A professional who performs any combination of following duties to provide ground support for airplane pilot engaged in aerial seeding and fertilizing of fields and dusting of crops. Respnsibilities include:

• Mixes fertilizers and pesticides according to prescribed formulas, and loads seeds, fertilizers, or pesticides onto airplane.
• Pours or pumps materials and seeds into feed hopper of airplane.
• Signals pilot when propeller is clear of people and obstructions to take off and to dust or spray fields.
• Waves flag or stands on edge of field to mark flight passes for pilot to prevent skips and overlaps.