Cokriging of Soil Cation Exchange Capacity Using the First Principal Component Derived from Soil Physico-Chemical Properties

Liao, Kaihua; Su, Xu; Wu, Jichun; Ji, Shuhua; Qing, Lin

doi:10.1016/s1671-2927(11)60116-8

Cited by 10 publications

(14 citation statements)

References 27 publications

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“…The same was true for Na content in the OK model. However, the map produced presented a smaller range of values than the original dataset, which, according to [65], means that this model had low accuracy to describe the spatial variation of Na content, corroborating results found when predicting this property at both depths. The mean values for sand, clay, CEC, and Na content in both depths ( Table 4) are closer to the values of the original dataset.…”

Section: Predictive Modelssupporting

confidence: 77%

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Pedometric Tools Applied to Zoning Management of Areas in Brazilian Semiarid Region

Pinheiro¹,

Xavier²,

Anjos³

et al. 2020

Multifunctionality and Impacts of Organic and Conventional Agriculture

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Brazilian semi-arid region is a recent frontier in the country for agribusiness. The objective of this study is to apply pedometric tools to zoning areas with distinct potential and limitations to agricultural purposes. The research was set in three main steps: (i) to compile a database with all complete profile data collection; (ii) to analyze the vertical variability of soil properties and select a set of soil key properties useful to define the land potential and limitations; and (iii) to classify the area according to potential for agriculture, considering a medium technological level of the farmers. The quantitative methods applied are supported by geographic information systems (GIS) and spatial statistics. The soil data compilation was based on legacy data, with corresponding topographical data and information from remote sensing images of the area. Tree-based and geostatistical algorithms were applied to predict the spatial variability of the soil key properties. The definition of management zones was based on Iso Cluster and Maximum Likelihood Classification tools. The results pointed three different management zones according to risks of salinization and requirements for irrigation control. The approach showed to be a simple and useful way to select and recommend primarily potential areas for agriculture based on soil properties.

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Section: Predictive Modelssupporting

confidence: 77%

“…The semivariogram obtained for Na content (Figure 4) provides a description of the spatial dependence and indicates processes related with the spatial distribution [65]. For both depths, the best semivariogram was the exponential model.…”

Section: Predictive Modelsmentioning

confidence: 97%

Pedometric Tools Applied to Zoning Management of Areas in Brazilian Semiarid Region

Pinheiro¹,

Xavier²,

Anjos³

et al. 2020

Multifunctionality and Impacts of Organic and Conventional Agriculture

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show abstract

“…The CEC is calculated on the basis of concentration of sodium ion in extract. In order to estimate the CEC is also proposed the use of instrumental methods [20], artificial neural network [21] and geostatistical methods [22].…”

Section: +mentioning

confidence: 99%

A Comparison of Methods for the Determination of Cation Exchange Capacity of Soils/Porównanie Metod Oznaczania Pojemności Wymiany Kationów I Sumy Kationów Wymiennych W Glebach

Jaremko

Kalembasa

2014

Ecological Chemistry and Engineering S

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Abstract:The object of this study was to compare the results obtained with four methods of determination of cation exchange capacity (CEC) and sum of exchangeable cations (Ca, Mg, K) in soils. One of these methods is Kappen's method and the others methods are based on different extracting reagents: sodium acetate (pH = 8.2), barium chloride and hexaamminecobalt(III) chloride. Values measured with barium ions and hexaamminecobalt(III) ions as index cations are very comparable and these two methods can be considered as equivalent. Kappen's method gives overestimated results, especially for acid soils reach in organic matter and very calcareous soils. Sodium acetate, buffering the pH of the extracting solution, causes increase of numbers of negatively charged sites and particularly those bonded to organic matter and for this reason values obtained with this method are overestimated. Nevertheless, it is possible to correct this error for a given soil sample by regression equation considering pH of soil, clay and organic carbon content.

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“…In order to estimate the detailed information of the soil quality based on soil productivity potential and cultivated suitability, a weighted-additive system is selected to calculate soil quality index [18][19][20][21][22][23]. Besides seven indicators covering chemical and physical properties of soils (e.g., soil depth, soil organic matter/SOM, total nitrogen (TN), available phosphorus (AP), available potassium (AK), pH and soil texture), an additional topographic indicator (slope) is introduced.…”

Section: Soil Quality Assessmentmentioning

confidence: 99%

The Accelerated Urbanization Process: A Threat to Soil Resources in Eastern China

Deng

et al. 2015

Sustainability

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Cokriging of Soil Cation Exchange Capacity Using the First Principal Component Derived from Soil Physico-Chemical Properties

Cited by 10 publications

References 27 publications

Pedometric Tools Applied to Zoning Management of Areas in Brazilian Semiarid Region

Pedometric Tools Applied to Zoning Management of Areas in Brazilian Semiarid Region

A Comparison of Methods for the Determination of Cation Exchange Capacity of Soils/Porównanie Metod Oznaczania Pojemności Wymiany Kationów I Sumy Kationów Wymiennych W Glebach

The Accelerated Urbanization Process: A Threat to Soil Resources in Eastern China

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