This study aimed to defining the knowledge level of rural leaders in area for the best usage of  the secondary crop, and defining the correlated relation between the knowledge level of rural  leaders and the independent studied variables. Data have been collected from (162) of rural leaders through personal meeting questionnaire, from some villages in Alexandria and Al-Behaira Governorates. The most important results are as follows:
-   (52.5%) of the rural leaders have medium knowledge level in area for dealing with secondary crop.
-   There is a significant correlated relation between the knowledge level and following variables:  Educational level, information recourses, civil and cultural status, communication with specialists, extension courses, and awareness of the environmental pollution.
-   The study revealed that there are some problems facing these leaders, which are:
-   Lake of knowledge of dealing with secondary crop.
-   Small numbers of the Extension guides.
-   High prices of the machines.
-   High rates of salaries of the trained workers.
-  And, Non availability  of the suitable training.