Spatial and Temporal Variability of Sulphate Concentration in Soils

Bloem, Elke; Haneklaus, Silvia; Sparovek, Gerd; Schnug, Ewald

doi:10.1081/css-100104201

Cited by 24 publications

(11 citation statements)

References 19 publications

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“…1) delivered no significant relationship between the SO 4 -S content of the soil and S concentration in plants in humid conditions (44). 1) delivered no significant relationship between the SO 4 -S content of the soil and S concentration in plants in humid conditions (44).…”

Section: Reprintsmentioning

confidence: 97%

Optimization of a method for soil sulphur extraction

Bloem¹,

Haneklaus²,

Schnug³

2002

Communications in Soil Science and Plant Analysis

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Numerous methods for the determination of soil sulphur (S) have been developed and tested in field conditions, but so far none of them have shown a satisfying relationship to crop yield. Therefore, these methods are not suitable to be used to evaluate the sulphur supply or to determine the sulphur fertilizer demand. In this paper a successful approach was adapted and optimized for routine analysis in soils in humid conditions. Modifications included a comparison of soil incubation with shaking, changes in the concentration of the extractant, the soil-to-extractant ratio, the time of shaking, particle size of the soil and method of detection. The best results in terms of a high reproducibility and sensitivity of the method for soils with extremely low, but also high, sulphur contents were obtained when the soil was extracted in a 1:5 ratio with 0.025 M KCl, shaken for 3 hr and then filtered. The method is suitable for ICP and IC measurement, whereby IC is preferable on low sulphur soils because of the higher detection limit. 41

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Section: Reprintsmentioning

confidence: 97%

Optimization of a method for soil sulphur extraction

Bloem¹,

Haneklaus²,

Schnug³

2002

Communications in Soil Science and Plant Analysis

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“…In many areas, accurate description of field scale variation in soil properties can require sampling densities that are prohibitively costly (Franzen and Peck 1995;Wollenhaupt et al 1994). For example, Bloem et al (2001) found that a sampling interval of no more than 25 m was required to determine spatially correlated values in soil sulphate concentrations.…”

Section: Introductionmentioning

confidence: 99%

Within and between-field spatial variation in soil phosphorus in permanent grassland

2008

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Soil phosphorus (P) concentrations above certain critical thresholds are a problem in many areas leading to its transport into surface and ground waters. Site-specific nutrient applications and the development of nutrient management plans for farms would help to optimize nutrient applications, meet crop requirements and take into consideration current soil nutrient status. In Northern Ireland, high concentrations of soil P are common, whereas low concentrations of soil potassium (K) and sulphur (S) have been reported in many silage fields. This study used grid and transect soil sampling to measure within-and between-field spatial variation in soil Olsen-P status across a 50-ha permanent grassland site used for silage production. Soil phosphorus indices ranged from Index 1 to Index 4 within single fields. The spatial patterns of soil P across fields suggested that there was scope for site-specific P fertilizer applications, with variable quantities of P being applied to different fields and within individual fields. Site-specific nutrient management has the potential to reduce excess P applications in some areas and avoid deficiencies in others, thereby minimizing environmental problems and optimizing yield.

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“…This would explain the positive effect of the high irrigation treatment. Possible interactions between sulfur fertilization and the regime of water supplied to Brassicas have been suggested (Karmoker et al 1991;Bloem et al 2001), but we do not have enough evidence to speculate further on this.…”

Section: Relevance Of Ion-pair Adsorptionmentioning

confidence: 82%

Sulfate and Calcium Movement in an Allophanic Soil—The Relevance of Ion‐Pair Adsorption in the Soil–Plant System

Cichota

Vogeler

Bolan

et al. 2009

Communications in Soil Science and Plant Analysis

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Cooperative adsorption involving anions and cations, termed ion-pair adsorption (IPA), is reported to increase the retention of some ions in certain soils. Sulfate and calcium can exhibit such interaction, and this affects their movement through the soil. Ion-pair adsorption is shown here in miscible displacement experiments with a variable-charge soil. The relevance of IPA under more realistic conditions is further investigated in a pot experiment. Rapeseed (Brassica napus) was grown at two different irrigation regimes and with two sulfur fertilizer sources. Calcium sulfate (CaSO 4 ?2H 2 O) was used to induce IPA in contrast to potassium sulfate (K 2 SO 4 ). The results suggest that IPA reduces sulfate and calcium leaching only in the short term. Continued irrigation dissipates the differences between the two fertilizer sources. Final soil ion concentrations and the plant uptake could not be related to IPA, evidencing the short-term relevance of IPA. The influence of IPA on the bioavailability of calcium and sulfate to plants still demands further study.

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Spatial and Temporal Variability of Sulphate Concentration in Soils

Cited by 24 publications

References 19 publications

Optimization of a method for soil sulphur extraction

Optimization of a method for soil sulphur extraction

Within and between-field spatial variation in soil phosphorus in permanent grassland

Sulfate and Calcium Movement in an Allophanic Soil—The Relevance of Ion‐Pair Adsorption in the Soil–Plant System

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