Development of human settlements, especially rural settlements has been largely dependent on ecological factors like suitable soil and water. Sabzevar region, enjoying all of these facilities, has Langley been a major human population center in eastern Iran. The study results show that, there is a Significant relationship between ecological factors like situation, water and farming lands and population changes as an index of rural population stability in 1966-2006, the Correlation between village Situation and annual growth rate was 0.216. Considering the study results, the following tasks are recommended to sustain the rural residency: efficient utilization of soil and water resources, supporting the rural economy, management of farmlands, deciding the farming patterns, correction of water consumption method.

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