By Sagar Shankaran, Founder of CallSphere
A 180-field seed and fertility plan takes 120 hours one field at a time and misses the December discount. What changes when four agents build it side by side.
Key takeaways
One hundred eighty fields. Forty minutes each, honestly counted: pull three years of yield off the combine data, open the fall soil test for that field, look at the drainage and the soil types, decide the hybrid and the trait package, set the population by productivity zone, work out phosphorus and potash off crop removal, check whether the pH needs lime, pick the nitrogen rate, then write it all down where somebody can order from it. One hundred twenty hours. Three full weeks of eight-hour days, done by one certified crop adviser who has thirty other customers and who is also trying to get his own soil sampling finished before the ground freezes.
The soil tests do not come back from the lab until late October or into November. The seed early-order discount closes in the first week of December on most dealers' programs, the second tier in mid-January. Fall anhydrous goes on when the ground hits fifty degrees and stays there, which some years is a two-week window. So the honest calendar is six weeks with three deadlines cutting across it, and the plan for field 87 does not get built until field 86 is done, because there is one person and one screen.
That is the whole problem, and it is worth naming precisely: this job is not slow because it is hard. It is slow because it is serial.
The agronomist works down a list. Operations Center or Climate FieldView on one monitor, the lab's soil test PDF on the other, a seed guide in a third window, and a spreadsheet where the plan accumulates. He does the biggest farms first, because those are the ones the owner asks about. By field 120 he is tired and the rest get the default: same hybrid as last year, same population, removal-based P and K, done.
Meanwhile the seed dealer needs an order, and the owner needs a total, because the operating loan request depends on what the crop plan costs. So what actually happens on a lot of farms is that half the acres get a real plan and half get booked on last year's numbers with a promise to sharpen them up in February. The sharpening sometimes happens. The re-order at a worse price always does.
The roles do not change: the owner decides what to spend, the CCA decides what goes where and signs the recommendation, the planter operator has to load the file into the display in April, and the seed dealer needs the order in a form his system takes. Nobody in that chain is redundant. They are just waiting on each other.
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Claude Opus 4.6 arrived with a million-word working memory, which on its own means you can hand over the entire soil test file and three years of yield data in one go instead of feeding it a field at a time. The bigger change came with it: Agent Teams, released as a research preview, where several agents split one large job, work at the same time, and merge the results at the end.
For a list of 180 fields, that is the whole story. Four agents each take forty-five fields, or better, four agents each take a different part of every field's plan and run down the list together. The work does not get faster per field. The calendar stops being a line.
flowchart TD
A["180 fields, fall soil tests and three years of yield maps loaded"] --> B["Job split four ways"]
B --> C["Phosphorus, potash and lime from removal and soil test"]
B --> D["Hybrid and seeding population by yield zone"]
B --> E["Herbicide program checked against the trait package"]
B --> F["Whole order priced against the dealer quotes on file"]
C --> G["Merged plan, field by field, with a cost per acre"]
D --> G
E --> G
F --> G
G --> H["CCA reviews, signs, order goes in before December 5"]
You give it the field list with acres and the FSA tract and field numbers, the soil test file straight from Ward or AgSource or Midwest Labs, the last three years of harvest data, the rotation, and the dealer quote sheets you already have sitting in email. Then one goal: build the 2027 seed and fertility plan for every field and price it.
The fertility agent works removal-based rates off the actual yields, flags every field where pH is under the threshold you set and puts lime tons against it. The seed agent places hybrids and populations against the productivity zones in the yield data and against your rotation, and it does not put a short-season number on your best-drained ground because it can see three years of what that ground did. The chemistry agent reads the trait package on each hybrid it just placed and checks the burndown and residual program against it — the check that gets missed at eleven at night and costs you a replant conversation in June. The pricing agent runs the whole order against the quotes you have from the co-op, from Nutrien, from your independent dealer, normalized to dollars per acre instead of per unit or per ton.
