International Symposium on
Drylands Ecology and Human Security
Facilitating Learning to Combat Desertification
Mohammad Sadegh Allahyari1 & Mohammad Chizari 2
1 Department of Agriculture, Islamic Azad University-Rasht Branch, Iran
2 Agricultural Extension & Education Department, College of Agriculture, Tarbiat Modarres University, Tehran, Iran
Nowadays, more than one third of total world lands are exposed to severe erosion, and every year 5 to 7 millions hectares of good farming lands due to lack of appropriate management, use of inappropriate farming practices, excessive pasturing and etc, as a result of erosion and degradation are annihilated. During the last century, about 2000 million hectares of lands as a result of erosion is annihilated .this problem led to the main apprehension of man in present time, meaning that nourishment and food security faces to the worst situation.