Infectious hazards:
(1) tetanus
(2) bacterial infection (Pseudomonas, Legionella, mycobacteria, Salmonella, Yersinia, etc)
(3) fungal infection (sporotrichosis, histoplasmosis)
(4) parasites (Baylisascaris, other)
Toxic exposures:
(1) herbicides and pesticides
(2) contaminated soil and water (heavy metals, radiation, etc)
(3) toxic plants
(4) spiders
(5) bees and yellow jackets
(6) silicosis
Weather:
(1) sun burn
(2) heat exhaustion
(3) frostbite
(4) trench foot
Trauma:
(1) puncture wounds
(2) falling objects
(3) blisters and bruises to skin
(4) animal exposure
Musculoskeletal:
(1) joints (back, knees, ankles)
(2) muscle strain
(3) over-exertion
Miscellaneous:
(1) poison ivy allergy
(2) phytophotodermatitis
(3) heart attack
(4) heartbreak (if animals eat all of the vegetables)