---
title: Surface chart
styles: [scientific]
---

```chart
type: surface
title: Yield peaks at moderate water and 80 kg of nitrogen
subtitle: Crop yield by water and nitrogen, illustrative figures
data:
  inline:
    - {water: 100, nitrogen: 0, yield: 2.2}
    - {water: 100, nitrogen: 20, yield: 2.5}
    - {water: 100, nitrogen: 40, yield: 2.8}
    - {water: 100, nitrogen: 60, yield: 3.1}
    - {water: 100, nitrogen: 80, yield: 3.3}
    - {water: 100, nitrogen: 100, yield: 3.1}
    - {water: 100, nitrogen: 120, yield: 2.8}
    - {water: 150, nitrogen: 0, yield: 2.5}
    - {water: 150, nitrogen: 20, yield: 3.1}
    - {water: 150, nitrogen: 40, yield: 3.9}
    - {water: 150, nitrogen: 60, yield: 4.7}
    - {water: 150, nitrogen: 80, yield: 5.0}
    - {water: 150, nitrogen: 100, yield: 4.7}
    - {water: 150, nitrogen: 120, yield: 3.9}
    - {water: 200, nitrogen: 0, yield: 2.9}
    - {water: 200, nitrogen: 20, yield: 3.9}
    - {water: 200, nitrogen: 40, yield: 5.2}
    - {water: 200, nitrogen: 60, yield: 6.5}
    - {water: 200, nitrogen: 80, yield: 7.0}
    - {water: 200, nitrogen: 100, yield: 6.5}
    - {water: 200, nitrogen: 120, yield: 5.2}
    - {water: 250, nitrogen: 0, yield: 3.0}
    - {water: 250, nitrogen: 20, yield: 4.2}
    - {water: 250, nitrogen: 40, yield: 5.8}
    - {water: 250, nitrogen: 60, yield: 7.4}
    - {water: 250, nitrogen: 80, yield: 8.0}
    - {water: 250, nitrogen: 100, yield: 7.4}
    - {water: 250, nitrogen: 120, yield: 5.8}
    - {water: 300, nitrogen: 0, yield: 2.9}
    - {water: 300, nitrogen: 20, yield: 3.9}
    - {water: 300, nitrogen: 40, yield: 5.2}
    - {water: 300, nitrogen: 60, yield: 6.5}
    - {water: 300, nitrogen: 80, yield: 7.0}
    - {water: 300, nitrogen: 100, yield: 6.5}
    - {water: 300, nitrogen: 120, yield: 5.2}
    - {water: 350, nitrogen: 0, yield: 2.5}
    - {water: 350, nitrogen: 20, yield: 3.1}
    - {water: 350, nitrogen: 40, yield: 3.9}
    - {water: 350, nitrogen: 60, yield: 4.7}
    - {water: 350, nitrogen: 80, yield: 5.0}
    - {water: 350, nitrogen: 100, yield: 4.7}
    - {water: 350, nitrogen: 120, yield: 3.9}
    - {water: 400, nitrogen: 0, yield: 2.2}
    - {water: 400, nitrogen: 20, yield: 2.5}
    - {water: 400, nitrogen: 40, yield: 2.8}
    - {water: 400, nitrogen: 60, yield: 3.1}
    - {water: 400, nitrogen: 80, yield: 3.3}
    - {water: 400, nitrogen: 100, yield: 3.1}
    - {water: 400, nitrogen: 120, yield: 2.8}
encoding: {x: water, y: nitrogen, z: yield}
axes:
  x: {label: Water (mm)}
  y: {label: Nitrogen (kg/ha)}
  color: {label: Yield (t/ha)}
```