# Clone the repo
git clone https://github.com/your-org/dbt-fertilizer-app.git
cd dbt-fertilizer-app
Gloves, rain, mud, and glare. The best DBT fertilizer apps feature:
Ready to build your own?
Your crops (and your profit margin) will thank you. dbt fertilizer app high quality
Have you built an agronomic model in dbt? I’d love to hear how you handled spatial data or variable rate prescriptions. Find me on LinkedIn or the dbt Slack (#industry-agtech).
Liked this post? Subscribe to our newsletter for more analytics engineering in agriculture, energy, and climate tech. # Clone the repo
git clone https://github
| App Message | Meaning | Your Action |
|-------------|---------|--------------|
| "N ratio exceeds 150 kg/ha for rainfed rice" | Risk of lodging (crop falling over) | Reduce by 20% or split into 3 doses |
| "P fixation risk: soil pH >7.8 & low organic carbon" | Phosphorus will become unavailable | Use coated P or apply in bands, not broadcast |
| "K/Mg imbalance detected" | Excess K blocks Mg uptake | Apply 20 kg MgSO₄/ha separately |
A wrong fertilizer rate can burn a crop—or waste thousands of dollars. We enforce data quality tests in schema.yml: Your crops (and your profit margin) will thank you
version: 2
models:
- name: fct_fertilizer_rate
columns:
- name: n_rec_lb_ac
tests:
- not_null
- dbt_utils.accepted_range:
min_value: 0
max_value: 300 # Sanity check
- custom_fertilizer_change_test # Macro: rate not jumping >50% vs last year
- name: p2o5_rec_lb_ac
tests:
- not_null
- at_least_25 # Custom test: never recommend less than 25 lb P2O5
We also run singular tests:
-- test_no_negative_rates.sql
SELECT * FROM ref('fct_fertilizer_rate')
WHERE n_rec_lb_ac < 0 OR p2o5_rec_lb_ac < 0 OR k2o_rec_lb_ac < 0
pip install -r requirements.txt
18:31:22 10 of 12 START test unique_fertilizer_batch_id .......... [PASS]
18:31:22 11 of 12 START test not_null_field_geo_zone ............ [PASS]
18:31:22 12 of 12 START test custom_application_rate_bounds ..... [PASS]
Consider a 1,000-acre corn operation. Using a basic app, the farmer applies a flat rate of 180 lbs/N per acre. Switching to a high-quality DBT fertilizer app utilizing zonal management changed the game:
Net result: Total fertilizer spend dropped 12%, while average yield increased 8 bushels/acre. The app paid for itself in the first 40 acres.