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Liquid Fertilizers
3-18-18 Pro Max
Orthophosphate Starter + 1% Sulfur + Pro Availability + Max Uptake
The flagship: both technology packages in one jug.
Order 3-18-18 Pro Max
Delivered pricing · –
View cart (0) →Tanker loads are call-to-order: (833) 247-4832
Sized from your soil test
Does your soil actually need 3-18-18 Pro Max?
Upload your soil test and we'll read every value on it. If your soil calls for 3-18-18 Pro Max, you get the exact gallons and delivered price. If a different product would earn more first, we'll say that instead.
No soil test yet? We'll mail you the kit, free reading included.
Buy a soil test · $30Or key your numbers in on the calculator. The read is free either way.
Pick your crop, enter acres, and drop the report. We'll tell you straight whether 3-18-18 Pro Max is where your first fertility dollar should go.
Reading your soil test…
Multi-page reports can take up to a minute.
Or call (833) 247-4832 and read it to an agronomist.
✓ Your soil calls for 3-18-18 Pro Max
Rate
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You'll need
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We'd ship you
Delivered total
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freight included east of the Rockies · – / ac
Straight answer: not 3-18-18 Pro Max first
Based on this test, 3-18-18 Pro Max isn't where we'd spend your first fertility dollar. Your soil calls for – ahead of it.
When our products don't fit your soil, we say so. The advice is free and the program is built on your numbers, not ours.
More than 3-18-18-1
The + is Pro Availability + Max Uptake.
Both technologies on one starter over the -1 sulfur: rhizosphere nutrient cycling support around the root, and improved dissolved-state persistence for nutrient acquisition.
What it is
Orthophosphate Starter + 1% Sulfur + Pro Availability + Max Uptake
The 3-18-18 orthophosphate P-K starter with 1% sulfur (the '-1') carrying both technologies: Pro Availability for the root zone and Max Uptake for nutrient delivery, on one fertility foundation.
What it returns
Returns on investment per container.
Pick the size that fits your acres. Every tier is delivered: freight already in the number, no surprises at the dock. The return is what the 3-18-18 pro max unlocks on your fields, not what's on the invoice.
| Container | Delivered total | Shipping |
|---|---|---|
| 5 gal jug | $210 | freight included |
| 55 gal drum | $910 | freight included |
| 275 gal tote | $3,230 | freight included |
| 3850 gal tanker | Call to order | (833) 247-4832 |
Freight is already in every delivered total.
Flexible financing
Order this. Pay over time.
PayPal Pay Later
Split your order into four interest-free payments right at checkout, or monthly payments on bigger orders. Approval takes seconds, no paperwork.
John Deere Financial
Put a full-season program on your John Deere Financial account. Apply online in minutes, or ask us how.
Apply with John Deere Financial →AgQuest
Finance your inputs through AgQuest and pay when the crop does. Apply online, or ask us how to get set up.
Apply with AgQuest →*Terms apply. Financing options appear at checkout, terms set by the provider. The agronomy advice is always free.
The research
The evidence behind 3-18-18 Pro Max, ours and everyone else's.
Every figure carries its source. Independent research shows where the agronomy holds up; our own replicated trials show it on the ground.
AgriTec trials
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The full AgriTec wheat program yielded 98.8 bu/ac versus 78.6 on the untreated check, a +25.7% lift on a replicated trial (6 treatments × 4 reps, 24 plots) with identical starting soil (pH 5.4).
Agricenter International trial · Memphis, TN
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Replicated on-farm trial partnerships across the Southeast: peanut (Auburn University), soybean (Alcorn State University), and forage (Tuskegee University).
AgriTec university trial partners
Independent research
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Banded starter phosphorus raised corn yield +5.2% on average across 474 U.S. comparisons, strongest below critical soil-test P, fading on high-P soils.
Quinn, Lee & Poffenbarger 2020: Field Crops Research 254
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Banded 10-34-0 added +5–7 bu/ac corn on low-to-medium-P soils across 8 site-years.
NDSU A1851 (Endres, rev. 2022)
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Corn responded to sulfur in about half of trials (the S-deficient, low-OM and sandy fields), averaging ~+11 bu/ac on responsive sites.
Purdue (26 of 55 trials) + Iowa State (47 sites)
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Ammonium sulfate recovered ≥10–17% herbicide control in hard water by tying up antagonistic cations.
Devkota & Johnson 2016: Weed Technology
Independent findings are general to the nutrient or mechanism and describe where a response is likely, not a guarantee on your field. Match them to your soil test; an AgriTec agronomist will help.
Documents
Label & SDS for 3-18-18 Pro Max.
Always read and follow the label before use. Questions? Call (833) 247-4832.
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Ready to put this on your acres?
Built on your soil test. Sized to your acres.
Talk to an AgriTec agronomist or build a free recommendation in under a minute.