This study aimed to define the extensioncommunication methods that be exposed to farmers, and its relationship with the level of their knowledge in the area of dealing with Secondary Corps.
-   Data have been collected from (180) farmers, through personal meeting questionnaire, from some villages in Alexandria and Al-Behaira Goverrnorates.
- Percentages, Frequents, and Simple Correlation Coefficient (Person) have been used in data                 analyses in this study.
The most important results are as following:        
1- About (40%) of the respondents have low level of knowledge, while, only (23 %) of them have high level of knowledge about dealing with secondary corps.  
2- (53.3%) from the respondents have low degrees of exposure for extension communication methods, while (16%) of them have high degrees of exposure to the extension communication methods.
3- There is a positive and significant correlated relation, at probable level 0.01, between the degree of the exposure of farmers and the following variables: extension seminars, visiting to farms, extension meetings, and extension farms, and between the levels of knowledge of the respondents.
4- Also found, there is a positive and significant correlated relation, at probable level 0.05, between the degree of the exposure of farmers and the following variables: practical demonstration, extension prints, and rural T.V. programs, and between the level of knowledge of the respondents.
5- The study revealed that there are some problems facing these farmers, which are:
 - Lake of knowledge of dealing with secondary corps.
 - Lake of extension training.
 - High prices of the machines.
 - High rates of salaries of the trained workers.