Как их перевести

agricultural agent
national extension director
state extension director
extension education

Текст –

Farmer education by means of the extension system grew rapidly. Now virtually every one of the nation's more than 3,000 counties has its county agricultural agent, and some counties employ several assistant agents. The federal and state funds paid the agents mainly. A national extension director who, with his staff, has offices in Washington heads the system. The states and counties, however, largely control the actual work. The state extension director works closely with the agricultural college and the experiment stations in his state; in fact, he may also be dean of the college or director of a station. On the state director's staff will be a number of specialists. Each specialist is an expert in his particular field, which may be poultry, fruits, vegetables, dairy cattle, beef cattle, hogs, or some other important farm products in his state. The specialists help farmers through the county agents. When the extension education was new, demonstration of improved methods took most of the county agent's time. Nowadays the county agent's offices essentially information centres where farmers come for facts and advice.

Спасибо всем!

(Вы, кстати, гляньте свой пост о бесплатном "сыре" :-))