Spraying is the operation commercial farms repeat more than any other. It happens dozens of times a season, it consumes the largest share of your chemical budget, and it decides whether a pest outbreak becomes a yield loss or a line item. Yet spraying equipment is often chosen the way a pickup truck is chosen — by brand habit, dealer proximity, or whichever model was on the lot.

That approach gets expensive. The sprayer you buy fixes, for the next several seasons, how much chemical you waste, how much water you haul, how many spray windows you get before the wind shuts you down, how much crop you drive over, and how many people you expose to pesticide.

This guide walks through the selection decisions in the order they actually matter, and anchors every technical figure to the equipment documentation of Hefei Duojia Agricultural Technology Co., Ltd., an intelligent agricultural machinery manufacturer whose product library covers self-propelled sprayers, unmanned and remote-controlled sprayers, crawler plant protection robots, anti-drift air curtain booms, variable spray systems, variable rate nozzles, fertilizer spreaders, and the drivetrain components behind them.

1. What Actually Drives Spraying Cost on a Commercial Farm

Before comparing models, it helps to name what you are trying to buy. On a commercial operation, spraying cost is rarely dominated by the purchase price. It is dominated by six recurring factors:

1. Chemical waste. Over-application, off-target deposition and drift all consume product that never reaches the target.

2. Water volume. Every litre carried is a litre transported, pumped, and refilled. High-volume spraying multiplies logistics cost per hectare.

3. Spray windows. A machine that cannot work in wind forces you to wait. Waiting compresses the season and pushes applications past the optimal growth stage.

4. Labour exposure. Manual spraying puts operators directly in the chemical path, which drives protective equipment cost, health risk and staff turnover.

5. Crop damage. Wheel tracks in a standing crop are a permanent yield deduction in that row.

6. Refill and turn downtime. Tank size, boom width and turning radius decide how much of the day is spent spraying rather than driving back to the water point.

A machine that is cheap to buy but weak on these six points will cost more across a season. The rest of this guide maps each factor to the specifications that control it.

2. Step 1 — Start With the Application Scenario, Not the Machine

Machine structure follows scenario. The same manufacturer will recommend entirely different equipment for an open field block, a dense orchard, and a greenhouse, because the limiting constraint changes: in an open field it is working width and wind; in an orchard it is passability and spray penetration into the canopy; in a greenhouse it is machine size and operator safety.

The scenarios a commercial farm needs to classify are:

If your farm spans more than one of these — a common situation for mixed operations — the productive approach is usually one high-capacity machine for the bulk open-field hectares plus one small, highly manoeuvrable unit for the awkward areas, rather than a single compromise machine that does neither job well.

3. Step 2 — Choose the Machine Structure

Spraying equipment is offered in three structural configurations, and the choice is a straightforward trade between utilisation rate and cost per hectare:

• Self-propelled — the sprayer carries its own engine and chassis. Highest capital cost, highest daily output, best for farms where a single machine will be busy across a large area.

• Mounted — the spray system is carried on your existing tractor. Lowest incremental cost, and the right answer when you already run a fleet and want to convert available horsepower into spraying capacity.

• Trailed — a separate tank and boom pulled behind a tractor. Large tank volume without a dedicated self-propelled chassis, good for very high water volumes or long refill intervals.

Self-propelled is where the widest range of capability exists today, including unmanned self-propelled machines that remove the operator from the cab entirely. The sections below use the self-propelled range as the reference case because it exercises every selection variable at once.

4. Step 3 — Size the Tank and the Boom to Your Blocks

Tank capacity and boom width together determine how long you spray before you drive back to refill, and how many passes each block needs.

4.1 Field boom sprayers

Unit convention used throughout this guide: 1 mu ≈ 0.0667 ha. Hectare figures are approximate conversions of the published mu/h ratings.

Two observations follow directly from the table.

Boom width matters more than tank size for productivity. The 3WPZ-1500C reaches ≥ 130 mu/h (≈ ≥ 8.7 ha/h) with a ≥ 18 m boom and a 1500 L total tank distributed as two 750 L tanks on either side of the machine. The 3WPZ-3000 carries twice the liquid — 3000 L — on a 20 m boom and works up to 100 mu/h (≈ 6.7 ha/h). Large tank volume buys fewer refills; wide boom buys speed. Which one you need depends on your water point logistics.

