Spatial characteristics of nutrient allocation for Picea crassifolia in soil and plants on the eastern margin of the Qinghai-Tibet Plateau

Table 2 Statistical characteristics of physical characteristics (pH, SBD) of the overall soil layer (0–40 cm) for soil samples in the Qilian Mountains

Parameters	Min	Max	Mean ± SD	Skewness	Kurtosis	CV
pH	6.42	8.19	7.64 ± 0.06	-1.35	2.52	0.03
SBD(g/cm³)	0.08	0.99	0.65 ± 0.02	0.74	-0.07	0.26

the skewness and kurtosis were used to test the normality of the data. skewness = 0, indicating normal distribution, skewness > 0, indicating the right skewness distribution, skewness < 0, indicating a left-skewed distribution; Kurtosis = 3, indicating normal distribution, Kurtosis > 3, indicating fat tails, Kurtosis < 3, indicating thin tails; CV(coefficient of variation) = SD/Mean

ISSN: 1471-2229