- The Short Answer: What CID-AG Means
- Why "CID-AG" Is Really a Two-Exam Pathway
- Who Issues the Credential and Where You Test
- What the Letters Cover: The 20 Listed Domains
- Sprinkler or Drip/Micro: Choosing Your Specialty
- Fees, Retakes, and Registration Mechanics
- Exam-Day Rules That Affect How You Prepare
- Experience Guidance and Keeping the Credential Active
- Who Values This Credential
- Sequencing Your Preparation Around the Domain Weights
- Frequently Asked Questions
- CID-AG here means Certified Irrigation Designer - Agriculture, the agriculture track of the Irrigation Association's CID credential.
- It is a two-exam pathway: General Agriculture plus either Sprinkler or Drip/Micro, never all three outlines.
- Both exams must be passed within three years of application.
- Initial fees are $250 per exam for members and $495 per exam for nonmembers.
The Short Answer: What CID-AG Means
CID-AG stands for Certified Irrigation Designer - Agriculture. The credential is issued by the Irrigation Association (IA). The official credential name is Certified Irrigation Designer (CID), and the agriculture track is the version aimed at people who design irrigation systems for crop production rather than for turf, landscape, or other settings. On this site, "CID-AG" is shorthand for that agriculture track and nothing else.
That distinction matters because the acronym is not unique across the credentialing world. If you searched the letters and landed on material about a different certification, it will not apply to your preparation. Everything below concerns the Irrigation Association's agriculture design pathway: its structure, its content outlines, its fees, and what a candidate must be able to do on exam day.
If you want a quick companion explanation of the phrasing itself, our pages on what CID-AG stands for and the broader CID-AG meaning cover the vocabulary from a few angles. This article goes further and explains how the name maps to the actual testing structure.
Why "CID-AG" Is Really a Two-Exam Pathway
The most common misunderstanding about this credential is assuming it is one exam. It is not. Earning the agriculture designation means passing two separate examinations:
- General Agriculture: 150 questions with a 4-hour allowance.
- One specialty exam, your choice of:
- Sprinkler: 50 questions, 4 hours (200 questions total with General Agriculture).
- Drip/Micro: 75 questions, 4 hours (225 questions total with General Agriculture).
Both must be passed within three years of application. All questions are multiple choice. Because the time allowances are listed per exam, the eight-hour figure you may see is the aggregate across the two sittings, not a single eight-hour block.
| Pathway | General Agriculture | Specialty Exam | Total Questions |
|---|---|---|---|
| General + Sprinkler | 150 questions, 4 hours | 50 questions, 4 hours | 200 |
| General + Drip/Micro | 150 questions, 4 hours | 75 questions, 4 hours | 225 |
Notice the asymmetry: the Sprinkler specialty has fewer questions than Drip/Micro, yet each is given the same four-hour allowance. That tells you something about the nature of the items. Design-calculation questions consume time, and the Sprinkler exam is built heavily around system type decisions and the calculations that support them. For a deeper look at difficulty, see how hard the CID-AG exam is.
Who Issues the Credential and Where You Test
The Irrigation Association administers the credential. Testing happens at Kryterion testing centers and at selected IA paper-and-pencil administrations. Candidates often ask about taking the exam from home; at-home proctoring has not been verified for this credential, so do not plan around it. Confirm the available format directly with the Irrigation Association when you apply.
Because two exams are required and each carries its own four-hour allowance, scheduling deserves forethought. Our guide to CID-AG exam dates and scheduling walks through how to think about timing, and the three-year window gives you flexibility to take the exams in separate sittings rather than back to back.
What the Letters Cover: The 20 Listed Domains
You will see "20 domains" referenced for this credential. That number can mislead, because it counts three separate outlines end to end, and you will only sit for two of them. Entries 1 through 7 belong to General Agriculture, entries 8 through 16 belong to Drip/Micro, and entries 17 through 20 belong to Sprinkler. You take General Agriculture plus one specialty, not all three outlines as one exam. For a full walkthrough, see our complete guide to all 20 content areas.
