Read yield and soil by management zone and apply variable-rate inputs where they pay, instead of a field average. Reach for this on a yield or input question.
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---
name: manage-by-zone
description: "Read yield and soil by management zone and apply variable-rate inputs where they pay, instead of a field average. Reach for this on a yield or input question."
---
# Skill: Manage by zone
A field average hides the productive and the problem zones.
## Step 1 — Delineate zones
Build management zones from yield, soil, and topography (§3 #2).
## Step 2 — Read yield by zone
Compare zone yields, not the field mean.
## Step 3 — Vary the inputs
Put inputs where they return; pull them where they don't.
## Step 4 — Measure the lift
Track per-zone return vs uniform application.
## Output
Delineated zones, a per-zone yield read, a variable-rate plan, and the return lift.
