Project: Effects of soil-borne resources on the structure and
dynamics of lowland tropical forests
Principal Investigators:
James Dalling
Kyle Harms
Joseph Yavitt
Robert Stallard
Dept. of Plant Biology,
505 S Goodwin Ave.
University of Illinois,
Urbana, IL 61801, USA
dallingj@life.uiuc.edu
Dept. of Biological Sciences,
Louisiana State University,
202 Life Sciences Bldg.,
Baton Rouge, LA 70803, USA
kharms@lsu.edu
Dept. of Natural Resources,
16 Fernow Hall,
Cornell University,
Ithaca, NY 14853, USA
jby1@cornell.edu
U.S. Geological Survey-WRD,
3215 Marine Street, Boulder, CO
80303, USA
stallard@colorado.edu
Post-doctoral Associate:
Robert John-Chandran
Dept. of Plant Biology,
505 S Goodwin Ave.
University of Illinois,
Urbana, IL 61801, USA
robertjc@life.uiuc.edu
For more information about
these data please contact
Jim Dalling
dallingj@life.uiuc.edu
Acknowledgements
Please acknowledge the following agencies that
provided funding for the collection and analyses of
these data
NSF DEB021104,021115, 0212284,0212818 and
OISE 0314581
STRI Soils Initiative and CTFS
Thanks to Paolo Segre and Juan Di Trani for
assistance in the field
Table 1. Variogram model fit parameters for soil properties for the BCI 50-ha plot. The measured data values
were first transformed using Box-Cox transformation, and then a polynomial trend surface regression was fitted.
The residuals from the trend surface regression were used to compute empirical variograms, to which variogram
models were fitted. Lambda is the Box-Cox parameter, and trend order indicates the order of the polynomial
regression. Effective range for the Exponential variogram model is estimated at 3 times the fitted range because
the variogram approaches the sill only asymptotically.
Soil variable
Al
B
Ca
Cu
Fe
K
Mg
Mn
P
Zn
N
Nmin
pH
Lambda
1.0
0.5
0.5
1.0
0.5
0.0
0.5
0.5
0.5
0.5
0.0
0.5
1.0
Trend order
2
2
2
2
2
2
2
2
2
2
2
1
2
Model
Exponential
Exponential
Exponential
Exponential
Exponential
Exponential
Exponential
Exponential
Exponential
Exponential
Spherical
Spherical
Exponential
Nugget
10801.7
0.04053
21.29
0.9552
2.95
0.0875
5.73
2.846
0.4556
0.00662
0.0754
6.23
0.0172
Partial sill
68415.3
0.3649
425.6
4.54
15.83
0.2193
64.27
133.5
1.471
2.135
0.0986
2.192
0.1403
Effective
range (m)
155.0
100.0
56.5
179.1
146.6
78.5
85.2
212.8
204.5
33.3
239.5
141.1
220.7
Maps: Filled-contour maps plotted using block average data.
pH
Maps: Filled-contour maps plotted using block average data.
Aluminum (Al): mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Boron (B): mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Calcium (Ca): mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Copper (Cu): mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Iron (Fe): mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Potassium (K): mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Magnesium (Mg): mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Manganese (Mn): mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Nitrogen (N): mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Nitrogen mineralisation: mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Phosphorus (P): mg / kg of oven-dried soil
Maps: Filled-contour maps plotted using block average data.
Zinc (Zn): mg / kg of oven-dried soil