Efficiency scales with boom width, not with tank capacity. Where the same crop and field apply, the 7 m machines (3WYP-160, 3WYP-270, 2FZH-200) all publish 40 mu/h (≈ 2.7 ha/h), while the FM-20 air curtain boom reaches 200 mu/h (≈ 13.3 ha/h) on a 20 m working width.

4.2 Orchard and specialised machines

The 380C is the wide-coverage orchard and field option: 5 nozzles per side producing a spray width of at least 30 m, a tank of at least 380 L, and an endurance of 15 hours or more. The 3WZD-200 trades width for passability — a 1420 × 1100 × 720 mm crawler chassis that turns in place and works slopes up to 30°, which is what a dense orchard actually demands.

5. Step 4 — Get the Running Gear Right, or Pay for It in Crop Damage

Wheel tracks are a yield cost that never appears on an invoice, which is why it is usually the most under-specified part of a sprayer purchase. The selection levers are drive layout, steering geometry, track settings and ground clearance.

Drive layout. Four-wheel drive is the standard for machines expected to work in wet or heavy going, and it is specified on the 3WPZ-3000, 3WYP-270 and 3WYP-50B. The 3WPZ-3000 additionally uses concentric steering with the front and rear wheels running on the same track, which is the mechanism that directly reduces crop pressing and keeps energy consumption low. The 3WYP-270 uses articulated steering; the 3WYP-160 / 160B use three-wheel drive with front-wheel steering; the 2FZH-200 uses front-wheel steering with three-wheel drive.

Adjustable track. Fields do not have a single row spacing, so fixed track machines force a compromise. The 3WPZ-1500C offers an adjustable wheel track of 2200–2600 mm; the 3WYP-160 offers an adjustable rear wheel track of 1750–2100 mm. Both let you place the wheels in the inter-row gap rather than on the crop.

Narrow wheels. Wheel width is the other half of the crop-damage equation. The 3WYP-270 uses a narrow wheel design of 2–4 cm, as do the 3WYP-160 / 160B. The 2FZH-200 goes narrower still at 2–3 cm, and publishes a crop damage rate in wheat fields of only 0.28% — one of the very few hard numbers available for this cost, and a useful benchmark when comparing machines.

Ground clearance. Clearance decides whether you can spray a crop after it has canopied. The 3WPZ-3000 provides 1030 mm ground clearance; the 3WPZ-1500C specifies a main beam ground clearance of at least 1700 mm with a boom height adjustment range of 400–3300 mm; the 3WYP-160 provides 1.1 m. For orchard and row-crop work below canopy level, the 3WZD-200 has a minimum ground clearance of 150 mm and the 380C provides 200 mm for uneven terrain.

Turning. Turning radius governs headland size and how much time you lose per turn. The 3WPZ-1500C achieves a turning radius of ≤ 3.2 m through four-wheel concentric steering; the 3WZD-200 and 3WYP-50B turn in place via differential and in-situ steering respectively.

6. Step 5 — Decide Who Is in the Machine: Manned, Remote, or Autonomous

Operator exposure is now a primary selection criterion on commercial farms, not an afterthought. The equipment market splits three ways.

Remote-controlled, man-machine separation. The 3WYP-270 unmanned self-propelled boom sprayer and the 3WZD-200 crawler robot both provide a remote control effective distance of up to 500 m. The operator stays out of the chemical cloud entirely, which changes the personal protective equipment burden and the labour pool you can draw on.

Navigation-assisted remote control. The 3WYP-160 is offered as a Beidou Navigation Green Efficient Sprayer with a remote control accuracy of ≤ 2.5 cm — centimetre-level path repeatability, which is what makes overlap and skip control realistic rather than aspirational.

Autonomous navigation. The 2FZH-200 intelligent variable rate spreader uses autonomous navigation driving with man-machine separation, and the 3WYP-270 offers optional autonomous navigation for path planning and autonomous operation.

