Field trials that actually tell you what works.
Fertilizer rates, irrigation schedules, seed varieties, pest control methods — agriculture runs on decisions made with too little data. Decision Process brings rigorous experimental design to the farm, at any scale.
Experiment Templates
Ready-to-run experiments
Fertilizer Rate Comparison
“Standard nitrogen application achieves near-optimal yield at lower input cost than high-rate application.”
Conditions
- Low N (control)
- Standard N
- High N
Metrics
- Yield per acre (lbs)
- Input cost per acre ($)
- Protein content (%)
Irrigation Scheduling A/B
“Deficit irrigation (80% ET replacement) maintains yield while reducing water use.”
Conditions
- Full ET replacement (control)
- 80% ET replacement
- 60% ET replacement
Metrics
- Yield per acre
- Water use (acre-ft/ac)
- Water use efficiency
Seed Variety Trial
“Hybrid variety B outperforms the incumbent in drought conditions.”
Conditions
- Incumbent variety (control)
- Hybrid A
- Hybrid B
Metrics
- Yield per acre
- Days to maturity
- Standability rating (1–10)
Row Spacing Optimization
“Narrower row spacing increases canopy closure and suppresses weed pressure.”
Conditions
- 30-inch rows (control)
- 20-inch rows
- 15-inch rows
Metrics
- Yield per acre
- Weed density (plants/m²)
- Crop quality rating
Cover Crop Species Comparison
“Legume cover crops build soil nitrogen and reduce fertilizer requirements.”
Conditions
- No cover crop (control)
- Winter rye
- Crimson clover
- Radish mix
Metrics
- Soil nitrate (ppm)
- Subsequent crop yield
- Input cost reduction ($)
Worked Example
Three-rate nitrogen trial across 12 farm plots
A cooperative tests three nitrogen application rates across 12 farm plots over a single growing season. Plots are randomized to Low N, Standard N, or High N (4 plots each). Yield and input cost are recorded at harvest.
Results: yield_per_acre (lbs)
Low N — 80 lbs/ac (control)
mean: 2,840 lbs/acre
95% CI: 2,710–2,970
Standard N — 140 lbs/ac
mean: 3,210 lbs/acre
95% CI: 3,090–3,340
P(better than control) = 97%
High N — 200 lbs/ac
mean: 3,410 lbs/acre
95% CI: 3,280–3,540
P(better than control) = 99%
Standard N achieves 94% of High N yield at 62% of the input cost per acre. At 97% posterior probability, Standard N significantly outperforms Low N. The marginal return of High N does not justify the additional $38/acre input cost — Standard N is the economically optimal rate.
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