What Is A CID-AG?

What the CID-AG Credential Actually Is

CID-AG stands for Certified Irrigation Designer - Agriculture. It is issued through the Irrigation Association (IA) and is the agriculture track of the broader Certified Irrigation Designer (CID) credential. It is meant for people who design irrigation systems for crop production: choosing pumps, sizing pipe, laying out sprinkler or drip/micro systems, and scheduling water against what soil and plants actually need.

If you have seen the same letters attached to other credentials in unrelated fields, set those aside. Everything on this page concerns the irrigation design credential only. For other angles on the name, see our short explainers on what CID-AG stands for and the meaning of CID-AG.

What distinguishes this credential from a general agronomy or farm-management certificate is its engineering flavor. Candidates are expected to work through hydraulic calculations, interpret pump behavior, and make design decisions that balance performance against cost. The exams test applied design reasoning, not vocabulary recall.

The Two-Exam Pathway: General Agriculture Plus One Specialty

The most common misunderstanding about CID-AG is treating it as a single test. It is a pathway built from two exams, and you choose your second exam based on the kind of system you design.

Both exams must be passed within three years of your application. The eight-hour figure you may see associated with the exam is the aggregate allowance across the two sittings, not a single eight-hour session. Each sitting carries its own four-hour limit.

What the Exams Cover: The Domain Outlines

The official content list enumerates 20 domains, but they are not one 20-part exam. They are 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 will be tested on General plus one specialty outline. For a deeper walk through each area, read our complete guide to all 20 content areas.

General Agriculture (Domains 1-7)

General Hydraulics is the single largest block at 20%-25%, followed closely by Pumps and Soil-Water-Plant Relations at 15%-20% each. Since this exam is 150 questions, those three areas together account for a large share of your result. Expect calculation-driven items: friction loss, pressure requirements, pump operating points, and how soil water-holding characteristics translate into irrigation depth and timing.

Drip/Micro (Domains 8-16)

The Drip/Micro outline rewards candidates who understand why small-orifice systems fail: clogging, pressure variation across a block, and poor filtration choices. Filtration and Hydraulics together carry substantial weight, and System Design/Economics at 20%-25% is the top category. Injection (chemigation and fertigation hardware) is a smaller but distinctive area that candidates from sprinkler backgrounds often under-prepare.

Sprinkler (Domains 17-20)

The Sprinkler outline is lopsided on purpose. Sprinkler Type at 40%-50% means nearly half the questions probe the characteristics, selection, and limitations of different sprinkler system types. A candidate who is comfortable with hydraulics but vague about the differences between system types is exposed here.

Question Style, Format, and Exam-Day Rules

All questions are multiple choice. In practice that means scenario-based design problems in which you read a set of field conditions, perform the calculation or reasoning, and select the best answer. The exam is closed book, but formula material and scratch paper are provided.

Calculators and Timing

• Permitted: silent, battery-powered, nonprinting calculators, including programmable models.
• Not permitted: calculator functions on a phone, tablet, or watch.
• Breaks do not stop the clock, so plan your four-hour block with that in mind.

Where You Test

Exams are delivered through Kryterion testing centers and selected IA paper-and-pencil administrations. Whether at-home online proctoring is available has not been verified, so confirm current delivery options directly with the IA when you register. Our exam dates and scheduling guide covers how to approach timing.

The Passing Standard

There is no single fixed universal cutoff. The passing standard is form-dependent and usually falls in the 70%-75% range. Treat 75% as your practical target on practice material so you are not caught short if your form sits at the high end. We unpack this further in our passing score article, and you can read what is and is not known publicly in the pass rate analysis.

Fees, Registration, and Retakes

Because you take two exams, costs are calculated per exam and then doubled for the full pathway.

Notice what the retake structure implies: if you pass General Agriculture and miss only the specialty exam, you retake only the one you missed, not both. That makes it strategic to avoid rushing the second exam. The full cost picture, including membership considerations, is broken out in our certification cost guide.

Experience Recommendations 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 year of related education. No required prep course, degree, or reference count has been identified. In other words, you are not formally blocked from sitting the exams without that background, but the exam content assumes you have worked through real design problems.

The current linked handbook does not show a verified revision year, and the 2010 Drip/Micro sample document should not be read as the blueprint date. Always work from the most recent handbook available from the IA rather than from older sample material. Our requirements article lists what to check before applying.

Who Uses This Credential and Where It Fits

The CID-AG is relevant wherever agricultural irrigation systems are designed, specified, sold, or evaluated. Typical settings include:

• Irrigation dealers and design-build firms that lay out pivot, solid-set, or drip systems for growers.
• Equipment manufacturers and distributors whose technical staff specify systems for customers.
• Engineering and consulting practices serving farms, orchards, and vineyards.
• Large agricultural operations with in-house irrigation managers or designers.
• Water-efficiency programs and agencies that evaluate system design.

We do not publish earnings figures here because we have no verified data to cite. For a discussion of how employers value the credential, see the jobs overview and the ROI analysis.

Keeping the Credential Active

Certification is not permanent. Renewal is annual, at $75 for members and $125 for nonmembers, plus $25 for each additional certification you hold. You must also accumulate 20 CEUs per two-year period, including a minimum of 10 irrigation-related CEUs and 5 Tier 1/water-efficient CEUs.

The Tier 1/water-efficient requirement signals what the IA values: designs that conserve water. It is worth planning your continuing education around that category early instead of scrambling near the end of the cycle.

Sequencing Your Preparation Around the Weighting

Rather than generic scheduling advice, let the official weights set your order. Hydraulics appears in all three outlines at or near the top weight, so it is the foundation. Pumps and Soil-Water-Plant Relations come next in General Agriculture. Only then should you branch into your specialty. A fuller method is in our study guide, and the cheat sheet is useful for last-pass review.

When you are ready to test yourself under realistic conditions, use the full set of questions on the CID-AG practice test site, and revisit weak domains afterward.

Frequently Asked Questions