optimize-input-economics

name	optimize-input-economics
description	Set input rates at the economic optimum where marginal return equals marginal cost, not at agronomic maximum, so the last unit pays. Reach for this on any input decision.

Skill: Optimize input economics

The last bushel often costs more than it returns.

Step 1 — Build the response curve

Yield response to the input from data/trials (§3 #1).

Step 2 — Find the economic optimum

Where marginal return = marginal cost at current prices.

Step 3 — Vary by zone

Apply the optimum by management zone, not field-flat (§3 #2).

Step 4 — Quantify the ROI

State the return vs an over/under-applied baseline.

Output

An economic-optimum rate by zone with the input ROI.