Area-to-Point Kriging of Soil Phosphorus Composite Samples

被引:10
作者
Schirrmann, Michael [1 ]
Herbst, Ruprecht [2 ]
Wagner, Peter [3 ]
Gebbers, Robin [1 ]
机构
[1] Leibniz Inst Agr Engn Potsdam Bornim, Potsdam, Germany
[2] Humboldt Univ, D-10099 Berlin, Germany
[3] Univ Halle Wittenberg, Halle, Germany
关键词
Areal interpolation; change of support; geostatistics; soil sampling; spatial prediction; PRECISION AGRICULTURE; MODEL; INTERPOLATION;
D O I
10.1080/00103624.2012.656166
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Mapping of phosphorus (P) is based on sampling and laboratory analysis. Although laboratory analysis is costly, the number of samples is restricted in practice. In zone sampling, areas of the field are used to composite samples from sets of sampling points to reduce efforts. This study introduces area-to-point (ATP) kriging for down-scaling composite samples with different sizes and shapes of the sampling areas. ATP kriging makes use of the coordinates of the sampling points of the composite samples. The applicability was tested on a simulated data set as well as on a spatially dense sample set of P measurements. Validation shows that ATP kriging outperforms point kriging with centroid interpolation. The root mean square error (RMSE) is reduced from 39.5 to 33.5 mg kg(-1). ATP kriging predictions were better at retaining the P value of the sampling area. The smoothing effect of interpolation and the aggregation effect of compositing the samples were reduced.
引用
收藏
页码:1024 / 1041
页数:18
相关论文
共 43 条
[1]   NEW LOOK AT STATISTICAL-MODEL IDENTIFICATION [J].
AKAIKE, H .
IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 1974, AC19 (06) :716-723
[2]  
[Anonymous], 1962, Traite de geostatistique apliquee
[3]  
Boysen P., 2000, GEOREFERENZIERTE BOD
[4]   Precision agriculture demands a new approach to soil and plant sampling and analysis - Examples from Australia [J].
Bramley, RGV ;
Janik, LJ .
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 2005, 36 (1-3) :9-22
[5]  
Chiles J, 1999, GEOSTATISTICS MODELL
[6]   REGULARIZATION OF A SEMI-VARIOGRAM [J].
CLARK, I .
COMPUTERS & GEOSCIENCES, 1977, 3 (02) :341-346
[7]  
Clay DE, 2000, COMMUN SOIL SCI PLAN, V31, P2969
[8]  
Diggle PJ, 2007, SPRINGER SER STAT, P1, DOI 10.1007/978-0-387-48536-2
[9]   Evaluation of soil nutrient variability for development of turfgrass soil test sampling methods [J].
Donohue, SJ .
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 2002, 33 (15-18) :3335-3345
[10]  
Foelzsch M., 2010, GI P 158 PREC AGR RE, P69