Aerial application of crop protection products is an essential tool for American farmers
Aerial Applicators annually treat:
127,000,000
acres of cropland
7,900,000
acres of pasture and rangeland
5,100,000
acres of forest land
4,800,000
acres for public health
Aerial Application is often the only tool to:
Expeditiously eradicate a pest before it destroys a crop
Treat crops on rolling hills or in fields with soil too wet for ground applications
Without it, the U.S. would see annual losses of:
1,690,000,000
bushels of corn
295,000,000
bushels of soybeans
199,000,000
bushels of wheat
548,000,000
pounds of cotton
3,330,000,000
pounds of rice
27,400,000
acres of cropland needed to replace the yield lost if aerial application was not available for these crops – An area roughly the size of Tennessee
The annual value of the industry:
$37,000,000,000
to farmers, input suppliers, processors and agricultural transportation and storage industries — For just the 5 crops listed above
Aerially-seeded cover crops have a climate impact:
3,800,000
acres of cover crop seeded annually
>2,000,000
tons of CO2 sequestered, equivalent to removing ~412,000 cars from the road
Industry Facts
- NAAA represents more than 1,800 members.
- In the U.S. there are approximately:
- 1,560 aerial application businesses (operations)
- 3,400 ag pilots
- ~2,000 are hired pilots
- ~1,400 are owner/operators (i.e. 87% of operators are pilots themselves)
- Aerial applications are conducted in all 50 states.
- Operations are located in 45 states—all but CT, HI, RI, VT and WV, according to NAAA records.
- Aerial applicators annually treat:
- 127 million acres of cropland are aerially treated each year—an estimated 28% of cropland in current production, taking into account some crops are treated aerially more than once in a season.
- 7.9 million acres of pasture and rangeland
- 5.1 million acres of forest land—Nearly 100% of forest protection applications are made aerially
- 4.8 million acres for public health and mosquito control
- The five most commonly treated crops among aerial application operators are corn, wheat/barley, soybeans, pastures/rangelands and alfalfa, but aerial applications are used on nearly all crops.
- The industry also provides aerial firefighting
- Aerial application is often the only, or most economic, method for timely pesticide application. It permits large and often remote areas to be treated rapidly, far faster than any other form of application.
- When wet soil conditions, rolling terrain or dense plant foliage prevent other methods of treating an area, aerial application may be the only remaining method of pest treatment.
- Aerial application is conducive to higher crop yields, as it is non-disruptive to the crop by treating above it and not within it. A study by a crop protection product manufacturer of applications on corn showed aerial application increased yield 8 percent more than ground application.
- Aerial application does not cause soil compaction, hence preventing soil runoff.
- The aerial application of crop protection products results in greater harvest yields of crops. This in turn results in less land being used for agricultural production, preserving important wetland and forest ecosystems important to carbon sequestration and habitat to threatened and endangered species.
- On average, each aerial application business has 2.3 aircraft, ranging in price from $100,000 to nearly $2 million depending on hopper size, engine type and engine size.
- 84 percent of the aircraft used are fixed-wing; the remaining 16 percent are rotorcraft/ helicopters.
- Of the combined fleet, 81 percent are turbine powered and 19 percent have piston engines.
- Ag aircraft are ruggedly built to handle 30 to 100 takeoffs and landings every day from rough landing strips, and they offer protection and good visibility for the pilot.
- Today’s aircraft utilize sophisticated precision application equipment such as GPS (Global Positioning Systems), GIS (geographical information systems), flow controls, real time meteorological systems and precisely calibrated spray equipment.
- Precision application equipment results in less pesticide product being applied to more acres and can ensure an even more targeted delivery by further mitigating off-target drift. The ability to precisely apply products also results in greater fuel efficiency.
- The average hired aerial applicator pilot has 19.4 years of experience in the industry, whereas the average aerial applicator operator has 27.9 years of experience.
- Ag pilots have their commercial pilots’ licenses. They also must be registered as commercial pesticide applicators in the states in which they make applications and must meet the requirements of Federal Aviation Regulations Part 137 which allows for low-level aviation operations.
- NAAA developed the Professional Aerial Applicators’ Support System (PAASS) to provide pilots continuing education about safety, security and drift mitigation. PAASS is attended annually by nearly 2,000 pilots and operators and has resulted in markedly improved safety and environmental stewardship statistics.
- NAAA’s Operation S.A.F.E. (Self-regulating Application & Flight Efficiency) program enables aerial applicators to attend fly-in clinics and have their aircraft professionally analyzed for spray pattern uniformity and droplet size.
