Significant abiotic disorders can be caused by:

Drought
Frost damage, and breakage by snow and hail
Flooding and poor drainage
Nutrient deficiency
Salt deposition and other soluble mineral excesses (e.g., gypsum)
Wind (windburn, and breakage by hurricanes and tornadoes)
Lightning and wildfire (also often man-made)

Soil compaction
Pollution of air, soil, or both
Salt from winter road salt application or irrigation
Herbicide over-application
Poor education and training of people working with plants (e.g. lawnmower damage to trees)
Vandalism