Power architecture. Where endurance is the constraint, hybrid fuel-electric power is the current answer: the 3WZD-200 and the 2FZH-200 both use a hybrid fuel-electric system with one-button start/stop and long-lasting endurance. The 380C takes the opposite route — a fully electric 48 V DC drive with maximum power of at least 16.4 kW and an endurance of at least 15 hours.

7. Step 6 — Build the Precision Application Layer

This is the layer that determines how much chemical leaves the nozzle versus how much does useful work, and it is where retrofits often deliver better returns than replacing a whole machine. Three components matter.

7.1 The C200 Variable Spray System

The C200 is a pulse-width modulated (PWM) variable spray system for precision agriculture, providing stable pressure pulse spraying with accurate control of application rate.

Its decisive commercial feature is that it can be adapted to existing boom sprayers on the market, which makes it a cost-effective upgrade path rather than a new-machine purchase. It provides individual nozzle control, so each nozzle can be controlled independently — the prerequisite for variable rate spraying, prescription application and target-oriented spraying.

7.2 DJ1215B / DJ2415B Variable Rate Nozzles

Where the spray system is the brain, the nozzle is the actuator. The DJ1215B and DJ2415B are high-performance variable rate nozzles for precision spraying systems, combining a wide flow-adjustment range, fast response and a normally closed solenoid valve.

The normally closed design matters operationally: the nozzle sprays only when the coil is energised, so it prevents dripping and leakage when de-energised — no chemical trail along the headland at every shut-off. The DJ2415B is the configuration with extended flow capacity; model choice follows required flow range, working pressure and control voltage.

7.3 The Four Application Modes

Integration note. Precision control is not always a retrofit. The 3WPZ-1500C is supplied with a variable spray control system providing real-time display of working speed, working pressure, working width, application rate per unit area, worked area and total application amount, and is equipped with variable rate nozzles. On the 3WPZ-3000, the variable spray control system is an optional item to be specified at order.

8. Step 7 — Buy Spray Windows, Not Just a Sprayer

Wind is the constraint that quietly costs commercial farms the most, because a lost spray window cannot be recovered — it can only be replaced by a later, less effective application. Anti-drift air curtain technology attacks this directly.

The anti-drift air curtain uses a cross-flow fan to create an air curtain wall along the spray boom, behind the nozzles. It is available as the FM-12, FM-16 and FM-20 air curtain boom.

The published performance case for the air curtain is unusually concrete, which makes it easier to model:

• Drift reduced by 80% and 30% of pesticide saved.

• Maximum travel speed up to 15 km/h, doubling the efficiency of conventional boom sprayers.

• Operation under external wind conditions below Level 4, providing more spraying time windows.

• 50% water saved compared with conventional boom sprayers, through secondary atomisation that refines droplet size and improves penetration and coverage — so efficacy is maintained at low water volumes.

• Independent section control, with each boom section able to control air curtain on/off or air speed independently, plus an adjustable air curtain angle to suit natural wind conditions and blow open the crop canopy.

Against airbag-type air curtain booms, the cross-flow design is documented as offering lower energy consumption, higher air velocity, slower air velocity decay, and independent section control.

The wind benefit also appears at machine level: the 3WPZ-3000 is equipped with multiple air curtains, enabling high-speed precision operation even in Level 4 wind with working efficiency up to 100 mu/h.

9. Step 8 — Decide Whether One Machine Should Do Three Jobs

On wheat and rice systems in particular, spraying is not the only pass you make. The 2FZH-200 intelligent variable rate spreader integrates fertilising, seeding and spraying with convenient and quick switching, and uses quantitative spreading per mu — spreading rate automatically adjusts with travel speed.

Its published capability in each mode:

It is positioned for early uniform sowing and base fertilising of wheat and rice, as well as later topdressing and spraying. With three-wheel drive and 2–3 cm narrow wheels, it publishes a wheat-field crop damage rate of 0.28%. If your operation runs separate passes for seed, base fertiliser and chemical, a combined machine changes the arithmetic on both labour and compaction.

