Contents and profile distribution of three forms of free iron oxides in three ultisois and an alfisol in Nigeria

Mosugu, M.E.; Chude, V. O.; Esu, I. E.; Kparmwang, T.; Malgwi, W. B.

doi:10.1080/00103629909370264

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…Mean values for soils on MS was significantly greater than those on the QZ, OG and MG, while values on soils on MG parent material was significantly lower. The values of Fe x were generally within range for soils on the older granite and basalts in the Northern Guinea Savanna (Mosugu et al, 1999). The values obtained were higher than those obtained on the aeolian materials by and Owonubi et al (2003).…”

Section: Bajopas Volume 7 Number 2 December 2014mentioning

confidence: 50%

Forms of iron in soils on basement complex rocks of Kaduna state in northern guinea Savanna of Nigeria

Maniyunda¹,

Raji²,

Odunze³

et al. 2015

Bayero J. Pure App. Sci.

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The forms of iron extracted by different methods were studied in soils developed on four basement complex rocks within Northern Guinea Savanna of Nigeria namely: migmatite gneisses, older granite, quartzites and mica schists. The study shows that forms of iron generally decreased in the order of total elemental iron (Fe T) determined by XRF > double acid extractable total iron (Fe a) > dithionite extractable iron oxide (Fe d) > oxalate extractable iron oxide (Fe x) > pyrophosphate extractable iron oxide (Fe p) > 0.1M HCl extractable micronutrient available iron (Fe h). Variation in content of total irons (Fe T and Fe a) were not significant in the soils, but content of Fe h , Fe d , Fe x and Fe x/d significantly varied in the soils on the various parent materials. Therefore processes and extent of pedogenesis were considered to influence the variations resulting in recrystallization and increase in content of Fe h and Fe d in these soils. The significant correlation between various forms of Fe (Fe a , Fe d , and Fe x) with active iron ratio further affirmed that as soils on basement complexes increase in their pedogenetic age, Fe content generally increases irrespective of total forms of iron. The strong correlation between Fe T , Fe a and Fe d indicate that these forms of iron were extracted from similar sources.

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Section: Bajopas Volume 7 Number 2 December 2014mentioning

confidence: 50%

Forms of iron in soils on basement complex rocks of Kaduna state in northern guinea Savanna of Nigeria

Maniyunda¹,

Raji²,

Odunze³

et al. 2015

Bayero J. Pure App. Sci.

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“…Concentrations of Fe d in soils range from 3.6 to 73.5 g kg À1 with a median value of 12.6 g kg À1 which is mostly greater than values for Thai red Ultisols (6.7À25 g kg À1 ) but smaller than red Oxisols (49À121 g kg À1 ) (Trakoonyingcharoen et al, 2006). These values are similar to those for Ultisols from Nigeria (5À80 g kg À1 ) (Mosugu et al, 1999) and Indonesian red soils (24À82 g kg À1 ) (Siradz, 2000) but greater than those for Western Australian soils (median 6.2 g kg À1 ) (Singh & Gilkes, 1992b). The greatest values of Fe d in the present study are for soils that developed on basalt (26.1À73.5 g kg À1 , median 49.1 g kg À1 ) followed by those on shale/limestone (9.6À43.8 g kg À1 , 17.8 g kg À1 ), sandstone (3.6À35.7 g kg À1 , 7.5 g kg À1 ), and granite (3.8À 12.4 g kg À1 , 5.8 g kg À1 ), respectively.…”

Section: Dithionite-and Oxalate-extractable Fe and Al For Soilsmentioning

confidence: 55%

Iron oxides in tropical soils on various parent materials

Wiriyakitnateekul¹,

Suddhiprakarn²,

Kheoruenromne³

et al. 2007

Clay miner.

