Long-term data (13-18 years) from 15 experimental farms were used to evaluate quantitatively the risk of maize cultivation on drylands in different regions of Bulgaria. Results established that the risk of maize cultivation on drylands in north Bulgaria seldom surpasses 10% of the years. Losses in south Bulgaria cover 20-70% of the years. Only on soils of high water-holding capacity is the risk close to 20%.
