Soil test interpretation:
The soil testing laboratories classify the results of soil tests as low, medium and high. These standards generally followed in most of the states.
S |
Item |
Low |
Medium |
High |
1 |
Organic carbon used as a measure of available nitrogen. |
Below 0.5 p.c. | 0.5 to 0.75 p.c. |
Above 0.75 p.c. |
| 2 | Available N by alkaline permanganate method inkg/ha |
Below 280 | 280 - 560 | Above 560 |
| 3 | Available P by
Olsen’s method in kg/ha |
Below 10 | 10 - 24.6 | Above 24.6 |
| 4 | Available K in kg/ha | Below 108 | 108 - 280 | Above 280 |
| 5 | pH | Acidic | Normal | Alkaline above |
| Below 6.0 | 6.0 to 8.0 | 8.0 (9.0 harmful for most crops) |
||
| 6 | Conductivity (total soluble salts) millimhos |
|||
| Below-1 | Normal | |||
| 1-2 | Soluble salt content critical for germination. | |||
| 2-3 | Salt content
critical for the growth of salt sensitive crops |
|||
| Above 3 | Severe injury to most crops. | |||
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