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Twenty nine Fe oxide concentrates of Thai soils formed on basalt, sandstone, shale/limestone and granite were investigated. Goethite and hematite are relatively more abundant in granitic and basaltic soils, respectively. Values of Feo/Fed range from 0.01 to 0.28 indicating that free Fe oxides are mostly crystalline.There are no systematic differences in unit-cell dimensions for goethite and hematite in soils on different parent materials. Mean crystallite dimensions calculated from the 110 reflections are greater for hematite than for goethite. Aluminium substitution varies from 8 to 24 mole% for goethite and from 4 to 17 mole% for hematite. The dehydroxylation temperature for goethite ranges from 285ºC to 320ºC. The goethite in basaltic soils has a smaller crystal size and Al substitution, as well as a lower dehydroxylation temperature, compared to soils on other parent materials. The dehydroxylation temperature of goethite is positively related to Al substitution (R = +0.58), MCD110 (R = +0.49) and Ald (R = +0.53). The Mn, Ni, Cr, V and P in these soils occur in Fe oxides rather than as discrete minerals.

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“…A combination of these biotic and abiotic processes would likely relate to the negative correlations observed between NO 3 – and NH 4 + contents in soils from Pumanque and Requínoa, where in the former NH 4 + increased and NO 3 – decreased 33 months after land burning, and in the latter NH 4 + decreased and NO 3 – increased after 17 months of forest fire occurrence. On the other hand, lower P and Fe contents in burned soils from Requínoa might be related to losses of Fe/P bound to organic matter (OM) in fire-affected soils ( Norouzi and Ramezanpour, 2013 ), which might have migrated from surface to lower horizons ( Mosugu et al, 1999 ). In addition, both study locations showed a slight increase in pH in burned soils, which was expected due to the OH – and cation release from the denaturation of OM occurring after fires ( Certini, 2005 ; Alcañiz et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Microbial Community-Level Physiological Profiles and Genetic Prokaryotic Structure of Burned Soils Under Mediterranean Sclerophyll Forests in Central Chile

et al. 2022

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Forest fires alter soil microbial communities that are essential to support ecosystem recovery following land burning. These alterations have different responses according to soil abiotic pre- and post-fire conditions and fire severity, among others, and tend to decrease along vegetation recovery over time. Thus, understanding the effects of fires on microbial soil communities is critical to evaluate ecosystem resilience and restoration strategies in fire-prone ecosystems. We studied the state of community-level physiological profiles (CLPPs) and the prokaryotic community structure of rhizosphere and bulk soils from two fire-affected sclerophyll forests (one surveyed 17 months and the other 33 months after fire occurrence) in the Mediterranean climate zone of central Chile. Increases in catabolic activity (by average well color development of CLPPs), especially in the rhizosphere as compared with the bulk soil, were observed in the most recently affected site only. Legacy of land burning was still clearly shaping soil prokaryote community structure, as shown by quantitative PCR (qPCR) and Illumina MiSeq sequencing of the V4 region of the 16S rRNA gene, particularly in the most recent fire-affected site. The qPCR copy numbers and alpha diversity indexes (Shannon and Pielou’s evenness) of sequencing data decreased in burned soils at both locations. Beta diversity analyses showed dissimilarity of prokaryote communities at both study sites according to fire occurrence, and NO3– was the common variable explaining community changes for both of them. Acidobacteria and Rokubacteria phyla significantly decreased in burned soils at both locations, while Firmicutes and Actinobacteria increased. These findings provide a better understanding of the resilience of soil prokaryote communities and their physiological conditions in Mediterranean forests of central Chile following different time periods after fire, conditions that likely influence the ecological processes taking place during recovery of fire-affected ecosystems.

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Contents and profile distribution of three forms of free iron oxides in three ultisois and an alfisol in Nigeria

Cited by 9 publications

References 11 publications

Forms of iron in soils on basement complex rocks of Kaduna state in northern guinea Savanna of Nigeria

Forms of iron in soils on basement complex rocks of Kaduna state in northern guinea Savanna of Nigeria

Iron oxides in tropical soils on various parent materials

Microbial Community-Level Physiological Profiles and Genetic Prokaryotic Structure of Burned Soils Under Mediterranean Sclerophyll Forests in Central Chile

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