an experiment in the form of split plot and based on randomized complete block design of four replications was conducted at Seed and Plant Improvement Institute, in 2004. Irrigation treatments as the main factor were in three levels of 50 (control), 100 (medium stress) and 150 mm (severe stress) water evaporation from Class A Pan, and manure application as sub plot at four levels of 0, 15, 30 and 45 t/ha. Plants were irrigated at 50 mm evaporation from pan of class A, from V3 germinative stage (trifoliate exposed). Drought stress decreased plant height, number of nodes, internode length, number of branches, number of pods and seed weight per m 2 as well as 1000 seed weight. Animal manure application reduced drought stress effects. The yield decreased with when drought stress intensity increasing. Increase in animal manure application increased seed yield. The highest yield was obtained in control with 2511 kg/h. Water stress reduced grain yield in medium and severe stress treatments by 22% and 39%, respectively. Application of 45t/h of animal manure produced the highest yield of 2244 kg/h. Increase in animal manure application increase caused in number of pods per m 2 and in 1000 seed weight. Seed oil content decreased while protein content increasing, when drought stress intensity increased. Animal manure exerted a significant effect on seed protein content, the lowest seed protein content being obtained at 45 t/ha of manure application.
