| soil nutrient test item |
|||
| Test item | detection Limit | detection range | Measurement error |
| ammonium nitrogen | 2ppm | 0~50 ppm | 10% |
| nitrate nitrogen | 2ppm | 0~75ppm | |
| rapid available phosphorus |
2ppm | 0~60 | |
| rapidly available potassium |
20ppm | 0~750ppm | |
| rapidly available potassium |
0.2% | 0~4% | |
| Fertilizer test item |
|||
| Test item | detection Limit | detection range | Measurement error |
| ammonium nitrogen | 0.5% | (0~25)% | 10% |
| nitrate nitrogen | 0.5% | (0~20)% | |
| urea nitrogen |
1% | (0~50)% | |
| available phosphorus |
1.5% | (0~60)% | |
| potassium |
2% | (0~50)% | |
| chloride ion | 0.2% | (0~10)% | |