- NAAA works with the federal government to invest in researching, developing and testing aerial application technologies to strengthen the safe application of crop protection products by air.
- Obstacles– From 2009 to 2018, 9 percent of aerial application fatalities were the result of collisions with towers, while collisions with power lines account for an additional 13 percent of the accidents and 12 percent of the reported fatalities in the industry. NAAA is urging the FAA to provide improved guidance on marking obstacles, including expanding tower marking guidance to include all guy wire and free-standing towers more than 50 feet in height.
- Funding– Federal funding for aerial application research must be maintained, as it improves the precision and efficacy of aerial application. In addition, USDA economists have found that every dollar invested in agricultural research has a $20 return to the American economy.
- NPDES Permits– NAAA is lobbying Congress to exempt duplicative, unnecessary and burdensome NPDES pesticide general permits for pesticide applications. The Federal Insecticide, Fungicide & Rodenticide Act requires the safety of pesticides to water before they may be registered for use.
- Taxes and User Fees – The current exemption for agricultural aviation from federal aviation fuel excise taxes must be maintained for ag aviators and they must be exempt from user fees. The majority of agricultural aviation operators do not use public airports; rather they use their own private landing strips and rarely, if ever, use or show up on the nation’s air traffic control system network because they are restricted category aircraft that fly at low altitudes in uncongested airspace.
- Taxes and User Fees – The current exemption for agricultural aviation from federal aviation fuel excise taxes must be maintained for ag aviators and they must be exempt from user fees. The majority of agricultural aviation operators do not use public airports; rather they use their own private landing strips and rarely, if ever, use or show up on the nation’s air traffic control system network because they are restricted category aircraft that fly at low altitudes in uncongested airspace.
Combatting Climate Change through Agricultural Aviation
The speed and efficacy of aerial application are why it is a critical part of agricultural production in the U.S. and why aerial application is part of the solution to tackling climate change. There are four significant ways aerial applications reduce greenhouse gases and improve the climate.
Aerial application plays a key role in maximizing yield on existing farmland and reducing the need to convert more land into cropland. Research conducted by Senarath Dharmasena Ph.D., Assistant Professor with Texas A&M University’s Department of Agricultural Economics, shows the importance of aerial application for higher yield agriculture for major crops in the U.S. His research, presented at the 2020 Ag Aviation Expo in Savannah, Georgia, looked at five crops: corn, wheat, cotton, soybeans and rice.
Dr. Dharmasena calculated the reduction in yield for each crop that would occur if aerial application was not available. Using data from the 2019 NAAA industry survey, it was determined that the aerial application industry is directly responsible for the production of 1.69 billion bushels of corn, 199 million bushels of wheat, 548 million pounds of cotton, 295 million bushels of soybean, and 3.33 billion pounds of rice annually that would be lost every year without the aerial application of pesticides. The total area of cropland needed to replace this lost yield is 27.4 million acres, an area roughly the size of Tennessee. This research covered only five crops, so it does not fully account for the 127 million acres treated by aerial application annually. Therefore, aerial application protects at least 27.4 million acres from being converted into cropland every year.
Dr. Dharmasena applied an average yield reduction of 25% when aerial application is replaced by ground application. This is in part due to the precision and efficacy of aerial application, as demonstrated with the yield differences referenced earlier, and greater productivity of aerial applications. Aerial applications can be made in a timelier manner than ground applications because of their ability to spray when the ground is wet and cover more ground in less time than a ground sprayer.
The productivity of aerial applications also plays a crucial role in managing pesticide resistance. All pesticides have a window when they are most effective on the targeted pest. Applications made after this window passes dramatically decrease the effectiveness of the pesticide, which can result in reduced yield and additional applications to attempt to control escaped pests. It can also speed up the development of resistance to additional types of pesticides.
To compare the productivity between aerial application and ground application in a row crop agricultural setting, an aerial applicator and ground applicator from Mississippi were asked to provide details about the productivity of their application equipment. The aircraft was an Air Tractor AT-502B with a 60-foot swath width, and the ground rig was a John Deere R4030 with a 90-foot boom. During an average 12-hour day, the aircraft treats 1,800 acres while the ground rig treats 450 acres, meaning aerial application is roughly four times as productive as ground application.
The greater productivity and efficacy of aerial applications result in greater pesticide efficiency. Graham Brookes and Peter Barfoot concluded that greater efficiency with pesticides helps farmers adopt reduced tillage production systems, which Bruner et al. show could reduce an additional 17.7 million metric tons of carbon equivalent annually if 25% of intensive or reduced tillage acres were converted to strip tillage or no-till soil management practices. Such a conversion would be equivalent to removing greenhouse gasses released by 3.8 million cars driven for a year.
