Approximate air speed at boom height*	Beaufort Scale	Description		Visible Signs	Spraying
Less han 2 km/h (Less than 1.2 mph)	Force 0	Calm		Smoke rises vertically	Only use medium or coarse spray quality
2 - 3.2 km/h (1.2 - 2 mph)	Force 1	Light air		Direction shown by smoke drift	Acceptable spraying conditions
3.2 - 6.5 km/h (2 - 4 mph)	Force 2	Light Breeze		Leaves rustle, wind felt on face	Ideal spraying conditions
6.5 - 9.6 km/h (4 - 6 mph)	Force 3	Gentle Breeze		Leaves and twigs in constant motion	Increased risk of spray drift. Take special care
9.6 - 14.5 km/h (6 - 9 mph)	Force 4	Moderate		Small branches moved, raises dust or loose paper	Spraying inadvisable

Contact

Contact : John Rhys Owen
Address: JR Owen Crop Sprayer/Tester, Bryn Teg Llanwnda Caernarfon Gwynedd, LL54 5TG
Email: jrowencropsprayers@gmail.com
Telephone: 07717 496705