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      A Mixed Application of Geographically Weighted Regression and Unsupervised Classification for Analyzing Latex Yield Variability in Yunnan, China

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          Abstract

          This paper introduces a mixed method approach for analyzing the determinants of natural latex yields and the associated spatial variations and identifying the most suitable regions for producing latex. Geographically Weighted Regressions (GWR) and Iterative Self-Organizing Data Analysis Technique (ISODATA) are jointly applied to the georeferenced data points collected from the rubber plantations in Xishuangbanna (in Yunnan province, south China) and other remotely-sensed spatial data. According to the GWR models, Age of rubber tree, Percent of clay in soil, Elevation, Solar radiation, Population, Distance from road, Distance from stream, Precipitation, and Mean temperature turn out statistically significant, indicating that these are the major determinants shaping latex yields at the prefecture level. However, the signs and magnitudes of the parameter estimates at the aggregate level are different from those at the lower spatial level, and the differences are due to diverse reasons. The ISODATA classifies the landscape into three categories: high, medium, and low potential yields. The map reveals that Mengla County has the majority of land with high potential yield, while Jinghong City and Menghai County show lower potential yield. In short, the mixed method can offer a means of providing greater insights in the prediction of agricultural production.

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          Hemispheric and large-scale land-surface air temperature variations: An extensive revision and an update to 2010

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            A climatic stratification of the environment of Europe

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                Author and article information

                Journal
                101664454
                44155
                Forests
                Forests
                Forests
                1999-4907
                20 May 2017
                11 May 2017
                2017
                02 February 2018
                : 8
                : 5
                : 162
                Affiliations
                [1 ]Geography Doctoral Program, University of Southern California, Los Angeles, CA 90089, USA
                [2 ]Department of Economics, University of Southern California, Los Angeles, CA 90089, USA
                [3 ]Kunming Institute of Botany, Chinese Academy of Sciences & World Agroforestry Centre (ICRAF) East and Central Asia, Kunming 650201, China
                [4 ]School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI 48109, USA
                [5 ]Department of Geography, Kent State University, Kent, OH 44242, USA
                Author notes
                [* ]Correspondence: oskim@ 123456kei.re.kr ; Tel.: +82-44-415-7792
                [†]

                Current address: Korea Environment Institute, Sejong 30147, Korea.

                Article
                NIHMS876914
                10.3390/f8050162
                5796418
                5debc857-69d5-4f67-8014-6f398aba2ddc

                This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

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                Article

                agricultural yield,mixed method,geographically weighted regression,iterative self-organizing data analysis technique,rubber plantation,xishuangbanna,mekong region

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