It is analyzed through the research that the main restricted factors affected the rural agricultural extension organizations in yi zheng lies in : the unconsummated of management mechanism , the serious shortage of the fund of agricultural extension , the unsteadiness of the rural agricultural extension group , the overall low capacity of the people , not quite properness of the professional knowledge structure , the low speed of the knowledge updating , unclear goals of part rural agricultural extension organizations , the phenomenon of not so well relationship among agricultural research , education and extension , scattered one household of the agricultural production way concerning lack of agriculture technique demanding elasticity , etc . agricultural extension has presented some new diversions under new condition of agricultural development 根据调查分析，影响仪征乡镇农业推广机构发展的制约因素主要有：管理体制不健全，农业推广经费严重不足，乡镇农业推广队伍不稳，人员整体素质偏低、专业知识结构欠合理、知识更新缓慢，部分乡镇农业推广机构发展方向不明，目前的农业科研、教育与推广存在相脱节现象，一家一户的分散的农业生产经营方式对农业技术需求弹性不足等。新形势下的农业发展对农业推广的要求也发生了新的转变。
The major factor was the technology of agriculture production in the influence factors of the economy growth of planting of hebei , the contribution ratio to economy growth in planting was 19 . 3 % , in which the improved seed , chemical fertilizer , plant protection was 4 . 3 % , 2 . 5 % , 2 . 3 % respectively ; manage technology was 9 . 8 % , in which the policy was 4 . 0 % , then manage regulation was 2 . 9 % and manage method 2 . 9 % ; the service technology was 9 . 3 % , in which the agricultural extension , the culture education , the agricultural science and research , and material supply were 2 . 5 % , 2 . 4 % , 2 . 3 % , and 2 . 1 % respectively 本文通过对近十年河北省农业劳动生产率和土地生产率指数比较研究，得出比较适合河北省农业发展方向的科技进步模式是以提高土地生产率为主导的模式。近十年来，在影响河北省种植业经济增长的因素中，主要是农业生产技术对种植业经济增长贡献份额较大，为19 . 3 ，其中，良种、化肥、植保的作用份额较大，分别为4 . 3 ， 2 . 5 ， 2 . 3 ；管理技术为9 . 8 ，其中方针政策为4 . 0 。
