successful extension systems. However, it is clear that the consequences of extension in China are more related to basic political factors than to the specific characteristics of the extension system. C. Potential Problems in Extension Systems It is reckless to make generalizations about extension programs, considering the wide diversity of experiences. Nevertheless, three types of problems sometimes limit the ability of an extension system to serve the needs of the rural poor. The first problem is that extension systems can be directed by an urban-based political system to benefit urban interests. Secondly, for a variety of reasons, extension agents may work primarily with the rural elite. Thirdly, extension systems create their own bureaucracies which can generate their own bureaucratic and personal interests. These factors mean that the actual results of many extension systems, regardless of the rhetoric, may be other than helping the rural poor. 1. Urban Control. Agricultural extension systems usually are not controlled by farmers themselves. George Axinn notes that only 13 out of 78 extension systems around the world involve some funding from farmers or local government. Instead, extension systems are funded and are controlled entirely by governments, which are often obligated to give priority to urban political forces. Frequently, they have specific, narrow goals, production of cash crops, such as cotton, peanuts, cocoa, coffee, rubber, etc. to obtain foreign exchange for urban luxury consumer 1George Axinn, "Agricultural Research, Extension Services, and Field Stations," in International Encyclopedia of Higher Education (San Francisco: Jossey-Bass, 1978), p. 243.