Table 1 Number of different types of sampling plots, vegetation types, number of samples, and soil property data.
From: Terraced fields increased soil organic carbon content in croplands of the loess plateau
Land types | Planting method | Vegetation types | Number of soil profiles | Soil depth(cm) | Soil texture fractions | Soil moisture(%) | SOC(g•kg− 1) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Clay(%) | Silt (%) | Sand(%) | Mean | SD | Mean | SD | |||||
Terrace | Single vegetation | Wheat | 9 | 0-100 | 11.1 | 80.9 | 8.0 | 24.2 | 10.36 | 7.7 | 2.78 |
Apple trees | 9 | 0-100 | – | – | – | 24.3 | 9.32 | 7.1 | 2.39 | ||
Potatoes | 9 | 0-100 | – | – | – | 26.8 | 12.98 | 5.2 | 2.32 | ||
Legumes | 9 | 0-100 | – | – | – | 23.2 | 15.21 | 4.5 | 2.10 | ||
Maize | 9 | 0-100 | – | – | – | 21.4 | 10.35 | 7.7 | 2.48 | ||
Robinia pseudoacacia L. | 4 | 0-100 | 10.8 | 79.4 | 9.8 | 18.2 | 5.92 | 8.0 | 2.77 | ||
Pinus tabuliformis Carr. | 4 | 0-100 | 9.9 | 84.0 | 6.1 | 19.3 | 6.33 | 9.8 | 4.44 | ||
Medicago sativa L. | 4 | 0-100 | 10.9 | 80.0 | 9.1 | 20.4 | 13.62 | 5.6 | 1.57 | ||
Vegetable | 9 | 0-100 | – | – | – | 22.1 | 5.31 | 6.5 | 1.80 | ||
Multiple vegetation | Apple tree- legumes | 3 | 0-100 | – | – | – | 20.2 | 7.36 | 5.4 | 1.65 | |
Apple tree- potatoes | 3 | 0-100 | – | – | – | 22.7 | 10.68 | 6.7 | 1.77 | ||
Sloping land | Single vegetation | Wheat | 4 | 0-100 | 10.0 | 78.0 | 12.0 | 21.3 | 13.44 | 4.9 | 1.07 |
Grassland | 3 | 0-100 | 10.4 | 80.1 | 9.5 | 21.0 | 9.62 | 6.0 | 2.26 | ||
Abandoned terraces | Multiple vegetation | Apple trees and weeds | 5 | 0-100 | 10.6 | 78.5 | 10.8 | 23.7 | 11.35 | 6.4 | 1.85 |