10. Step 9 — Do Not Overlook the Components Behind the Machine

Autonomy and variable rate application only work if the drivetrain can execute commands precisely and repeatably. The DBSX-3.0 electronic control gearbox is built for unmanned vehicles and provides electronic shifting with fast, accurate gear engagement, high torque and bidirectional output.

Electronic automatic shifting covers forward/reverse gears, high/low speed gears and neutral, and the gearbox realises vehicle travel and braking through electronic control. The transmission ratios are customizable, so a machine can be matched to a specific field speed and torque requirement rather than accepting a fixed compromise.

11. Selection Matrix — Matching Machine to Farm Profile

12. What Drives Payback

Commercial farm equipment decisions are investment decisions, and the published figures give a starting model on three fronts.

Chemical savings. Target-oriented application with high-precision nozzles is documented as saving more than 50%. Air curtain spraying is documented as saving 30% of pesticide through drift reduction of 80%.

Water savings. The air curtain system's secondary atomisation is documented as saving 50% of water versus conventional boom sprayers, while maintaining efficacy at low water volumes.

Productivity. Working efficiency ranges from 40 mu/h (≈ 2.7 ha/h) on 7 m machines, to 100 mu/h (≈ 6.7 ha/h) on the 3WPZ-3000, to ≥ 130 mu/h (≈ ≥ 8.7 ha/h) on the 3WPZ-1500C, up to 200 mu/h (≈ 13.3 ha/h) on the FM-20 air curtain boom. Air curtain operation raises maximum allowable travel speed to 15 km/h, documented as doubling conventional boom sprayer efficiency.

The cost side is not published. Equipment pricing is not part of the manufacturer's technical documentation, so any accurate payback calculation must be built on a quotation from the sales team. Use the published specification sheets to define the configuration, then request pricing for that configuration — not the other way round.

13. Common Selection Mistakes

1. Choosing boom width by budget instead of by block shape. An 18 m boom on a field with frequent obstacles wastes more time in turns than it saves in passes.

2. Ignoring wheel track adjustability. Fixed-track machines force you to accept either crop damage or reduced coverage.

3. Treating drift control as an accessory. A machine that cannot work below Level 4 wind loses days you never get back.

4. Buying a new sprayer when a control-system retrofit would suffice. The C200 variable spray system adapts to most market-available boom sprayers.

5. Skipping the nozzle decision. Nozzle body type, voltage, anti-drip behaviour and flow range determine whether the control system's accuracy actually reaches the droplet.

6. Forgetting the refill loop. Tank capacity is only meaningful relative to your water point access and boom width.

7. Assuming autonomy is a single feature. Remote control with man-machine separation, Beidou-assisted remote control at ≤ 2.5 cm accuracy, and full autonomous navigation are three different capability levels with different operating consequences.

14. Practical Selection Checklist

Work through this before requesting a quotation:

1. Classify each block by scenario: open field, orchard, protected agriculture, medicinal herbs, or other.

2. Measure the blocks — area, row spacing, headlands, water point locations and travel distance to refill.

3. Decide structure — self-propelled, mounted or trailed — based on how many days per season the machine will actually work.

4. Set the minimum working width your season structure requires, then set tank capacity from your refill logistics.

5. Confirm boom height range and ground clearance against the maximum canopy height you spray.

6. Confirm adjustable wheel track and wheel width against your row spacing, and compare published crop damage figures.

7. Choose the control level — remote control, navigation-assisted remote control, or autonomous navigation — based on labour availability and operator exposure policy.

8. Specify the precision layer — variable spray system, variable rate nozzles, and the application modes you need.

9. Decide on drift control and quantify how many additional spray days per season it is worth in your wind climate.

10. Check pressure and voltage compatibility between sprayer, spray system and nozzles before ordering.

11. Confirm final technical parameters with the sales team before system design. Specifications are subject to change without notice.

15. Frequently Asked Questions

What is the working efficiency of a self-propelled sprayer for large fields?
The 3WPZ-1500C self-propelled boom sprayer is rated at ≥ 130 mu/h (≈ ≥ 8.7 ha/h) with a boom of at least 18 m and a total tank capacity of 1500 L (750 L × 2). The 3WPZ-3000 self-propelled sprayer works up to 100 mu/h (≈ 6.7 ha/h) with a 20 m boom and a 3000 L tank.

