Table 4 Mean and standard deviation for the mean annual precipitation (MAP), mean annual temperature (MAT), sand, silt, clay, age, altitude, and pH in evergreen and mixed tree stands
From: Influence of trees and associated variables on soil organic carbon: a review
| Â | Evergreen | Mixed | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Max | Min | Mean | SD | N | Max | Min | Mean | SD | N | |
MAPÂ (mm) | 1749 | 950.0 | 1366 | 305.0 | 6 | 2542 | 73 | 1159.76 | 509.24 | 21 |
MATÂ (oC) | 27.00 | 19.0 | 19.65 | 0.77 | 5 | 25.00 | 7.4 | 15.57 | 5.38 | 22 |
Sand (%) | 92.44 | 37.29 | 74.53 | 20.51 | 5 | 71.40 | 2.6 | 32.09 | 18.38 | 14 |
Silt (%) | 43.55 | 1.87 | 12.62 | 12.84 | 5 | 86.20 | 8.0 | 46.08 | 17.40 | 14 |
Clay (%) | 25.69 | 5.69 | 12.44 | 7.98 | 5 | 58.30 | 5.78 | 24.31 | 14.48 | 15 |
Age (yrs.) | 600.00 | 6.0 | 161.75 | 219.12 | 4 | 400.0 | 20.0 | 81.87 | 113.42 | 7 |
Altitude (m asl) | 410 | 100 | 255 | 155 | 2 | 2650 | 157.0 | 931.18 | 519.66 | 22 |
pH | 7.15 | 4.08 | 5.11 | 0.77 | 12 | 6.58 | 3.3 | 5.21 | 0.93 | 17 |