中文摘要：

退耕还林工程是典型的农业生态经济联合生产．通过对陕北退耕区典型农户的案例分析，考察了安塞县和米脂县典型退耕区的农业联合生产水平，并对导致联合生产水平差异的原因进行探讨。结果表明：农业联合生产的水平取决于多种因素，产品特性、耕地规模、环境条件对联合生产水平影响不明显；政策制度，农户的个人素质、风险偏好态度等对联合生产水平具有重要影响。

英文摘要：

The conversion of cropland to forestland program is a typical agricultural joint production. This paper highlighted the level of joint production about typical famers based on case investigation of northern part of Shanxi province, and discussed the reasons of the difference. The result showed that the level of agricultural joint production were depend on many kinds of factors, characteristics of products, land scale and environment had no obvious effect , policy and regulations, characteristics of farmer and risk preference had an important influence on it.