The definition of a farm worker is a person who works in the field!
The fact that you may be a supervisor, researcher, or farm advisor doesn't make you exempt from these regulations.
California Department of Pesticide Regulation Training Pamphlets
Cal-OSHA's permanent heat illness regulation became effective July 27, 2006. The regulation, which is in Title 8: section 3395 of the General Industry Safety Orders, requires employers to provide water and shade to outdoor workers and training for these workers and their supervisors on the symptoms and treatment of heat illness.
Heat related illness prevention and information
Cal OSHA Heat Advisory || Español
Cal/OSHA heat illness prevention newsletter - what you need to know || Español Protect yourself from heat illness || Protejase de las enfermedades causadas por el calor
Links to Pesticide Related Sites
Pesticide Applicators Professional Association
DPR Licensing and Certification Program Licenses and certificates, index by name
Department of Pesticide Regulation Selected Publications (Can be Downloaded)
Available Publications: Worker Protection Standard
References on Heat Stress Physiology and Control from UC Berkeley