How much chemical can target-oriented spraying actually save?
Equipment documentation states that target-oriented application with high-precision nozzles can save more than 50%. Separately, the anti-drift air curtain is documented as reducing droplet drift by 80% and saving 30% of pesticide.

Can an air curtain sprayer work in wind?
Yes. The anti-drift air curtain can operate under external wind conditions below Level 4, providing more spraying time windows, and the 3WPZ-3000 equipped with multiple air curtains enables high-speed precision operation even in Level 4 wind.

Can I add precision spraying to a sprayer I already own?
The C200 Variable Spray System is designed to be adapted to existing boom sprayers on the market, offering a flexible and cost-effective upgrade path. It uses individual nozzle control with closed-loop flow control and accuracy of ≥ 95%.

Which machine suits a dense orchard?
The 3WZD-200 crawler-type plant protection robot is designed for orchard plant protection, especially dense orchards. It has a 1420 × 1100 × 720 mm footprint, works slopes up to 30°, turns in place on its crawler chassis, and provides a remote control effective distance of up to 500 m. The Agricultural Unmanned Vehicle 380C is the alternative where wide coverage is the priority, with a spray width of at least 30 m and endurance of 15 hours or more.

What voltage do the variable rate nozzles use?
The DJ1215B and DJ2415B operate on 12 V DC or 24 V DC, with a normally closed solenoid valve, and are available with a stainless steel or ABS body.

Are machines available for greenhouses and livestock buildings?
The 3WYP-50B remote control mini sprayer is intended for greenhouse spraying and fertilisation, as well as disinfection in livestock farms, squares and other areas. It uses in-situ steering and a 50 L tank, with a 2000 mm vertical boom and an optional 3500 mm horizontal boom.

16. About the Equipment Range

The specifications in this guide come from the product documentation of Hefei Duojia Agricultural Technology Co., Ltd.

Established in July 2012 with a registered capital of RMB 10 million, the company is a modern agricultural technology company specialising in the research and development, manufacturing, sales and service of intelligent agricultural machinery. It has a high-level technology talent team known as the "Luzhou Industrial Innovation Team," and has been recognised as a National High-Tech Enterprise, an Anhui Province Specialized and Sophisticated Enterprise, a Hefei Innovative Enterprise, and a Hefei Intellectual Property Demonstration Enterprise.

Its main products include agricultural sprayers, variable-rate nozzles, intelligent spraying control systems, anti-drift air curtain systems, fertilizer spreaders, agricultural transport machinery, multifunctional agricultural machinery and harvesting machinery. Customised products are also provided according to specific customer requirements, helping meet the needs of different agricultural applications and equipment configurations.

Its products and technologies have received a number of industry and technology awards and honours, including:

• First Place in the First National Smart Agriculture Innovation Competition, organised by the Ministry of Agriculture and Rural Affairs

• China Agricultural Machinery Industry Annual Product Innovation Award

• Plant Protection Product Contribution Award

• First Prize in the National Robot Patent Innovation and Entrepreneurship Competition

• China Machinery Industry Science and Technology Award

• Anhui Province Patent Excellence Award

• Anhui Province Science and Technology Progress Award

• Anhui Province Agricultural Science and Technology Promotion Award

The company adheres to the development philosophy of "high starting point, high standards, high technology, and high quality," and is committed to "targeting the world's cutting-edge technologies and creating world-renowned products."

17. Specifying a Custom Configuration

Customisation covers application scenario, machine structure and core components:

• Application scenario — open field crops, orchards, protected agriculture (greenhouses and facilities), Chinese medicinal herbs, and other specialised agricultural environments.

• Machine structure — self-propelled, mounted or trailed.

• Core components — variable spray control systems, variable rate nozzles, intelligent chassis, air curtains, and other spraying system modules, with adjustable parameters.

The process runs in five steps: requirement consultation, solution design, parameter confirmation, production and delivery, and after-sales support.

To get an accurate recommendation, provide your application scenario, preferred machine structure, required core components, crop type and working conditions, and any specific technical requirements.