Precision agriculture improves the accuracy and efficiency of all facets of agriculture and is heavily utilized in aerial applications. Precision agriculture technologies aerial applicators use include Global Positioning System (GPS) units, more effective nozzles and boom-lowering systems that position nozzles in less-disturbed air for improved application accuracy. According to NAAA’s most recent aerial application survey in 2019, 99.9% of aerial applicators use a high-tech navigational GPS to ensure a targeted application and also aid to prevent overspray, drift and unintended exposure to people or the environment.
Innovative technology exists that combines GPS, GIS based prescription maps and the variable rate flow controller to allow the product to be applied in varying dosages according to what the condition needs are in the field and targeting the material to be delivered only where it’s needed. This enables less product to be used, covering more acres, resulting in less potential for drift and less fuel used, both of which benefit the environment. Aerial applicators make liquid and dry variable rate applications to ensure pesticides, nutrients and seeds are applied at the precise rate needed in each section of a field.
Because it is the responsibility of the agricultural aircraft operator to be aware of sensitive areas when applying products, the majority of ag aircraft are also equipped with smokers. Smokers enable pilots to safely inject a small amount of vegetable oil into the aircraft exhaust system that results in smoke being created, allowing the pilot to determine, as the smoke moves in the atmosphere, the wind direction and an estimate of wind speed.
Another precision application system being used by ag aviators to ensure more targeted and efficient applications of crop protection products is the Aircraft Integrated Meteorological Measurement System, also known as AIMMS. AIMMS adds an additional layer to the precision ag system by incorporating a real-time onboard wind speed and direction measurement system. The atmospheric data collected by AIMMS is then synchronized with the GPS unit and GIS Software. This enables the variable rate flow controller to apply the product, factoring outside wind speed and direction, resulting in an even more precise application. Additional information on the precision application technologies used by aerial applicators can be found in the Fall 2018 issue of Agricultural Aviation.
Cover Crops
One of the most promising conservation practices aerial applicators can assist farmers with is cover crops. Cover crops are grasses, legumes, small grains and other low-maintenance crops planted specifically to improve soil health and biodiversity. By sowing the seeds aerially with a preharvest cover crop application, cover crops control erosion, retain and recycle soil nutrients, build organic matter to improve soil health, improve water quality and moisture availability, and break disease and insect cycles.
While there are several methods of seeding cover crops, aerial application is the most effective means of applying cover crops successfully. The best time to apply many cover crops is when the harvestable cash crop is still standing. Aerial application offers the ability to spread the cover crop seed over the existing crop without any disruption to the standing crop. This means the cover crop can already be established when the cash crop is harvested. Using a drill to plant cover crops requires a terrestrial vehicle and for the grower to wait until their cash crop is out of the field, which might not be the best timing for establishing a healthy cover crop. This can be especially true in northern parts of the U.S. where the first frost can interfere with cover crop growth if they are seeded too late. Aerial application can also be used when the soil is wet and can seed many acres quickly. As timing is a critical part of successfully establishing a healthy cover crop, it is clear that aerial application offers benefits over all other methods of seeding cover crops.
Quick growing cover crops hold soil in place, protecting against erosion from wind, rainfall and snowmelt. By slowing erosion and run-off, this in turn helps protect water quality by reducing sediment in streams, rivers and lakes.
Soil health is improved as decomposing cover crops add natural nutrient compounds to the ground, including nitrogen. Subsequently, this reduces the need for future nitrogen fertilizer applications, lowering the production cost of cash crops and reducing fertilizer runoff. Reducing the need for fertilizer makes cover crops ideal for improving soil health over a large area. Aerial applicators are uniquely qualified to help farmers seed cover crops in this regard, due to the speed and precise timing of aerial application and longer timeframe an aerially applied cover crop has to grow, aerate and contribute natural nutrients and moisture to the soil.
The roots of cover crops increase water-holding capacity, reducing susceptibility to drought. Leaves of cover crops provide shading, which can help control the rate of evaporation from the soil. Per the Plant and Soil Sciences eLibraryPro, under a well-developed crop canopy “the initial evaporation rate for a wet soil surface will be lower and the surface will dry much more slowly.”
The roots of the cover crop improve soil structure by creating passages that allow for increased moisture and aeration. Soil compaction is essentially eliminated when seeding is done with aerial application.
