Journal article

Analysis of the anisotropic spatial variability and three-dimensional computer simulation of agricultural soil bulk density in an alluvial plain of north China

Y He, KL Hu, YF Huang, BG Li, DL Chen

Mathematical and Computer Modelling | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2010

Abstract

Statistical analysis of the heterogeneity of soil bulk density in regional scale is important to crop growth and tillage management. While most field data focus on bulk density up to a depth of 0.3 m, this study measured the bulk density of 28 in situ soil core locations up to a depth of 1.3 m. Geostatistical method was used to analyze the anisotropic spatial variability and three-dimensional Sequential Gaussian Simulation (SGSIM) was conducted. The results of nugget/sill ratio indicated that the sampling scheme was fine enough to capture the spatial correlation distance of bulk density in the vertical direction. The nugget effect, however, in the horizontal direction suggested that the samp..

View full abstract

University of Melbourne Researchers

Grants

Awarded by National High-Tech Research and Development Program of China


Awarded by National Key Basic Research Special Funds


Awarded by Program for New Century Excellent Talents in University


Awarded by Australian Centre for International Agricultural Research


Funding Acknowledgements

The study was funded by the National High-Tech Research and Development Program of China (2007AA10Z217), the National Key Basic Research Special Funds (2009CB118607), Program for New Century Excellent Talents in University (NCET-07-0809), and the Australian Centre for International Agricultural Research project (LWR/2003/039).