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. 2013 Sep 27;8(9):e75856. doi: 10.1371/journal.pone.0075856

Table 5. Mean surface soil properties (0–20 cm) for land use types (park, n =87; institution, n =131; residential, n =92; roadside, n =95).

Soil properties Land use
ANOVA p
Park Institution Residential Roadside
pH 7.70±0.1b 7.81±0.1b 8.15±0.1a 7.93±0.1ab 0.012
Organic matter, g kg-1 0.65±0.03 0.64±0.03 0.67±0.06 0.69±0.04 NS a
N, mg kg-1 23.57±3.62 25.73±3.14 29.15±6.87 33.13±4.42 NS
P, mg kg-1 43.01±4.58a 33.52±8.35ab 27.17±3.82b 35.33±5.37ab 0.013
K, mg kg-1 117±6.85 112±5.82 117±12.69 131±8.13 NS
Ca, mg kg-1 2407±80b 2394±68b 2634±148ab 2663±96a 0.028
Mg, mg kg-1 255±14 234±11 240±26 224±16 NS
S, mg kg-1 30.87±2.53b 25.03±2.10b 26.04±4.77b 37.23±3.02a 0.001
Fe, mg kg-1 35.11±2.26 32.73±1.86 28.36±4.13 35.12±2.66 NS
Cu, mg kg-1 4.64±0.63ab 3.56±0.57b 4.82±1.27ab 6.21±0.73a 0.003
Mn, mg kg-1 27.04±1.85a 23.93±1.55ab 20.11±3.46b 27.08±2.13ab 0.035
Zn, mg kg-1 5.54±0.66b 6.21±0.55ab 6.47±1.12ab 7.91±0.73a 0.010
B, mg kg-1 0.70±0.07 0.73±0.06 0.68±0.12 0.69±0.86 NS

The results are presented as mean ± SD. In a row, values with the same letters are not significantly different at 5% level based on Duncan’s multiple range tests. a NS, not significant at the α = 0.05 probability level.