N | NH3 | OCa | Sand | Silt | Clay | K | B | Cu | Zn | Fe | P | ECb | pH | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Test | Kjeldahl | Titration | Titration | Hydrometer | Hydrometer | Hydrometer | Flame Photometerf | Azomethine He | Atomic | Atomic | Atomicd | Olsenc | Conductometer | pH meter |
Normal | 0.2< | – | 1.5< | 40–50 | 30–40 | 20–30 | 250 | 2 | 2 | 3 | 12 | 15 | 2> | 6.5–7.5 |
Sample | 0.04 | 0.01 | 5.4 | 88 | 6 | 6 | 108.4 | 1.84 | 1.16 | 12.09 | 7.24 | 20 | 4.83 | 6.85 |