NUGGET EFFECT INFLUENCE ON SPATIAL VARIABILITY OF AGRICULTURAL DATA
ABSTRACT Spatial variability description of soil chemical properties by thematic maps depends substantially on suitable geostatistical models. One of the parameters composing a geostatistical model is nugget effect. This study aimed to evaluate the simultaneous influence of nugget effect and samplin...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Engenharia Agrícola
2020-02-01
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| Series: | Engenharia Agrícola |
| Subjects: | |
| Online Access: | http://www.scielo.br/pdf/eagri/v40n1/1809-4430-eagri-40-01-0096.pdf |
| _version_ | 1798026288859971584 |
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| author | Luciana P. C. Guedes Raquel T. Bach Miguel A. Uribe-Opazo |
| author_facet | Luciana P. C. Guedes Raquel T. Bach Miguel A. Uribe-Opazo |
| author_sort | Luciana P. C. Guedes |
| collection | DOAJ |
| description | ABSTRACT Spatial variability description of soil chemical properties by thematic maps depends substantially on suitable geostatistical models. One of the parameters composing a geostatistical model is nugget effect. This study aimed to evaluate the simultaneous influence of nugget effect and sampling design on geostatistical model estimation and estimation of soil chemical properties at unsampled sites, considering simulated data. Our results will be used as scientific basis for spatial variability analyses of soil chemical properties in agricultural areas. Given the simulation results and agricultural data, we concluded that the high nugget effect values obtained here reduced spatial estimation efficiency. Moreover, a systematic sampling design promoted the least accurate estimates of geostatistical model and at non-sampled sites. Despite that, these nugget effect estimates should be kept in the analysis. However, further studies will be needed to investigate which factors are responsible for such high nugget effect values. |
| first_indexed | 2024-04-11T18:32:54Z |
| format | Article |
| id | doaj.art-337ed8fbf4ac4888b8c32e2dfd17dda8 |
| institution | Directory Open Access Journal |
| issn | 0100-6916 |
| language | English |
| last_indexed | 2024-04-11T18:32:54Z |
| publishDate | 2020-02-01 |
| publisher | Sociedade Brasileira de Engenharia Agrícola |
| record_format | Article |
| series | Engenharia Agrícola |
| spelling | doaj.art-337ed8fbf4ac4888b8c32e2dfd17dda82022-12-22T04:09:22ZengSociedade Brasileira de Engenharia AgrícolaEngenharia Agrícola0100-69162020-02-014019610410.1590/1809-4430-eng.agric.v40n1p96-104/2020NUGGET EFFECT INFLUENCE ON SPATIAL VARIABILITY OF AGRICULTURAL DATALuciana P. C. Guedeshttps://orcid.org/0000-0001-6631-2478Raquel T. BachMiguel A. Uribe-OpazoABSTRACT Spatial variability description of soil chemical properties by thematic maps depends substantially on suitable geostatistical models. One of the parameters composing a geostatistical model is nugget effect. This study aimed to evaluate the simultaneous influence of nugget effect and sampling design on geostatistical model estimation and estimation of soil chemical properties at unsampled sites, considering simulated data. Our results will be used as scientific basis for spatial variability analyses of soil chemical properties in agricultural areas. Given the simulation results and agricultural data, we concluded that the high nugget effect values obtained here reduced spatial estimation efficiency. Moreover, a systematic sampling design promoted the least accurate estimates of geostatistical model and at non-sampled sites. Despite that, these nugget effect estimates should be kept in the analysis. However, further studies will be needed to investigate which factors are responsible for such high nugget effect values.http://www.scielo.br/pdf/eagri/v40n1/1809-4430-eagri-40-01-0096.pdfGeostatisticsSpatial Dependence Index (SDI)Relative Nugget Effect (RNE)Spatial Estimation |
| spellingShingle | Luciana P. C. Guedes Raquel T. Bach Miguel A. Uribe-Opazo NUGGET EFFECT INFLUENCE ON SPATIAL VARIABILITY OF AGRICULTURAL DATA Engenharia Agrícola Geostatistics Spatial Dependence Index (SDI) Relative Nugget Effect (RNE) Spatial Estimation |
| title | NUGGET EFFECT INFLUENCE ON SPATIAL VARIABILITY OF AGRICULTURAL DATA |
| title_full | NUGGET EFFECT INFLUENCE ON SPATIAL VARIABILITY OF AGRICULTURAL DATA |
| title_fullStr | NUGGET EFFECT INFLUENCE ON SPATIAL VARIABILITY OF AGRICULTURAL DATA |
| title_full_unstemmed | NUGGET EFFECT INFLUENCE ON SPATIAL VARIABILITY OF AGRICULTURAL DATA |
| title_short | NUGGET EFFECT INFLUENCE ON SPATIAL VARIABILITY OF AGRICULTURAL DATA |
| title_sort | nugget effect influence on spatial variability of agricultural data |
| topic | Geostatistics Spatial Dependence Index (SDI) Relative Nugget Effect (RNE) Spatial Estimation |
| url | http://www.scielo.br/pdf/eagri/v40n1/1809-4430-eagri-40-01-0096.pdf |
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