What Is CID-AG Certification?

What the Credential Actually Is

Certified Irrigation Designer - Agriculture is the agriculture track of the Irrigation Association's Certified Irrigation Designer (CID) program. The IA is the professional body that sets the standard for irrigation designers, and the credential signals that a person can design agricultural irrigation systems competently: sizing pumps, working through hydraulics, matching water delivery to soil and crop needs, and judging the economics of one design against another.

On this site, "CID-AG" is our routing label for that agriculture track. Be careful when searching the web, because the same letters are used by unrelated credentials in other industries. Everything in this article refers only to the Irrigation Association's irrigation design pathway. If you want a shorter definitional overview, see our pages on what CID-AG is and what CID-AG stands for.

The Two-Exam Pathway Explained

The most important structural fact about this credential is that it is not one unified exam. Candidates complete two exams, and both must be passed within three years of application:

1. General Agriculture: 150 questions, 4 hours.
2. One specialty exam: either Sprinkler (50 questions, 4 hours) or Drip/Micro (75 questions, 4 hours).

Choosing Sprinkler puts you at 200 questions total; choosing Drip/Micro puts you at 225. The eight-hour figure you may see associated with the exam is the aggregate allowance across the two sittings, not a single marathon session.

Your specialty choice should follow your work. A designer who spends most days on center pivots, solid sets, and wheel lines will naturally lean toward Sprinkler. Someone designing orchard, vineyard, or row-crop drip systems will lean toward Drip/Micro. Note the question counts: the Sprinkler exam is shorter, but its blueprint is heavily concentrated, which we cover below.

What the Exams Cover: The 20 Domains

The "20 domains" figure can mislead. It actually enumerates three separate outlines stacked together: entries 1-7 belong to General Agriculture, entries 8-16 to Drip/Micro, and entries 17-20 to Sprinkler. You sit General plus one specialty, so you are never tested on all twenty as a single exam. For a deeper walkthrough, see the complete guide to all 20 content areas.

General Agriculture (Domains 1-7)

Drip/Micro (Domains 8-16)

This outline runs from System Design/Economics (20%-25%, the largest area) through 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 carries unusual weight here because clogging is the defining operational risk of drip and micro systems, so expect questions that connect water quality to filter choice and to injection practices.

Sprinkler (Domains 17-20)

The Sprinkler outline has only four entries, and one of them dominates: Sprinkler Type (40%-50%). The rest is Pumps and Power (15%-20%), Hydraulics (20%-25%), and Scheduling (10%-15%). With a 50-question exam, nearly half the score depends on recognizing sprinkler system types and knowing how each is designed, operated, and matched to field conditions.

Format, Calculators, and Test-Day Rules

All questions are multiple choice. The exams are delivered at Kryterion testing centers and through selected IA paper-and-pencil administrations. At-home proctoring has not been verified for this credential, so plan on a test center rather than assuming you can sit from your kitchen table.

• Closed book: You do not bring references. Formula material and scratch paper are provided.
• Calculators: Silent, battery-powered, nonprinting calculators are permitted, including programmable models. Phone, tablet, and watch calculators are not allowed.
• Breaks: Breaks do not stop the clock, so decide in advance whether you need one.

Because the exams are calculation-heavy, calculator fluency matters. Practice with the exact calculator you will bring, and rehearse the standard hydraulics and scheduling computations until the keystrokes are automatic. Time pressure on a 150-question, four-hour General Agriculture exam is real: it averages well under two minutes per question including unit conversions and multi-step problems.

Passing Standard and Difficulty

There is no single universal cutoff. The passing standard is form-dependent and usually falls between 70% and 75%. Different forms can carry slightly different standards, so avoid fixating on one number; aim to be comfortably above the top of that range on practice work. Our page on the CID-AG passing score goes deeper on how to interpret this.

We do not cite a pass rate here because no verified figure is available to us, and inventing one would do you a disservice. For a qualitative look at the evidence, see what the data shows on pass rates. As for difficulty, the challenge comes less from obscure facts than from the combination of breadth (soils, plants, pumps, hydraulics, economics) and multi-step calculations under time pressure. Our difficulty guide breaks down where candidates tend to struggle.

Eligibility and Experience

Experience and education are recommended, not mandatory. The handbook suggests either three years in the field, or two years in the field plus one year of related education. No required prep course, degree, or reference count has been identified. In practice this means you can attempt the exams without a formal gate, but the recommendation reflects reality: the content assumes you have seen real systems, pumps, and field conditions.

The current linked handbook does not show a verified revision year. A 2010 Drip/Micro sample document circulates, but that date should not be treated as the blueprint date, so rely on the current IA handbook rather than old samples. For the full picture on qualifying, read our requirements guide.

Fees, Retakes, and Renewal

Costs are charged per exam, which is why the two-exam structure matters for budgeting.

Renewing an additional certification adds $25. Because the nonmember premium on the initial fees is substantial, compare it against the cost of IA membership before you apply. A full breakdown lives in our certification cost guide.

Keeping the Credential Active

Certification is not a one-time event. You renew annually and must earn 20 CEUs per two years, including at least 10 irrigation-related CEUs and at least 5 Tier 1/water-efficient CEUs. Plan continuing education as a steady habit rather than a scramble before the cycle closes.

Who Uses This Credential

The credential is relevant to people who design and specify agricultural water systems: irrigation designers and design-build contractors, equipment dealers and distributors who lay out systems for growers, consultants and engineers working on farm water management, and growers or farm managers who want rigorous design knowledge in-house. Employers and clients use it as a recognizable signal of design competence, particularly where water efficiency and system performance matter. We cover the job landscape in CID-AG jobs, earnings in the salary guide, and the value question in is it worth it. We deliberately avoid quoting salary figures here because we have no verified numbers to stand behind.

Sequencing Your Preparation

You do not need an elaborate method, only a sensible order tied to the blueprint. Because hydraulics underpins pumps, sprinklers, and drip design alike, build it first. Soil-water-plant relations and scheduling come next since they explain why a design is sized the way it is. Component recognition and your specialty come last. Here is one example sequence for a General plus Sprinkler candidate; Drip/Micro candidates would swap in filtration and injection.

For a fuller plan, use the CID-AG study guide, keep the one-page cheat sheet handy for quick review, and check exam dates and scheduling before committing to a timeline. When you are ready to test yourself under realistic conditions, run through the practice questions on the main practice test site.

Frequently Asked Questions