Post-mining deterioration of bauxite overburdens in Jamaica: storage methods or subsoil dilution?

Harris, Mark Anglin; Omoregie, Samson N.

doi:10.1007/s00254-007-0798-3

Cited by 11 publications

(12 citation statements)

References 6 publications

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“…Using hexametaphosphate and ultrasonics to free clay bound to Fe oxides, Ahmad et al (1966) found clay contents exceeding 60% in all local bauxite soils, and up to 90% in some replaced overburdens. The post-mined soil of this study, as is the case with other local post-mined soils (Greenberg and Wilding 2007) is higher in limestone fragments than the surrounding pre-mined soils, due most likely to mixing with the C-horizon on a limestone bedrock during the overburden removal process (Harris and Omoregie 2008).…”

Section: Study Area: a Former Mine-sitementioning

confidence: 98%

“…In general therefore, the higher the clay content, the greater is phosphate-fixing power, and karst bauxite contains over 60% clay (Bardossy 1982). This situation is exacerbated by clay enrichment of bauxite overburdens which often happens when deep mechanical mixing of topsoil with subsoil or ''inverted horizons'' occurs during overburden removal (Harris and Omoregie 2008). Differential horizontal zones of organic matter (hence varying fertility) therefore occur in the same overburden within short distances (often less than 2 m).…”

Section: Introductionmentioning

confidence: 97%

“…This decreases nutrient cycling, especially of phosphorus, the most readily bound macronutrient (Szucs 1987) as Al and Fe phosphates (Brady 1974), and the second most important plant nutrient next to N for plant growth and development (Szucs 1987). Minesite re-vegetation of bauxite overburdens is thus hampered by massive nutrient losses during soil storage (Hannan 1979;Harris and Omoregie 2008) exacerbated by hot, humid conditions causing high loss rates of added and intrinsic nutrients by volatilization (Ghose and Kumar 1997), leaching (Harris and Omoregie 2008), and P-fixation (Enwezor 1977).…”

Section: Introductionmentioning

confidence: 98%

“…In open cast mines, overburden removal and replacement can shift soil horizons containing organic matter (Harris and Omoregie 2008), thereby exacerbating phosphorus (P) fixation and availability in karst bauxite locations. High early growth rates are vital for high survival rates in minesite re-vegetation programs.…”

Section: Introductionmentioning

confidence: 99%

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Quenching of phosphorus fixation with organic wastes in a bauxite mine overburden

2010

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Capabilities of two phosphate-rich organic wastes to quench phosphorus (P) fixation in a stored highphosphorus-fixing tropical bauxite overburden were examined in a field experiment. Prior grinding and ensiling of shrimp shell waste facilitated increased solubility and hence phosphorus fixation quenching in the soil. Normal plantavailable P concentrations were exhibited by the overburden for up to 4 months after application despite the cultivation and harvesting of plants in the treated beds. Ten-year-old, stored overburden treated with ensiled shrimp shell silage, or chicken manure exhibited P levels of 1.0 and 1.1%, respectively, 4 months after treatment application. This represents a small excess over normal concentrations of free P in the overburdens. These P levels dropped to 0.055 and 0.060%, respectively, after 8 months. The capacity of the soil to fix phosphorus was thus rapidly ''filled'' with an excess of P in the overburden. However, increased P fixation in the second 4-month period was attributed to the inherently high levels of Ca 2? in the ground. Therefore, amelioration based on quarterly applications promises a long-term corrective for P-fixing in stored bauxite overburdens.

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Section: Study Area: a Former Mine-sitementioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Quenching of phosphorus fixation with organic wastes in a bauxite mine overburden

2010

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“…The well-drained kaolinite-dominated red bauxite soils (Harris & Omoregie, 2007) of south-central Jamaica (Mandeville) provided the dry soil conditions required for field testing the vigour of stem cuttings after transplanting. There were fifty sweet potato stem cuttings per treatment of 30 cm in length.…”

Section: Area and Treatmentsmentioning

confidence: 99%

Controlled Humidification of Sweet Potato Stem-Cuttings in a Self-Sustaining Humidifier: Effects on Vigour, and Implications for Climate Change

Harris¹

2015

JAS

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Predictions of extreme weather associated with global warming signify potential extremes in soil water content, and extremes of soil water tension are inimical to early plant growth. Periderm tissue [cork cells], being waterproof, restricts root and stem waterlogging whilst the promotion of early roots better prepare stem cuttings for survival in dry soils. Sweet potato stem cuttings were stored for up to six days in a chamber humidifier. Humidification was achieved by evaporation up to saturation vapour pressure [SVP] in a closed system of capillary water evaporating from a fabric which enclosed the cuttings. Treatments included vine cuttings stored (1) under grass clippings (traditional treatment) and (2) inside a high humidity (100%) chamber. Root growth occurred on 90% of the cuttings in the root length sequence: 9-, 28-, 47 mm after 3, 6 and 9 days respectively in the 100% humidity chamber at an average ambient room temperature of 25 o C. Under traditional treatments, root growth occurred on only 10% of the cuttings and was 0.5-, 2-, and 3 mm after 3, 6 and 9 days respectively. Traditional treatment did not exhibit observable periderm (cork cells) growth at any stage of the study. Periderm thicknesses of 3-, 7-, and 9mm occurred on days 3, 6, and 9 for samples held at 100% humidity. No periderm was observed for the traditionally treated samples. For field trials, the most vigorous growth in a dry soil was observed for cuttings previously subjected to chamber humidification, an important asset when early season weed competition is evident and when rapid ground cover is important. In a broader perspective, these results can be used to optimize studies of other crops grown from cuttings.

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Post-mining Nutrient Depletion of Bauxite Overburdens in Jamaica: Storage Methods or Subsoil Dilution?

Harris

Omoregie

2016

Geobiotechnological Solutions to Anthropogenic Disturbances

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Post-mining deterioration of bauxite overburdens in Jamaica: storage methods or subsoil dilution?

Cited by 11 publications

References 6 publications

Quenching of phosphorus fixation with organic wastes in a bauxite mine overburden

Quenching of phosphorus fixation with organic wastes in a bauxite mine overburden

Controlled Humidification of Sweet Potato Stem-Cuttings in a Self-Sustaining Humidifier: Effects on Vigour, and Implications for Climate Change

Post-mining Nutrient Depletion of Bauxite Overburdens in Jamaica: Storage Methods or Subsoil Dilution?

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