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Inputs & Yield

Fertilizer Supply Shock Calculator

Model yield reduction from fertilizer shortages or price-driven under-application. Outputs include production loss, optional value loss, and optional calories lost.

This is a transparent planning model using response-to-nutrient assumptions. Real responses vary by soil, timing, rainfall, and crop genetics.

Inputs Yield Scenario
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Inputs Baseline vs Shock

Enter your fertilizer shock scenario

Start with baseline production and baseline fertilizer application. Then apply a reduction in fertilizer use (from shortages, import disruption, or price spikes) and estimate yield impact using a response curve.

Total output for the crop system being modeled.
Total nutrient product applied (or nutrient-equivalent) over the season.
Used to estimate β€œmissing fertilizer” quantity.
Example: 30% reduction due to shortages or under-application.
Choose how strongly yield responds to fertilizer cuts.
Typical planning range might be 20–60% depending on crop and baseline soil fertility.
Organic inputs, manure, legumes, precision placement, better timing, etc.
Used to estimate cost of the missing fertilizer (same currency).
Used to estimate value of lost production (same currency).
Staple default; adjust for crop type (vegetables are much lower).
Some percentages were out of range and were clamped to valid limits.
Model logic: a fertilizer cut produces a yield loss scaled by the selected response curve and capped by the β€œmax yield loss” setting. Mitigation offsets part of the loss.
Results Yield loss

Fertilizer shock outputs

See the estimated yield reduction, production loss, and optional economic/energy impacts.

Baseline production

β€”

annual

Post-shock production

β€”

annual

Yield loss (%)

β€”

percent

Production loss

β€”

absolute loss

Component Baseline Shock Ξ”
Fertilizer applied β€” β€” β€”
Crop output β€” β€” β€”

Missing fertilizer cost

β€”

if price provided

Value of lost production

β€”

if crop price provided

Calories lost (annual)

β€”

kcal/year (if kcal/kg provided)

Efficiency note

β€”

baseline intensity indicator

Narrative summary
Enter values to see a narrative summary.
Want the next upgrade? We can add N-P-K specific modeling (e.g., N shortage vs K shortage), crop presets, and multi-season recovery (soil nutrient drawdown).