Table 1 Alphabetical listing of recognized Safety and Physical Hazards, Biological and Chemical Hazards, and Diseases pertinent to agriculture. [Adapted from (8)]
Safety and Physical Agents:	Biological and Chemical Agents:	Agricultural Diseases:
Commodity storage & transfer Electricity Ergonomics Back injury Lifting Repetitive trauma Farm machinery Balers Chain saws Combines Power take-off    (PTO) Roll-over protection Safety guards Tractors Fire Fuel storage    (leaks and fires) Illumination    (poor lighting) Lightning    (shock and fire) Liquefied Propane [LP] gas Liquefied anhydrous ammonia Livestock handling injuries Physical/environmental hazards Noise Thermal    (heat and cold) Ultraviolet    (sun light) Vibration Psychological stress Sanitation    (field) Transportation    (on & off road) Welding	Asphyxiation/suffocation Confined space Entrapment    (see commodity s.&t.) Fumigation Carbon Monoxide    (combustion) Silo gases    (NO2 and CO2) Detergents Diesel exhaust Disinfectants including Chlorine Quaternary ammonia compounds Organic iodides Cresol-based compounds Formaldehyde emitters Dusts    (inorganic aerosols) Hydrogen sulfide    (a key manure gas) Microbiologic organisms Infectious microbes Mold spores    (mycotoxins) Noninfectious bioaerosols Parasites Nitrogen dioxide    (silos & welding) Organic dusts - e.g. Cotton dust Endotoxin    (on many organic d.) Grain dust Sugar cane (bagassosis) Wood dust Pesticides    (including application and          harvest activities)	Arthritis Dermatoses - caused by Heat Irritant chemicals Infectious microbes Insects Sensitizing chemicals Sunlight Noise Induced Hearing Loss Immunologic diseases Allergic rhinitis Asthma Dermatoses Noninfectious diseases Cancer    (is actually a low risk) Hypertension and heart Respiratory diseases Asthma    (also immunologic dis.) Bagassosis    (from sugar cane) Bronchitis Byssinosis    (from cotton dust) Farmer's Lung    (see also HP below) Hypersensitivity pneumonitis Organic dust toxic syndrome    (ODTS) Pneumoconiosis    (e.g. silicosis) Silo filler's disease    (see also NO2) Organophosphate poisoning and sequelae Silo unloader's disease Zoonotic diseases

Table 2 Labor Intensity During Harvest
		Low	High
Labor Intensity While Growing	Low	Mechanized Crops (e.g. cotton, grain, processed tomatoes, and nut crops)	Bush & Tree Crops (e.g. tobacco, stone fruit, and citrus)
	High	Livestock (e.g. cattle, swine, poultry)	Row Fruits & Vegetables (e.g. strawberries, lettuce, and flowers)

Table 3 Distribution of 542 farm deaths by causative agent [adapted from (15)]
Fraction of Deaths	Causative Agent	Comments (breakdown within agent)
51%	Farm tractors	57% rollovers; 9% fall-offs/run-overs
11%	Buildings and structures	33% grain suffocation; 13% silo-gas
6%	Farm trucks	Mostly non-highway accidents
4%	Barnyard equipment	e.g. augers, skid loaders
4%	PTO/ power take-off	Drives attachable implements
3%	Electrocutions	Overhead wires only
3%	Haying equipment	Entanglement, especially in round balers
3%	Farm animals	Mostly bulls and horses
15%	Other