Table 5.
Coefficient of correlation between available soil nutrients, enzyme activity and plant nutrient uptake.
| SoilAv.N | SoilAv.P | SoilAv.K | Plant N uptake | Plant P uptake | Plant K uptake | SMBC | DHA | PHA | Yield | |
|---|---|---|---|---|---|---|---|---|---|---|
| Soil Av.N | 1 | |||||||||
| SoilAv.P | 1.00 | 1 | ||||||||
| SoilAv.K | 0.99 | 0.99 | 1 | |||||||
| Plant N uptake | 0.99 | 0.98 | 0.98 | 1 | ||||||
| Plant P uptake | 0.99 | 0.98 | 0.97 | 0.99 | 1 | |||||
| Plant K uptake | 0.99 | 0.98 | 0.98 | 1.00 | 1.00 | 1 | ||||
| SMBC | 0.98 | 0.98 | 0.96 | 0.97 | 0.98 | 0.97 | 1 | |||
| DHA | 0.97 | 0.98 | 0.95 | 0.96 | 0.98 | 0.96 | 0.99 | 1 | ||
| PHA | 0.98 | 0.98 | 0.97 | 0.97 | 0.98 | 0.98 | 0.97 | 0.99 | 1 | |
| Yield | 0.95 | 0.95 | 0.92 | 0.93 | 0.94 | 0.93 | 0.97 | 0.98 | 0.96 | 1 |
DHA = Dehydrogenase activity, SMBC = Soil microbial biomass carbon, PHA = Phosphatase activity.