New Zealand Journal of Agricultural Research abstracts
ARGIS: an Agricultural Resource Geographic Information System for
site-specific management of reclaimable saline soils
H. Y. Li
Z. Shi*
J. L. Cheng
Institute of Agricultural Remote Sensing and Information Technology
Application
Zhejiang University
Hangzhou 310029
PR China
*Author for correspondence: shizhou@zju.edu.cn
Abstract In this study, an Agricultural
Resource Geographic
Information System (ARGIS) was developed using oriented-object design
and the Microsoft Visual C++ environment. The primary objective of
ARGIS was to develop a field-implementable program for site-specific
management application in the reclaiming of saline soils. ARGIS
includes four main modules: GIS platform, soil sampling, geostatistics
analysis, and management zones. In practice, EM38 and GPS were used as
data collectors, and soil apparent electrical conductivity (ECa) were
measured and received into the ARGIS program with georeferenced
information first. Then, the geostatistics analysis model was
implemented to describe the spatial variability and to generate the
interpolated map of soil properties of interest. Finally, soil
properties were selected as the input information using fuzzy-c means
unsupervised clustering that assigns field information into potential
management zones. Results show that the spatial variability in soil
properties was well characterised, and the classified management zones
were in favourable agreement with crop yield variability patterns.
Keywords ARGIS; fuzzy-c means clustering;
geostatistics;
management zone; sampling design; VQT
A07096; Online publication date 31 January 2008; Received and
accepted 10 August 2007
New Zealand Journal of Agricultural Research, 2007, Vol. 50:
813–821
0028–8233/07/5005–0813 © The Royal Society of New Zealand 2007
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