- What This Credential Actually Is
- The Two-Exam Pathway Explained
- General Agriculture: Seven Domains
- Choosing Drip/Micro or Sprinkler
- Registration, Fees and Retakes
- Exam-Day Rules and Calculator Policy
- Experience and Eligibility
- Sequencing Your Prep Around the Weights
- Keeping the Credential Active
- Who Values This Credential
- Frequently Asked Questions
- CID-AG here means the Irrigation Association's Certified Irrigation Designer, agriculture track, earned through two separate exams.
- Every candidate takes General Agriculture (150 questions) plus either Sprinkler (50) or Drip/Micro (75).
- Both exams must be passed within three years of application; initial fees total $500 member or $990 nonmember.
- Sprinkler Type carries 40%-50% of the sprinkler exam, the heaviest single weighting in the pathway.
What This Credential Actually Is
The Certified Irrigation Designer - Agriculture credential is issued by the Irrigation Association (IA). Its official credential name is CID with an agriculture track, and "CID-AG" is simply the shorthand used on this site. It certifies that a designer can plan agricultural irrigation systems that are hydraulically sound, economically defensible and water-efficient.
The acronym appears elsewhere in the professional world, so a quick identity check is worthwhile. Everything in this article refers only to the IA's agricultural irrigation design credential. If you want a plain-language orientation first, the explainer What Is CID-AG Certification? covers the basics, and What Does CID-AG Stand For? clears up the naming.
The key structural fact is that this is a pathway, not a single test. You earn the credential by passing two exams: a broad General Agriculture exam and one specialty exam matched to the type of system you design. That structure shapes everything else, from budgeting to study sequencing.
The Two-Exam Pathway Explained
Candidates take General Agriculture plus exactly one specialty. You do not sit all three outlines. The published content outlines enumerate 20 domain entries, but they belong to three separate documents: entries 1-7 for General Agriculture, entries 8-16 for Drip/Micro, and entries 17-20 for Sprinkler. Reading "20 domains" as a single exam is a common misunderstanding, and it inflates how daunting the credential looks. For a fuller walkthrough, see CID-AG Exam Domains 2026: Complete Guide to All 20 Content Areas.
| Pathway | General Agriculture | Specialty Exam | Total Questions |
|---|---|---|---|
| General + Sprinkler | 150 questions, 4 hours | Sprinkler: 50 questions, 4 hours | 200 |
| General + Drip/Micro | 150 questions, 4 hours | Drip/Micro: 75 questions, 4 hours | 225 |
All questions are multiple choice. The time allowance is four hours per exam, which the IA describes as an aggregate of eight hours across the two sittings. Breaks do not pause the clock, so pacing matters even though the allowance is generous.
Passing standards are form-dependent, usually falling between 70% and 75%, rather than one fixed universal cutoff. For the nuance, read CID-AG Passing Score 2026: Exactly What You Need to Pass.
General Agriculture: Seven Domains
The General Agriculture exam is the larger of the two at 150 questions, and it covers the foundations that apply regardless of emitter or sprinkler choice. The weights are published as ranges.
| Domain | Weight |
|---|---|
| Pumps | 15%-20% |
| Hydraulics | 20%-25% |
| Economics | 5%-10% |
| Soil-Water-Plant Relations | 15%-20% |
| Scheduling | 10%-15% |
| Efficiency/Uniformity | 10%-15% |
| System Components | 10%-15% |
Hydraulics (20%-25%)
The single largest General Agriculture domain. Expect calculation-driven questions where you must work through a pipe network or pump scenario rather than recall a definition.
- Friction loss in mainlines and laterals, and how pipe size and flow interact
- Elevation effects and pressure requirements at the point of use
- Pressure and flow relationships across a multi-segment system
Pumps (15%-20%)
Pump selection and operation tie directly to hydraulics, so the two domains reinforce each other.
- Reading and applying pump performance relationships
- Matching pump capability to system demand
- Power and energy considerations that feed into operating cost
Soil-Water-Plant Relations (15%-20%)
This domain connects design to agronomy. A designer who cannot reason about how water moves through soil and is used by crops cannot size a system correctly.
- Water holding characteristics of soils and how they affect application decisions
- Crop water use and how it drives system capacity
- The link between root zone conditions and irrigation timing
Scheduling, Efficiency/Uniformity and System Components each carry 10%-15%, and Economics rounds out the outline at 5%-10%. Economics is the lightest domain, but it often appears as applied cost comparison, so do not skip it entirely. The strategy detail lives in CID-AG Study Guide 2026: How to Pass on Your First Attempt.
Choosing Drip/Micro or Sprinkler
Your specialty choice should follow your actual design work. Candidates who design mostly center-pivot, solid-set or other sprinkler systems will naturally pick Sprinkler, while those working in orchards, vineyards, row crops with drip tape or similar will lean Drip/Micro. The two outlines differ sharply in shape.
Drip/Micro (75 questions)
| Domain | Weight |
|---|---|
| System Design/Economics | 20%-25% |
| Hydraulics | 15%-20% |
| Filtration | 15%-20% |
| Efficiency/Uniformity | 10%-15% |
| Emitting Devices | 5%-10% |
| Injection | 5%-10% |
| Soil-Water-Plant Relations | 5%-10% |
| Scheduling | 5%-10% |
| Pumps | 1%-5% |
Notice how Filtration is a major domain here. Drip emitters clog easily, so filtration design and water quality reasoning carry real weight, along with chemical injection. These topics barely register on the Sprinkler side. Drip/Micro also has the most domains of any outline, so breadth of preparation matters.
