Variable or covariate

Acronym

Units

Min

Max

Mean

SD

Stand variables

Age

A

yr

2.4

54.8

20.7

7.7

Yield

Y

(m3∙ha1)

0.2

842.5

305.1

155.2

Density

N

trees∙ha1

320

2040

912

379

Climate covariates

Annual mean temperature

Amt

˚C

13.9

20.4

17.5

1.0

Annual mean precipitation

Amp

mm∙yr1

1631

4176

2508

681.2

Temperature to precipitation ratio

TP

100 ˚C∙mm1

0.44

1.09

0.74

0.18

Hottest month’s temperature

Hmt

˚C

18.7

26.0

23.1

1.0

Coolest month’s temperature

Cmt

˚C

9.0

14.0

11.5

1.1

Hottest quarter’s temperature

Hqt

˚C

15.3

21.3

18.0

1.1

Coolest quarter’s temperature

Cqt

˚C

13.5

19.7

16.9

1.1

Moister month’s precipitation

Mmp

mm∙mo1

222

453

312.9

73.1

Driest month’s precipitation

Dmp

mm∙mo1

45

169

72.4

31.8

Moister quarter’s precipitation

Mqp

mm∙Qrt1

568

1328

858.1

225.7

Driest quarter’s precipitation

Dqp

mm∙Qtr1

186

538

271.2

89.7

Topographic covariates

Slope

S

Degree

0

54.9

14.7

6.6

Elevation

E

m.a.s.l.

1693

2693

2216

210

Soil covariates

Level 1

Level 2

pH (4.1 - 5; 5.1 - 6)

pH

Count

462

657

Drainage (W: well; E: excessive)

D

Count

1034

85

Depth (M; moderate; D: deep)

Dp

Count

182

937

Fertility (V: very low; L: low)

F

Count

64

1055