One of the most promising conservation practices aerial applicators can assist farmers with is cover crops. Cover crops are grasses, legumes, small grains and other low-maintenance crops planted specifically to improve soil health and biodiversity. By sowing the seeds aerially with a preharvest cover crop application, cover crops control erosion, retain and recycle soil nutrients, build organic matter to improve soil health, enhance water quality and moisture availability, and break disease and insect cycles.
Growing cover crops is a way that agricultural production can increase soil carbon sequestration, which involves removing and storing carbon dioxide from the atmosphere. The average emission reduction coefficient (ERC) for cover crops grown in cool temperate moist and warm temperate moist zones reported in Bruner et al.’s study “Combatting Climate Change on US Cropland: Affirming the Technical Capacity of Cover Cropping and No-Till to Sequester Carbon and Reduce Greenhouse Gas Emissions” is 0.495 metric tons of CO2 per acre per year. Data from the 2019 NAAA industry survey shows that aerial applicators seed 3.8 million acres of cover crops annually. This means that aerial applicators are responsible for helping to sequester 1.9 million metric tons of CO2 equivalent annually, which, according to the EPA, would be the equivalent of removing approximately 412,000 cars with carbon-combustion engines from the roads each year.
The Bruner et al. analysis further found that if cover crops were grown on an additional 15% of available U.S. cropland acres, there would be an additional reduction of 11.9 million metric tons of carbon equivalent—or the equivalent of removing from the roads annually approximately 2.6 million cars with carbon-combustion engines. Aerial application will play a key role in increasing the acres of cover crop grown. While there are several methods of seeding cover crops, aerial application is the most effective means of applying cover crops successfully. The best time to apply many cover crops is when the harvestable cash crop is still standing. Aerial application offers the ability to spread the cover crop seed over the existing crop without disrupting the standing crop. This means the cover crop can already be established when the cash crop is harvested. Aerial application can also be used when the soil is wet and can seed many acres quickly. The Soil Health Partnership recognizes that aerial application’s ability to apply seed earlier in the year results in better growth and overwintering of cover crops. Michigan State University Extension also recognizes that aerial application is a good option for applying cover crops.
Yield Benefits
More and more evidence continues to be collected about the benefits of aerial application compared with other forms of application. Aerial application’s speed is obviously one attraction, which helps in quickly eradicating a crop threat. Aerial’s ability to treat in conditions and locales where other forms of application can’t is another one of its benefits. The ability to treat in multiple conditions also results in better timing, enabling the farmer to treat the crop at its most efficacious point regardless of field conditions. When excessive rain hits, farmers rely on aerial fertilizer and other crop input applications because it’s the only method available to access their fields.
With all those benefits stated, the research that continues to accumulate most readily on aerial’s benefits focuses on how it prevents runoff of essential topsoil and prevents soil compaction which can result in a less hospitable growing environment for a crop and reduce yields, nutrients and moisture. Higher yields are also due to aircraft treating above the crop canopy and not in the crop canopy where ground rigs can trample a portion of the crop, again ultimately reducing its yields. These studies are not only good news for aerial applicators to share with their current or prospective farmer-customers but also good news to help in developing a more friendly policy environment for aerial application. Industry sage Bill Lavender recently forecast that the agricultural aviation industry’s future will always be in demand because of the pressure to produce higher and higher yields. Lavender wrote that “environmentalists work in our favor when they protect forests and wetlands from cultivation … [because] we have to produce more food on less land. The best way to do that is incorporating ag aircraft in the plan for higher yields.”
A handful of food companies, including Cargill, Coca-Cola, PepsiCo and Wal-Mart, made commitments to reduce their carbon footprints as part of a White House initiative to get the private sector to do more to fight climate change. As part of those commitments, these companies plan to reduce greenhouse gas emissions by 5 percent and improve water and energy efficiency by the same amount over the next five years. High-yield agriculture using aerial application to maximize those yields will be a key component for these food producers and suppliers to meet their commitments.
Purdue University: 2007 Study Showing ground rigs damage approximately 1.5% – 5% of soybean crops
Nebraska Dept. of Aeronautics: In 2015, used the Purdue Study to show ground rig damage to corn costs NE farmers 6,336,000 bushels ($34M) annually
Kansas State University & University of Illinois: 2008 Study showing an 18.6 bushel-per-acre yield increase in corn aerially treated with fungicide
AgriNews: 2015 Article on an Illinois Aerial Applicator conducting late-timed (R2) aerial fertilizer applications on soybeans to increase yields by 10-15 bushels over the 70-bushel base yield
University of Minnesota: Extension website collecting research indicating soil compaction can negatively impact crop yields, in addition to decreasing water infiltration and storage, decreasing root growth and reducing soil volume explored by the roots