Agricultural Spraying Operations

  1. Types of Agro-Chemicals

Agricultural drones spray different types of chemicals based on crop requirements:

  • Pesticides: Used to control insects and pests.
  • Fungicides: Protect crops from fungal diseases.
  • Herbicides: Used to kill unwanted weeds.
  • Liquid Fertilizers / Nutrients: Provide essential nutrients for plant growth.
  • Bio-solutions / Organic sprays: Eco-friendly alternatives for safer farming.

Each chemical has specific dosage and mixing guidelines that must be followed strictly.

  1. Spray Mixture Preparation & Tank Filling

Correct mixture preparation ensures effective and safe spraying:

  • Read the chemical label for recommended dosage.
  • Use clean water to avoid nozzle blockage.
  • Mix chemicals in a separate container before pouring into the drone tank.
  • Use a filter/mesh to avoid dirt entering the tank.
  • Fill the tank only to the recommended maximum capacity.
  • Secure the tank lid properly to prevent leakage during flight.

Proper mixing ensures uniform coverage and prevents damage to crops and equipment.

  1. Nozzle Types & Calibration

Nozzles determine spray droplet size and coverage pattern:

  • Flat fan nozzles: Ideal for uniform crop spraying.
  • Hollow cone nozzles: Best for penetrating dense crops.
  • Air-induction nozzles: Reduce drift in windy conditions.

Calibration includes:

  • Adjusting flow rate (liters per minute).
  • Setting correct droplet size (fine, medium, coarse).
  • Ensuring even spray distribution.

Good calibration improves effectiveness and reduces chemical waste.

  1. Field Coverage Patterns

To ensure the whole field is sprayed evenly:

  • Use automated waypoint missions for accurate paths.
  • Maintain proper flight altitude according to crop height.
  • Follow parallel flight lines with correct overlap.
  • Avoid spraying the same area twice.
  • Maintain constant spraying speed and tank pressure.

Proper coverage ensures uniform treatment and saves chemicals.

  1. Drift Management

Drift is when spray droplets move away from the target area due to wind.
To reduce drift:

  • Spray only at wind speeds below 10–12 km/h.
  • Use drift-reducing nozzles.
  • Maintain recommended altitude (2–3 meters above crop).
  • Avoid spraying during very hot or dry conditions.
  • Keep the drone speed stable.

Good drift management prevents chemical loss and protects nearby crops and people.

  1. Safety in Pesticide Handling

Safety is the highest priority in spraying operations:

  • Always wear PPE (gloves, mask, goggles, apron).
  • Avoid direct contact with chemicals.
  • Mix chemicals in well-ventilated areas.
  • Do not eat or drink while handling chemicals.
  • Wash hands and equipment after spraying.
  • Store chemicals safely, away from children and animals.

Following proper safety measures protects the operator, environment, and crops.

PreviousNext