General Agriculture (Domains 1-7)
Domain 1: Pumps (15%-20%)
Pump selection and operation for agricultural supply systems.
- Match pump performance to system demand
- Understand how pump output interacts with the piping network
Domain 2: Hydraulics (20%-25%)
The largest General Agriculture area. Expect friction loss, pressure, and flow reasoning applied to field layouts.
- Pipe sizing and pressure management
- Calculations that you must be able to run quickly and accurately
Domain 3: Economics (5%-10%)
Cost considerations in system design decisions.
Domain 4: Soil-Water-Plant Relations (15%-20%)
The agronomic foundation: how soil holds water, how crops use it, and what that means for application decisions.
Domain 5: Scheduling (10%-15%)
Deciding when and how much to irrigate.
Domain 6: Efficiency/Uniformity (10%-15%)
Measuring and improving how evenly and effectively water is applied.
Domain 7: System Components (10%-15%)
The hardware that makes up an agricultural irrigation system.
Drip/Micro Specialty (Domains 8-16)
Domain 8: System Design/Economics (20%-25%)
The heaviest Drip/Micro area, combining layout decisions with their cost implications.
The remaining Drip/Micro entries are Hydraulics (15%-20%), Filtration (15%-20%), Emitting Devices (5%-10%), Injection (5%-10%), Soil-Water-Plant Relations (5%-10%), Scheduling (5%-10%), Efficiency/Uniformity (10%-15%), and Pumps (1%-5%). Filtration and injection are distinctly micro-irrigation topics: small emitter passages demand clean water, and chemigation or fertigation depends on proper injection.
Sprinkler Specialty (Domains 17-20)
Domain 20: Sprinkler Type (40%-50%)
By far the dominant area on the Sprinkler outline. Nearly half the exam centers on understanding sprinkler system types and their appropriate use.
- Know the strengths and limits of each system type
- Be ready to justify a type for a given field condition
The other Sprinkler entries are Pumps and Power (15%-20%), Hydraulics (20%-25%), and Scheduling (10%-15%).
Sprinkler or Drip/Micro: Choosing Your Specialty
Because "CID-AG" resolves into General Agriculture plus one specialty, your first practical decision is which specialty to pursue. Consider these factors:
- Your daily work. A designer who spends most days laying out center-pivot or other sprinkler systems will find the Sprinkler outline closer to lived experience. A designer working in orchards, vineyards, or row crops under micro-irrigation will find Drip/Micro more natural.
- Exam shape. Sprinkler is a 50-question exam dominated by a single 40%-50% domain. Drip/Micro is a 75-question exam spread across nine domains, with Filtration and Hydraulics each reaching 15%-20% and System Design/Economics reaching 20%-25%.
- Breadth vs. concentration. Sprinkler rewards deep command of system types. Drip/Micro rewards broad competence across many smaller topics.
Neither choice is inherently easier; the difficulty is different in kind. If you want help gauging the effort, our CID-AG study guide maps preparation to each outline.
Fees, Retakes, and Registration Mechanics
Fees are charged per exam, and Irrigation Association membership changes the price meaningfully:
| Item | Member | Nonmember |
|---|---|---|
| Initial fee, per exam | $250 | $495 |
| Calculated two-exam total | $500 | $990 |
| Retake, per exam | $200 | $325 |
| Annual renewal | $75 | $125 |
| Additional certification (renewal add-on) | $25 | |
Because the two-exam total is simply double the per-exam fee, the membership difference compounds: the nonmember path costs $490 more than the member path before any retakes. Our CID-AG certification cost breakdown expands on how to budget across initial fees, possible retakes, and renewal.
Exam-Day Rules That Affect How You Prepare
The exams are closed book. Formula material and scratch paper are provided, so you are not expected to memorize every equation, but you are expected to know which formula applies and how to use it under time pressure. Calculators are permitted if they are silent, battery-powered, and nonprinting; programmable models are allowed. A phone, tablet, or watch cannot serve as your calculator.
