New, Comprehensive Soil Chemical Methods Book for Australasia

Rayment, G. E.; Lyons, Daniel

doi:10.1080/00103624.2012.641802

Cited by 33 publications

(18 citation statements)

References 14 publications

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“…To determine the pyrophosphate extractable C, an adaptation of the method described by Rayment and Lyons (2011) was used. In a 250 mL centrifuge tube, 1.0 g of air-dried soil (< 2 mm) and 100 mL of sodium pyrophosphate solution (Na 4 P 2 O 7 .10H 2 O) (44.61 g L −1 ) were added together, and the mixture was continuously shaken in an end-over-end shaker for 16 hours.…”

Section: Pyrophosphate Extractable Cmentioning

confidence: 99%

Carbon pool ratios as scientific support to field morphology in the differentiation of dark subsurface soil horizons

Toma

Owens

Silva

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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In soil surveys, it is usual to find profiles with an uncommon disposition of horizons.Dark horizons in depth might be either the consequence of erosion and redeposition of soil materials from upslope or an indication of the podzolization process, which forms a spodic horizon.Few laboratory analyses are known to characterize dark subsurface horizons which could allow for the differentiation of spodic from buried A horizons. Some researchers propose C-humic and C-fulvic acid fraction ratios and forms of carbon to analyze characteristics of these horizons.Therefore, this research aimed to characterize dark subsurface horizons found in soils under a Eucalyptus minimum tillage system in the state of Rio Grande do Sul, Brazil, and to relate soil organic carbon to landscape features in toposequences. The characterization was performed by using the following ratios: humic acid and fulvic acid fractions (Cha/Cfa); pyrophosphate extractable-C and organic carbon (Cp/OC); fulvic acid fraction and pyrophosphate extractable-C (Cfa/Cp), and fulvic acid fraction and organic carbon (Cfa/OC). Soil organic carbon was related to slope gradient and Geomorphons in a Geographic Information System (GIS). None of the horizons analyzed met the criteria required for spodic horizon classification, where Cha/Cfa < 0.50, Cfa/OC < 0.30, and the ratio Cp/OC ≥ 0.50 simultaneously with Cfa/Cp ≥ 0.50. A relationship was found between landscape features and soil organic carbon content. The methodology proved to be satisfactory for providing scientific support to field morphology classification of dark subsurface horizons, specifically in the case where they could be misinterpreted as spodic horizons.

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Section: Pyrophosphate Extractable Cmentioning

confidence: 99%

Carbon pool ratios as scientific support to field morphology in the differentiation of dark subsurface soil horizons

Toma

Owens

Silva

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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“…Therefore fertility of the soil is high if they have larger quantities of negatively charged ions (McKenzie et al, 2004), however, many crops and pastures can be grown on soils with low CEC. The main ions associated with CEC in soils are the exchangeable cations Ca 2+ , Mg 2+ , Na + and K + (Rayment, 2009), and are commonly referred to as the base cations.…”

Section: Cation Exchange Capacity (Cec) Of the Soilsmentioning

confidence: 99%

Predicting Suitability of Upland Rice for Adoption as Food Security and Poverty Alleviation Crop in Uganda

Ojara¹,

Ann²,

Aribo³

et al. 2017

JGES

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This study was carried out in Uganda with the aim of developing a suitability map for upland rice crop based on physio-chemical soil properties and climatic factors. The analysis used physio-chemical variables of soil pH, Cation Exchange Capacity of the soils (CEC), Soil organic carbon (SOC), Digital elevation (DEM) and 19 bioclimatic variables. The physio-chemical suitability maps were derived using Geographical information system approach based on weighted overlay analysis in ArcGIS10.3, while the climate suitability map was generated using MaxEnt species distribution model. The cross raster overlay operations were done in ILWIS 3.3 to combine the overall physio-chemical suitability and climate suitability maps into the final Upland rice suitability map and the area under each suitability class calculated. The overall results show that 18.1% (43598.71km 2 ) of the arable land is suitable (S) for Upland rice production while another 20.8% (50135.63km 2 ) is moderately suitable (MS) for Upland rice production. About the same proportions of the combined Moderately (MS) and Suitable (S), 37.8% (91278.96km 2 ) is marginally suitable (mS) for Upland rice production, while just above 23.4 % (56376. 9km 2 ) of the Arable land is currently not suitable (nS) for Upland rice production.

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“…The Mehlich 3 extractant can be used for a multiple-element extraction from soils with a relatively wide pH range (with some limitations for carbonate soils) and it has a potential for a simultaneous determination of plant available nutrients, micronutrients (e.g. Mehlich 1984, Jones 1990, Ostatek-Boczynski and Lee-Steere 2012, sulphur (Zbíral 1999), index of phosphorus retention (Rayment and Lyons 2011) and also for determination of available fractions of some risk elements in soils (e.g. Minca et al 2012Minca et al , Čižmárová et al 2016).…”

mentioning

confidence: 99%

Determination of plant-available micronutrients by the Mehlich 3 soil extractant - a proposal of critical values

Zbíral¹

2016

Plant Soil Environ.

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New, Comprehensive Soil Chemical Methods Book for Australasia

Cited by 33 publications

References 14 publications

Carbon pool ratios as scientific support to field morphology in the differentiation of dark subsurface soil horizons

Carbon pool ratios as scientific support to field morphology in the differentiation of dark subsurface soil horizons

Predicting Suitability of Upland Rice for Adoption as Food Security and Poverty Alleviation Crop in Uganda

Determination of plant-available micronutrients by the Mehlich 3 soil extractant - a proposal of critical values

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