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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

  Evergreen Mixed
Max Min Mean SD N Max Min Mean SD N
MAP (mm) 1749 950.0 1366 305.0 6 2542 73 1159.76 509.24 21
MAT (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