Four hours later there is one workbook: 180 rows, each with hybrid, population, P, K, lime, nitrogen rate, herbicide program and cost per acre, plus a summary of tons and units by supplier and a list of the twenty-two fields where something needs a human decision. The CCA now spends his time on twenty-two fields and a review pass, not on 180 first drafts.
An illustration, with the assumptions stated so you can swap yours in. Suppose 3,200 acres, a total seed, fertilizer and chemistry booking of $1,020,000 for the 2027 crop. Suppose your dealer's program pays 4% on anything booked and paid by December 5 and 2% by January 15. Suppose that in each of the last two years, roughly half the acres got booked in the second tier because the plan was not finished. And suppose the CCA bills $95 an hour, or that his time is worth that to you if he is on your payroll.
| Assumption | Serial, one field at a time | Split four ways |
| Planning hours | 120 | 26 hours of review |
| Planning cost at $95/hr | $11,400 | $2,470 |
| Acres booked in the 4% tier | 1,600 | 3,200 |
| Discount on $1,020,000 | $30,600 | $40,800 |
| Fields that got a real plan | about 120 | 180 |
| First-year difference | $19,130, before anything the better placement does in the fall | |
Notice what is not in that table: yield. Nobody can promise you bushels from a planning change, and anyone who does is selling something. The money above sits in the discount tier and in hours, and you can count it before the planter ever rolls.
The recommendation is his name on paper, and in several states a nutrient management plan tied to a manure agreement or a conservation contract has to be written by a licensed or certified person. That does not change because four agents did the first draft faster. What changes is what he is reviewing.
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Then there is everything a soil test cannot see. Compaction from the year you mudded a field out. The forty acres you know are coming out of the lease if the landlord's son comes home. The field where the previous operator ran a herbicide with a long rotation restriction and never told anybody. Field history is stored in people, and on a lot of farms in one person who is sixty-four years old. Get it out of him and into the file.
And the prescription files that go to the planter display still need a human to load and verify. A wrong population file that nobody caught costs you a pass across the field in April, which is the one thing on this farm that money genuinely cannot buy back.
Pick one farm, ideally a rented one with six or eight fields and a landlord who asks questions. When the soil tests come back, hand the whole thing over at once and let it build those eight plans while you are still combining. Then go through them line by line with your CCA. You are not testing the agronomy; you are finding out which of your own records are too thin to plan from. Most operations find the soil test is fine, the yield data is fine, and the field boundaries are three years out of date.
It replaces the first draft, not the adviser. What your CCA is worth was never typing removal rates into a spreadsheet at ten at night. It is knowing the north eighty floods, that you have a resistance problem on the river ground, and that your landlord will not pay for lime. Give him back the three weeks and he will spend some of it walking your fields.
Those build a rate map once you have decided what you want. This is the deciding part, across every field at once, with the seed order, the chemistry check and the price comparison done in the same pass. The two work together; the map still gets written in the program that talks to your planter.
It works from whatever seed guide and dealer sheets you give it. It does not know a brand-new number that is not in any document you own, and it does not have secret trial data. If you want a hybrid considered, put the sheet in the folder.
They surface it rather than average it. In practice the disagreement you see most is the chemistry check flagging a hybrid the seed side just placed. That is exactly the conflict you want raised in November instead of found in June.
A short note from us. Planning season and phone season are the same season. From late October through the December booking deadline your line rings with dealers, the lab, landlords and the insurance agent, usually while you are in a cab. CallSphere builds AI voice and chat agents that pick up the farm line day or night, take the details, and book the callback on your calendar.
Written by
Sagar Shankaran· Founder, CallSphere
LinkedInSagar Shankaran is the founder of CallSphere, where he builds production AI voice and chat agents deployed across healthcare, hospitality, real estate, and home services. He writes about agentic AI, LLM engineering, and shipping voice agents that handle real calls in production.
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