One rule deserves special attention: breaks do not stop the clock. A bathroom break comes out of your four hours. Practice working through full-length sets without leaving your seat so that pacing becomes automatic.
Key Takeaway
Get fluent with your own calculator before exam day. Since formula material is supplied, the scarce resource is time, and fumbling with an unfamiliar device in a four-hour hydraulics-heavy exam is an avoidable loss.
Passing standard
There is no single universal cutoff. The passing standard is form-dependent and usually falls between 70% and 75%. That means the exact score you need can differ by exam form. For more detail, see our page on the CID-AG passing score, and for what the available evidence says about outcomes, see CID-AG pass rate.
Experience Guidance and Keeping the Credential Active
Recommended background
Experience and education are recommended, not mandatory. The handbook suggests either three years of field experience or two years of experience plus one related year of education. No required prep course, degree, or reference count was identified. This makes the credential accessible, but the exam content assumes real design fluency, so the recommendation is worth taking seriously. Our CID-AG requirements article explains how to assess whether you are ready to apply.
Renewal
The credential is maintained, not permanent. Renewal is annual ($75 member, $125 nonmember, plus $25 for each additional certification), and continuing education is required: 20 CEUs per two years, including at least 10 irrigation-related CEUs and at least 5 Tier 1 / water-efficient CEUs. Plan to log credits steadily rather than scrambling at the end of a cycle.
Who Values This Credential
A designer credential is most useful where design decisions carry financial and agronomic consequences. In practice, that points to:
- Irrigation design and consulting firms serving growers
- Equipment dealers and distributors that design systems as part of a sale
- Agricultural operations with in-house irrigation management
- Water-efficiency and conservation programs that look for demonstrated design competence
Employers value it as evidence that you can size pumps, balance hydraulics, and justify system choices, rather than simply sell hardware. For employment and earnings context, see CID-AG jobs, the CID-AG salary guide, and a frank assessment in whether the CID-AG certification is worth it.
Sequencing Your Preparation Around the Domain Weights
Because General Agriculture is shared by both specialties, it makes sense to start there. The following sequence ties the order to where the points are concentrated:
General Agriculture: Hydraulics and Pumps
- Hydraulics carries 20%-25% and underpins nearly every later topic
- Pair with Pumps (15%-20%) since pump and system curves interact
General Agriculture: Soil-Water-Plant and Scheduling
- Soil-Water-Plant Relations (15%-20%) feeds Scheduling (10%-15%) directly
- Finish with Efficiency/Uniformity, System Components, and Economics
Your Specialty
- Sprinkler: spend the bulk of your time on Sprinkler Type (40%-50%)
- Drip/Micro: prioritize System Design/Economics, Hydraulics, and Filtration
Timed full-length practice
- Work uninterrupted four-hour sets, since breaks do not stop the clock
- Review misses by domain and revisit the heaviest-weighted gaps
When you are ready to test yourself against realistic question styles, use the CID-AG practice tests to find weak domains, and keep the CID-AG cheat sheet handy for quick review of formulas and key facts. You can also revisit the main practice test site for additional question sets as you refine your plan.
Frequently Asked Questions
CID-AG means Certified Irrigation Designer - Agriculture. It is the agriculture track of the Certified Irrigation Designer credential from the Irrigation Association, covering design of irrigation systems for crop production.
It is two exams. You take General Agriculture (150 questions, 4 hours) plus either Sprinkler (50 questions, 4 hours) or Drip/Micro (75 questions, 4 hours). Both must be passed within three years of application.
The 20 entries combine three separate outlines: General Agriculture (1-7), Drip/Micro (8-16), and Sprinkler (17-20). You study General Agriculture plus only one specialty, so you will not be tested on all 20.
Initial fees are $250 per exam for members and $495 per exam for nonmembers, so roughly $500 or $990 for both. Retakes are $200 (member) or $325 (nonmember) per exam.
No. Experience and education are recommended rather than mandatory. The handbook suggests three years in the field, or two years plus one related year of education, but no required course or degree was identified.
For a broader introduction to the credential and its purpose, see what CID-AG is and the overview of CID-AG certification.