How to understand the definition of agricultural extension in textbooks? Please give an example.

Modern agricultural extension: it is a process of transmitting useful information to people (dissemination process), and then helping these people acquire necessary knowledge, skills and correct views, so as to effectively use these information or technologies (education process).

The connotation of agricultural extension, which is more suitable for China's national conditions, should be: using the principles of natural science and social science, adopting intervention forms such as education, consultation, development and service, and adopting methods such as demonstration, training and technical guidance to spread and popularize new agricultural achievements, new technologies, new knowledge and new information to rural areas and promote the sustainable development of agriculture and rural areas. The growth potential of cultivated land in China is extremely limited. Even in the case of decreasing year by year, the increase of grain output in China mainly depends on agricultural science and technology. According to the research of Sun Zhenyu and others, there is an obvious positive correlation between the grain yield per unit area and the agricultural extension funds and the coverage rate of improved varieties in China. While increasing agricultural output, agricultural extension also plays an important role in the adjustment of agricultural industrial structure, which provides a way for farmers to increase their income by introducing new varieties and improving product quality.