In Israel, there are a few institutions and schools which offer different training programs to international students and visitors. Among those institutes: Galilee Institute (offers Hi-tech agriculture in green house program), The Center for International Agriculture Development Cooperation, The Arava International Trainee Center, The Arava Institute, and The Golda Meir Training Center.
Each school and institute have different programs, some shorter or longer than others so Iv'e attached a link a at the end of my message that will send you to an article about the different schools, institutes and programs you can choose from and hopefully help you find the best one for you.