Table 4. Correlations (r) among physical and chemical characteristics in mineral growing medium for cultivating eggplants (RW, n = 15).
| pH | Conductivity | Nitrate-N | Ammonium-N | P | K | Ca | Mg | Sulphate | Na | |
|---|---|---|---|---|---|---|---|---|---|---|
| Nitrate-N | 0.915** (1) | |||||||||
| P | 0.933** (3) | 0.894** (2) | 0.984** (2) | −0.954** (1) | ||||||
| K | 0.930** (3) | 0.921** (2) | 0.922** (3) | |||||||
| Ca | 0.894** (1) | 0.897** (2) | 0.951** (2) | −0.941** (1) | 0.998** (1) 0.894** (3) | |||||
| Mg | 0.939** (1) 0.902** (3) | 0.906** (2) | −0.912** (1) | 0.912** (1) 0.958** (3) | 0.907** (3) | 0.925** (1) 0.972** (2) | ||||
| Sulphate | 0.965** (2) | 0.967** (1) | 0.921** (2) | |||||||
| Na | 0.955** (2) | 0.961** (1) | 0.932** (2) | 0.934** (2) 0.887** (3) | 0.955** (2) | 0.996** (1) 0.906** (2) 0.941** (3) | ||||
| Fe | 0.882** (1) | 0.883** (3) | 0.906** (2) | 0.892** (2) | ||||||
| Mn | 0.906** (3) | 0.970** (2) | 0.922** (2) | −0.884** (2) | 0.950** (2) | 0.880** (2) | 0.955** (2) | 0.926** (2) | 0.874** (2) | 0.927** (2) |
| Agrobacterium sp. CFU | 0.891** (2) | −0.945** (1) | ||||||||
| Total CFU | −0.997** (1) | −0.906** (3) | −0.947** (1) | −0.942** (1) |
In parenthesis, the time point when the correlation was observed. ***P < 0.0001, **P < 0.05.