# Bear Flag autonomous tractor retrofit at Salinas: deployment

Canonical ID: `6d7a5945-2795-4bcd-ac1a-31d667f0283a`

Church Brothers LLC (Church Brothers Farms), one of the largest produce growers in the US and based in the Salinas Valley, deployed Bear Flag Robotics autonomous tractor retrofit systems for tillage and ground preparation on their California fields starting in 2020. Church Brothers VP of Agriculture Josh Ruiz noted that the autonomous system outperformed human operators for precision: 'the work the computer is doing is actually better than what my people can do.' Bear Flag operated five 370-horsepower tractors during the 2020 season across approximately a dozen customers, charging roughly $20/acre for custom autonomous tillage. Church Brothers was the anchor enterprise customer, tilling parts of their fields almost every day of the year and providing a high-density data collection environment. California regulations required an on-site handler monitoring each robot during field operations at the time. Bear Flag Robotics was acquired by John Deere for $250M in August 2021; its autonomous tractor technology was folded into John Deere's commercial autonomous 8R program.

## Key facts

- **Operator:** Church Brothers LLC (Church Brothers Farms), Salinas Valley CA
- **Deployment start:** 2020 (testing from 2019)
- **End:** August 2021 (Bear Flag acquired by John Deere)
- **Task:** Autonomous tillage and ground preparation
- **Crops:** Lettuce and other high-value vegetables
- **Service model:** Autonomous Tillage-as-a-Service, ~$20/acre
- **Fleet size:** 5 tractors (2020 season across ~12 customers)
- **Base tractor:** John Deere 8RT 370 hp with Bear Flag retrofit kit

**Trust tier:** Catalog entry · 4 sources · not yet field-verified

_Last updated: 2026-06-12_

- **Slug:** bear-flag-church-brothers-salinas
- **Status:** ended
- **Model:** [Bear Flag autonomous tractor retrofit](/models/bear-flag-autonomous-tractor.md) (id: `08bcaf47-3702-4e9c-9d48-0b638d56e8c2`)
- **Company:** [Bear Flag Robotics](/companies/bear-flag-robotics.md) (id: `c6deed28-76f1-4b41-9ddb-a20b9b5b1629`)
- **Location:** [Salinas](/locations/salinas-ca.md) (id: `0d03ba47-14bf-47ba-a103-b4ebed318796`)
- **First seen:** 2020-01-01T00:00:00.000Z

## Verification log (0, append-only)

_No verifications recorded._

## Sources (4)

1. **Custom Autonomous Tillage and Kits to Retrofit Tractors Drive Company** · https://www.dtnpf.com/agriculture/web/ag/equipment/article/2021/02/16/custom-autonomous-tillage-kits-drive · 2021-02-16
2. **AgFunder exit review: John Deere's $250M acquisition of Bear Flag Robotics** · https://agfundernews.com/agfunder-exit-review-why-john-deere-acquired-bear-flag-robotics-for-250m · 2021-08-05
3. **Autonomous tractors at work for Church Brothers Farms** · https://www.futurefarming.com/tech-in-focus/autonomous-tractors-at-work-for-church-brothers-farms/ · 2021-01-01
4. **Driverless tractor tech takes on Salinas** · https://www.producebluebook.com/2021/03/05/driverless-tractor-tech-takes-on-salinas/ · 2021-03-05

## Common questions

### What is the Bear Flag autonomous tractor retrofit deployment at Salinas?

Bear Flag autonomous tractor retrofit, built by Bear Flag Robotics, is recorded as a deployment at Salinas on the DEPLOY registry. Bear Flag Robotics operates the deployment directly.

### Who operates Bear Flag autonomous tractor retrofit at Salinas?

Bear Flag Robotics, the manufacturer of Bear Flag autonomous tractor retrofit, operates this deployment directly. This is a maker-deploys-its-own-product arrangement rather than a customer pilot.

### When did the Bear Flag autonomous tractor retrofit deployment at Salinas go live?

The deployment is recorded as starting January 1, 2020 on the DEPLOY registry. Earlier activity may exist but is not yet sourced.

### Is the Bear Flag autonomous tractor retrofit deployment at Salinas still active?

As of the most recent verification on the DEPLOY registry, this deployment is no longer operating at this location.

### Have there been incidents at the Bear Flag autonomous tractor retrofit deployment at Salinas?

No active incidents affecting this deployment are recorded on the DEPLOY registry. Absence of recorded incidents is not a guarantee no incident occurred; DEPLOY records only sourced incidents and suppresses retracted ones.


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