Variable rate application

[1] This is different from uniform application, and can be used to save money (using less product), and lessen the environmental impact.

Planters and drills can be made into VRA sensors, by attaching a motor or gear box.

The seeding rates can also be connected to match the application of agrochemicals.

[1] For variable rate weed control you need both a task computer and a system to physically change the flow rate of the agrochemicals.

[2] Variable rate fertilizer spreaders can be used to increase or decrease fertilizer application rate, using a global positioning system (GPS).