There are a few institutions in Israel which offer different short and long term courses or training programs in the field of agriculture to international students, visitors and professionals. Among those institutions: The Arava Institute, The Golda Meir Training Center, The Center of International Agriculture Development Cooperation and more.
Each school and institute offers a different programs, some shorter or longer than others, and some also offer financial aid and scholarships. 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.
I advise you to contact all of them because as i said before each course and program is different so one might offer something the other can't.