Ecology of dry land course in Israel
Hello Melkzedek,
There are a few institutions in Israel which offer different short term courses and training programs that can fit all of you options, among them: The Arava Institute, The Golda Meir Training Center, The Center of International Agriculture Development Cooperation and more.
Each school and institute have a different program, some of the programs could be shorter or longer than others and some offer scholarships to international students so I've 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.
To get the study program of a specific course you'll have to contact the school in which you wish to study directly.