Research Article
Soil Quality and Pomelo Productivity as Affected by Chicken Manure and Cow Dung
Table 6
Principal component matrix in the topsoil layer (0–20 cm).
| Principal components | PC1 | PC2 | PC3 |
| pHH2O (1 : 2.5) | 0.096 | 0.902 | 0.018 | EC (mS cm−1) | −0.195 | −0.033 | 0.957 | Soil organic matter (%) | 0.958 | −0.081 | 0.031 | Exchangeable Ca2+ (meq 100g−1) | 0.589 | 0.505 | 0.206 | Exchangeable K+ (meq 100g−1) | 0.508 | −0.585 | 0.071 | Exchangeable Mg2+ (meq 100g−1) | 0.762 | −0.133 | 0.259 | Bulk density (g cm−3) | −0.843 | −0.225 | 0.067 | Total nitrogen (g kg−1) | 0.955 | −0.025 | −0.019 | Available phosphorus (mg kg−1) | 0.929 | −0.021 | −0.111 | Fruit yield (t ha−1) | 0.953 | −0.064 | −0.024 | Total | 5.54 | 1.49 | 1.05 | Percentage of variance | 55.4 | 14.9 | 10.5 | Cumulative percentage variance | 55.5 | 70.4 | 80.6 |
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