The effect of particle size on the availability of brimstone sulphur to white clover

Weir, R. G.; Barkus, B.; Atkinson, W. T.

doi:10.1071/ea9630314

Cited by 17 publications

(5 citation statements)

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“…A possible explanation for this result may the phosphogypsum chemical characteristics, which were exhausted in the soil root zone of the wheat that was cropped 30 months after the last reapplication. In a Podzolic soil, no residual effect of gypsum was reported by Weir et al (1963) 16 months after application. According to Caires et al (2011), in a clayey, kaolinitic, Rhodic Hapludox subtropical soil previously used for pasture, more than 50% of the applied exchangeable Ca from gypsum was leached into soil layers deeper than 0.60 m after 27 months.…”

Section: Biomass Production and Organic Matter Input Into Soilmentioning

confidence: 84%

Lime and phosphogypsum impacts on soil organic matter pools in a tropical Oxisol under long-term no-till conditions

Filho

Penn

Crusciol

et al. 2017

Agriculture, Ecosystems & Environment

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Improving soil organic matter (SOM) quality in tropical acid soils is important for increasing the sustainability of agricultural ecosystems. This research evaluated the effect of the surface application of lime and phosphogypsum on the quality and amount of SOM in a long-term crop rotation under no-till conditions. The research was performed in a kaolinitic, thermic Typic Haplorthox for 12 years with annual crops under no-till. The treatments included no soil amendments, and amendment with phosphogypsum, lime, and lime + phosphogypsum. After three applications of soil amendments (2002, 2004, and 2010), surface liming increased the SOM input through addition of aboveground and root biomass, varying amount according to crop species, growing season, and soil depth. Although phosphogypsum had no effect on plant biomass production, the application of phosphogypsum with lime increased nitrogen (N) by up to 50% in the uppermost soil depths. The application of lime alone significantly increased the total organic carbon (TOC) at all depths, although the greatest effects were observed at 0.10-0.20 and 0.20-0.40 m, with an increase of 44% and 41%, respectively. Moreover, lime + phosphogypsum also exhibited the highest potential for C mineralization, which was attributed to an increased proportion of TOC as particulate organic carbon (POC). The proportion of TOC as humin and fulvic acid increased with the application of lime + phosphogypsum at 0-0.05 m, with an increase from 55% to 92% and from 1.4% to 1.6%, respectively. Overall, the combination of lime and phosphogypsum increased both the labile and stable C pools.

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Section: Biomass Production and Organic Matter Input Into Soilmentioning

confidence: 84%

Lime and phosphogypsum impacts on soil organic matter pools in a tropical Oxisol under long-term no-till conditions

Filho

Penn

Crusciol

et al. 2017

Agriculture, Ecosystems & Environment

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“…The results of this trial indicate that, provided the elemental S particle size is below about 0.5 mm, the presence or absence of rapid S oxidizers makes little difference to elemental S release rates. This particle size factor should be of little concern when elemental S fertilizers are applied commercially since it is generally recognized that to be agriculturally useful, elemental S particles must be less than 0.5 mm in diameter (Weir et al, 1963;Spencer, 1968;Jones and Ruckman, 1969;Barrow, 1971;Kiemnec et al, 1981 ).…”

Section: Inoculationmentioning

confidence: 99%

Particle Size and Soil Texture Effects on Elemental Sulfur Oxidation¹

McCaskill¹,

Blair

1987

Agronomy Journal

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Most previous experiments examining factors affecting the conversion of elemental S into plant‐available forms have used indirect methods, such as measuring sulfate accumulation, and have at times resulted in exaggerated estimates of elemental S oxidation rates. Direct measurement of residual elemental S offers a more reliable estimate of conversion rate, but only some of the factors known to affect conversion rate have been investigated by direct methods. A pot experiment was conducted over 238 days to measure conversion rates under a range of elemental S particle sizes (0.1–2.0 mm) and soil textures, and with and without inoculation with sulfur‐oxidizing bacteria. Conversion rates were measured by two indirect methods—S uptake by plants and 35SO4 dilution‐and one direct method—acetone extraction of remaining elemental S. Initial surface area of elemental S was the prime determinant of conversion rate, but three other factors had to be considered to fully explain observed release characteristics. These were (i) a gradual particle disappearance in 0.1‐ and 0.2‐mm particles, which caused a reduction in conversion rate with time, (ii) a depression in conversion rate for particle sizes ≧ 0.4 mm on noninoculated treatments, and (iii) shape considerations that were imputed to the observed lower conversion rates for the more spherical 2.0‐mm size. Three of the four soils—an Arenic Haplustult, a Plinthic Haplustult, and a Typic Torrert—showed increased conversion rates in response to inoculation, with inoculation responses most marked for the larger (> 0.4 mm) particle sizes. The other soil—a Udic Ustochrept—was not responsive to inoculation. No relationship was detected between soil texture and elemental S conversion rate over a range of clay contents from 9 to 52%.

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“…Thus the smaller the particle size, the greater the surface area and the greater the rate of oxidation. This relationship is well illustrated by the data given by ATrOE and OLSON 1966, Fox et al 1964, LI and CALDWELL 1966, and WEIR, BARKUS and ATKINSON 1963 III. Oxidation of Organic Sulphur in Soil…”

Section: E) Effect Of Particle Sizementioning

confidence: 62%

Oxidation of sulphur in soils

Freney

1967

Mineral. Deposita

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This paper reviews briefly the forms of sulphur in soils and discusses the factors affecting the oxidation of this sulphur to other oxidation states. This oxidation is believed to be carried out mainly be micro-organisms but in many cases strictly chemical reactions are involved. Invironmental factors such as temperature, moisture, and pH, as well as microbial population and particle size influence the rate of sulphur oxidation in soil. Plants normally absorb sulphur in the form of sulphate, and thus the oxidation of sulphide, elemental sulphur and organic sulphur is of prime importance in plant nutrition.

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The effect of particle size on the availability of brimstone sulphur to white clover

Cited by 17 publications

References 0 publications

Lime and phosphogypsum impacts on soil organic matter pools in a tropical Oxisol under long-term no-till conditions

Lime and phosphogypsum impacts on soil organic matter pools in a tropical Oxisol under long-term no-till conditions

Particle Size and Soil Texture Effects on Elemental Sulfur Oxidation¹

Oxidation of sulphur in soils

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The effect of particle size on the availability of brimstone sulphur to white clover

Cited by 17 publications

References 0 publications

Lime and phosphogypsum impacts on soil organic matter pools in a tropical Oxisol under long-term no-till conditions

Lime and phosphogypsum impacts on soil organic matter pools in a tropical Oxisol under long-term no-till conditions

Particle Size and Soil Texture Effects on Elemental Sulfur Oxidation1

Oxidation of sulphur in soils

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Product

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Particle Size and Soil Texture Effects on Elemental Sulfur Oxidation¹