Analysis (2) pays (1) analyse (1) ethnologie (1) écologie (1) désertification (1) Tunisie (1) Instruction and study (1) Ecology (1) Testing (1) Deterioration (1) Reliability (1) Preservation (1) Conservation (1) Causes (1) Assaying (1) Agriculture (1) Moisture (1) Methodology (1) Specimens (1) Securities industry (1) Wood (1) Water (1) Waste lands (1) Values (1) Suffering (1) Soil-binding plants (1) Slopes (Physical geography) (1) Seepage (1) Securities (1)