Aerial application

Using the correct equipment for aerial precision

There are many ways to apply both liquid and dry granules from the air, however only a very limited number of mechanisms that are capable of aerial precision. Furthermore the correct equipment still presents a myriad of factors that have to be controlled to increase the precision outcome.

Granular Products will only allow our accredited aircraft to use either a Meterrate® or an Isolair® type of equipment for fixed winged aircraft and helicopters. These mechanisms have been specifically designed for low rate, precision application and not designed for fertiliser application or fire-bombing.

After installation these mechanisms need to be “Pattern Tested” for every different product that is to be applied. Different products have different spread dynamics and swath widths. “Pattern Testing” identifies what an effective swath width is and whether there is an uneven distribution across the swath, the testing then allows the operators to adjust their set-ups to correct any issues.

SprayCheck P/L, Australia’s only Pattern Testing Company, has seen and corrected a range of aircraft. Some liquid applicators had Co-efficients of Variation (CoE) of up to 65% (a variation of 32.5% (nearly a third) above and below the prescirbed application at the target) and granules with a CoE of up to 45%. Granular products will only accredit aircraft with a CoE of less than 10% (maximum of 5% above and below).

The advantages of granules over liquids for aerial application and spread dynamics are considerable. SprayCheck has stated that a well set-up liquid application will still have a CoE of 20%, which is due to small droplet drift, evaporation and wind issues, all of which do not affect granules.

Granules with a high bulk density allow for high coverage at low weight applications, while liquids need large quantities of water to achieve a similar coverage. If low water rates are used then coverage will be compromised and actives like Flupropanate will be unable to efficiently get to the soil. Gravity ensures that the granules deliver the active to the soil and target, while liquids will be caught within the biomass and canopy and most probably dry, until the next rain event.

Our Aerial Operators

Granular Products Accredited Aerial Operators are experienced in the application of granular herbicides, they have specialised equipment to apply our products including a Transland Meter-Rate for fixed wing aircraft, combined with GPS guidance, data logging and pattern testing to maximise application efficacy.

Moura, QLD

Moura Aerial AG
(07) 4997 1844
0429 401 500

Emerald, QLD

Central Highlands Aerial Services
(07) 4987 5537

Cooray, QLD

McDermott Aviation
(07) 5447 6600

Boggabilla, QLD

Air Ag Pty Ltd
(07) 4676 2236

Mudgee, NSW

Commercial Helicopters
(02) 6372 7622

Kingaroy, QLD

South Burnett Air Services
(07) 4163 6971

Cowra, NSW

Fred Fahey Aerial Services
(02) 6342 9256

Meandarra, QLD

Precision Aerial
(07) 4665 6600

Bachelor, NT

Aerotech
(08) 8981 1767
0419 854 448

Rockhampton, QLD

Granular Products Aerial
(02) 6362 8220

Rockhampton, QLD

Drone Agriculture
0427 283 422

Davenport, TAS

Tasmanian Helicopters
(03) 6426 1623