Table 2 Pearson correlation coefficients between soil nutrient contents and physical properties
SOC | TN | TP | TK | \({\text{N}\text{H}}_{4}^{+}\)-N | \({\text{N}\text{O}}_{3}^{-}\)-N | AP | AK | Soil bulk density | Soil capacity | Total porosity | |
|---|---|---|---|---|---|---|---|---|---|---|---|
TN | 0.98** | ||||||||||
TP | 0.34 | 0.45 | |||||||||
TK | –0.50 | –0.44 | –0.24 | ||||||||
\({\text{N}\text{H}}_{4}^{+}\)-N | 0.81** | 0.81** | 0.18 | –0.24 | |||||||
\({\text{N}\text{O}}_{3}^{-}\)-N | 0.72* | 0.73* | 0.28 | –0.20 | 0.95** | ||||||
AP | 0.92** | 0.88** | 0.17 | –0.28 | 0.87** | 0.81** | |||||
AK | 0.79* | 0.83** | 0.30 | 0.03 | 0.91** | 0.88** | 0.88** | ||||
Soil bulk density | –0.88** | –0.91** | –0.31 | 0.47 | –0.82** | –0.69* | –0.71* | –0.73* | |||
Soil capacity | 0.95** | 0.96** | 0.27 | –0.46 | 0.84** | 0.73* | 0.82** | 0.78* | –0.97** | ||
Total porosity | 0.80** | 0.87** | 0.29 | –0.25 | 0.69* | 0.55 | 0.61 | 0.70* | –0.95** | 0.92** | |
Capillary porosity | 0.85** | 0.84** | 0.11 | –0.20 | 0.95** | 0.90** | 0.91** | 0.91** | –0.79* | 0.87** | 0.71* |