Redfield Agronomy GroupSoil & agronomy consulting Book soil testing

Ames, Iowa · soil testing & agronomy

Know what's in the ground before you spend a dollar on it.

Soil sampling, variable-rate prescriptions, nutrient plans, cover crop advising, drone imagery and yield analysis — all built on lab work you can trace back to a field, a depth and a date.

Book soil testing Schedule a farm consult

A white soil sample bag standing upright at the edge of a field

Method

Sampled on a grid. One number you can act on.

A sample is only worth what its paperwork is worth. Every field leaves with a tag: field, depth, date, sampler. The lab reads the same tag we do, and the result comes back attached to it.

Cores are pulled on a grid across the field, bagged and kept cool until they reach the lab. Nothing is mixed across a field line, and nothing is averaged until the results are in.

Freshly pulled soil cores laid out in a row on a steel bench — Cores laid out by depth before they are bagged and tagged.

01 · Surface

0–20 cm

Where the roots are, and where most of the money you spend ends up.

02 · Subsoil

20–60 cm

Shows what has moved down the profile and what has stayed put.

03 · Parent material

60 cm and below

The bottom of the core, and the point where we stop sampling.

Depth intervals are confirmed per field before sampling begins.

Services · six tags

Every service starts as a sample and ends as a decision.

Six ways we work a field, from the first core pulled to the last rate file sent.

Tag 01

Soil sampling

Composite cores pulled across each management zone, one tag per field.

One lab result you can tie to one field and one date.

Tag 02

Variable-rate prescriptions

Lab results joined to your field boundaries and your yield history.

A rate file your applicator can load and follow, acre by acre.

Tag 03

Nutrient management plans

Crop removal, soil supply and your yield goal, reconciled line by line.

Every pound of input has a reason written next to it.

Tag 04

Cover crop advising

Species and seeding window matched to your rotation and your harvest date.

Ground covered through the winter instead of bare until spring.

Tag 05

Drone imagery

Flights over the same field boundaries, read against your soil zones.

Patterns you can see before they turn up in the yield file.

Tag 06

Yield data analysis

Yield files cleaned and joined to soil zones and prescriptions.

You learn which parts of the field pay you back.

Young cereal rye cover crop emerging through corn residue in late autumn — Cover crop advising — species and seeding windows matched to the rotation.

Book soil testing

Send the form. We issue the tag.

Tell us the field and what you're after. We'll agree a sampling window, pull the cores and send everything to the lab under a tag number you can follow.

A tag number and field ID issued for each field.
A sampling window agreed before anyone rolls.
Results returned and filed under the same tag number.

Chain of custody · soil test booking Form 01

Name

Phone

Farm or operation

Field ID or location

Crop in rotation

Service requested

Preferred sampling date

Notes

A tag number is issued once the sampling window is confirmed.

What comes back

Results, imagery and yield files, filed under the same field.

Nothing arrives as a loose number. Every result carries the field, the depth and the date it came from, so the next decision stands on the one before it.

A survey drone hovering low over a green crop field — Imagery flown over the same boundaries the cores came from.

01 · Lab results

Soil test reports

A full nutrient panel with the lab's methods listed, filed under the tag number.

02 · Prescriptions

Rate files

Variable-rate prescriptions your applicator can load straight into the controller.

03 · Yield files

Field analysis

Yield data cleaned and joined to soil zones, so the picture holds across seasons.

Schedule a farm consult

Start with one field.

A consult is a working session on your rotation, your fields and your timing. No lab work needed to get started.

01 · Tell us the field
Field, crop, and what you want to change.

Field name or location, the crop in rotation, and the problem you want solved this season.
02 · Agree a window
Timing set before anything is booked.

We confirm whether it is a call, a field visit or a full sampling round, and when it fits your calendar.
03 · Get the next step
The plan written down.

You leave with the fields, the timing and the service that fits — in writing, before any work begins.

Redfield Agronomy Group

Ames, Iowa · soil testing & agronomy consulting

Services

Soil sampling · Variable-rate prescriptions · Nutrient management plans · Cover crop advising · Drone imagery · Yield data analysis

Book

Soil testing or a farm consult — either form reaches the same desk.