°C |
||||
|
24.0 | 200 | ||
|
18.7 | 0 | ||
|
17.5 | 28 | ||
|
17.2 | 8 |
0-10 | Saturated soil |
11-30 | Soil is adequately wet (except coarse sands which are drying out at this range). |
31-60 | Usual range to water (except heavy clay soils). Water at the upper end of this range in cool humid climates and with higher water-holding capacity. |
61-100 | Usual range to irrigate heavy clay soils. |
101-200 | Soil is becoming dangerously dry for maximum production. |