Sprinkler (50 questions)
| Domain | Weight |
|---|---|
| Sprinkler Type | 40%-50% |
| Hydraulics | 20%-25% |
| Pumps and Power | 15%-20% |
| Scheduling | 10%-15% |
The Sprinkler exam is shorter in question count but dense in focus. The Drip/Micro exam is longer and broader. Neither is automatically easier, and our How Hard Is the CID-AG Exam? Complete Difficulty Guide 2026 explores how candidates tend to experience the difference.
Registration, Fees and Retakes
Fees are charged per exam, and IA membership lowers them substantially.
| Fee Item | IA Member | Nonmember |
|---|---|---|
| Initial fee, per exam | $250 | $495 |
| Two-exam total (calculated) | $500 | $990 |
| Retake, per exam | $200 | $325 |
| Annual renewal | $75 | $125 |
Because the nonmember premium on two exams is $490, it is worth comparing that gap against the cost of IA membership before you apply. The renewal fee also differs by membership status, so the savings continue after certification. Additional certifications add $25 to renewal. A complete cost walkthrough is in CID-AG Certification Cost 2026: Complete Pricing Breakdown.
Exams are delivered at Kryterion testing centers and at selected IA paper-and-pencil administrations. At-home proctoring has not been verified, so plan on traveling to a testing site. For scheduling details, see CID-AG Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Exam-Day Rules and Calculator Policy
These exams are closed book. You receive provided formula material and scratch paper, which is important because the hydraulics-heavy content depends on formulas you should practice using in that supplied form rather than from memory alone.
- Permitted calculators: silent, battery-powered, nonprinting models. Programmable calculators are allowed.
- Not permitted as calculators: phones, tablets and watches.
- Clock: breaks do not stop the timer.
Key Takeaway
Bring a calculator you already know cold. Since programmable models are allowed but device-based calculators are not, practice every hydraulics and pump calculation on the exact handheld you will carry into the testing room, and rehearse working from a formula sheet rather than recalling equations unaided.
Experience and Eligibility
Experience and education are recommended, not mandatory. The handbook suggests three years in the field, or two years in the field plus one related educational year. No required prep course, degree or reference count has been identified, so the recommendation functions as guidance rather than a gate. That said, the calculation-heavy, applied nature of the questions means candidates without field exposure to pumps, pipe networks and crop water use will have a steeper climb.
Review CID-AG Requirements 2026: Eligibility, Prerequisites & How to Qualify before applying, and confirm current handbook language with the IA directly. The linked handbook does not show a verified revision year, so rely on the IA for the latest blueprint rather than on older sample material you may find circulating.
Sequencing Your Prep Around the Weights
The overlap between outlines should drive your schedule. Hydraulics appears in all three outlines (20%-25% in General, 15%-20% in Drip/Micro, 20%-25% in Sprinkler), and pumps appear in all three as well. Building hydraulic fluency first pays off twice. Here is one way to sequence an eight-week plan around your chosen specialty.
Hydraulics and Pumps
- Work friction loss, elevation and pressure problems by hand with your exam calculator
- Connect pump performance to system demand, since both domains feed every outline
Soil-Water-Plant, Scheduling, Efficiency
- Cover the agronomy foundations that drive capacity and timing decisions
- Study efficiency and uniformity, which appear in General and Drip/Micro
Specialty Deep Dive
- Sprinkler candidates: master Sprinkler Type thoroughly, given its 40%-50% weight
- Drip/Micro candidates: prioritize System Design/Economics, Filtration and Hydraulics
Components, Economics and Timed Practice
- Close gaps in System Components and Economics
- Run timed sets that mimic the 150-question General format
Because the three-year window applies to both exams, you can also split preparation: take General Agriculture first, then focus entirely on your specialty. Test your readiness along the way with the practice questions on the main practice test site, and keep the CID-AG Cheat Sheet 2026: One-Page Review of Must-Know Facts handy for last-minute review.
Keeping the Credential Active
Certification is not permanent. Renewal runs on a two-year continuing education cycle requiring 20 CEUs. Within those, you need at least 10 irrigation-related CEUs and at least 5 Tier 1 / water-efficient CEUs. Annual renewal fees apply ($75 member, $125 nonmember), plus $25 for each additional certification you hold.
The water-efficiency emphasis is worth noting. It reflects the same priorities tested on the exam, where efficiency, uniformity and scheduling appear in every outline. Treat continuing education as an extension of the exam's themes rather than a separate chore.
Who Values This Credential
The credential serves people whose work involves designing or specifying agricultural irrigation: irrigation designers and system engineers, dealers and distributors who specify equipment for growers, consultants who audit and improve water use, and farm operations that design in-house. Specific employer lists and earnings vary by region and role, so approach any salary claim cautiously. For a measured look, see CID-AG Jobs, CID-AG Salary Guide 2026: Complete Earnings Analysis and Is the CID-AG Certification Worth It? Complete ROI Analysis 2026.
Frequently Asked Questions
Two. You pass General Agriculture (150 questions, 4 hours) plus either Sprinkler (50 questions) or Drip/Micro (75 questions), each with a four-hour allowance. Both must be passed within three years of application.
Initial fees are $250 per exam for IA members and $495 for nonmembers, so a two-exam total of $500 or $990. Retakes cost $200 member and $325 nonmember per exam.
No. Phones, tablets and watches are not allowed as calculators. Silent, battery-powered, nonprinting calculators are permitted, and programmable models are acceptable. The exam is closed book with provided formula material and scratch paper.
Experience and education are recommended, not mandatory. The handbook suggests three years in the field, or two years plus one related educational year. No required prep course or degree was identified.
It is form-dependent, usually between 70% and 75%, rather than one fixed cutoff. See our CID-AG pass rate analysis for what is and is not publicly known, and use the practice test site to measure your readiness.