Enter current and target soil pH, soil texture and area to estimate the lime (to raise pH) or sulfur (to lower pH) needed.
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Elemental S to lower pH | S rate by texture | Soil fertility texts |
| Lime to raise pH | Lime rate via buffer pH | Adams-Evans 1962 |
| Neutral pH reference | Crop-specific pH ranges | NY/T 391-2021 |
根据土壤当前 pH、目标 pH、质地、调节面积与耕层深度,估算需要施用石灰(CaCO₃ 当量)或硫磺(纯 S)的用量,并给出生石灰、熟石灰的换算参考。