Soil clay mineralogies in relation to fertility management: Effect of soil clay mineral compositions on phosphorus fixation under conditions of wetland rice culture

Bajwa, M. I.

doi:10.1080/00103628109367167

Cited by 4 publications

(3 citation statements)

References 7 publications

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Section: P Sorption Parameters For Clay Fractionssupporting

confidence: 93%

“…This could be attributed to the higher kaolinite percentage in the former relative to the latter. This observation is consistent with the findings by Bajwa [37] that clay fractions with predominantly kaolinites are the greatest P-fixers, followed by those having them as a major component. The bounding energy values (a) of the clay fractions that were developed from basalt and granite were marginally similar, with average values of 0.55 and 0.62; whereas the clay fractions that were developed from gneiss had the smallest average value of 0.23 (Table 3).…”

Section: P Sorption Parameters For Clay Fractionssupporting

confidence: 93%

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Phosphorus Sorption in Soils and Clay Fractions Developed from Different Parent Rocks in Limpopo Province, South Africa

2022

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Phosphorus (P) sorption dynamics in soils have implications for the environment and soil fertility. Soils and clay fractions that were developed from basalt, granite, arkosic sandstone, and gneiss in Limpopo Province, South Africa were analysed for their P adsorption characteristics and external phosphorus requirements (EPR). The relationship between the P adsorption parameters and EPR of the soils and clay fractions were also assessed. The Langmuir adsorption isotherms for the soils and clay fractions gave a better fit with slightly higher R-square values relative to the Freundlich adsorption isotherms. The Langmuir P sorption maxima were between 285.71 and 833.33 mg/kg and 238.09 and 625.0 mg/kg for the soils and clay fractions, respectively, and the EPR values ranged from 7.78 to 92.91 mgP/kg and 5.13 to 65.85 mgP/kg for the soils and clay fractions, respectively. The variations in the EPR suggest a single, uniform P fertiliser application to the soils could cause under-fertilisation and over-fertilisation problems. The soils that were developed from basalt, relative to the others, showed no risk to the water quality in the region at the current rate of P fertiliser application. The P sorption parameters of the soils and clay fractions showed no statistically significant differences. Hence, the P sorption parameters of the clay fractions could be reliable predictors of the P sorption and buffering in their respective soils.

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Section: P Sorption Parameters For Clay Fractionssupporting

confidence: 93%

Section: P Sorption Parameters For Clay Fractionssupporting

confidence: 93%

Phosphorus Sorption in Soils and Clay Fractions Developed from Different Parent Rocks in Limpopo Province, South Africa

2022

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“…Generally, the sorption of phosphates is affected by the type and nature of the reactive sites of clay minerals. Oxides and hydroxides of Fe and Al such as hematite, goethite and gibbsite are species primarily responsible for the adsorption of large quantities of phosphates [54] [55]. The availability of phosphate ions for plant uptake is greatly dependent on reactions with clay minerals through adsorption and precipitation processes [54].…”

Section: Nh +mentioning

confidence: 99%

Influence of Clay Minerals on Some Soil Fertility Attributes: A Review

Kome¹,

Enang²,

Tabi³

et al. 2019

OJSS

138

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Clay minerals constitute an important component of the soil system and knowledge of their role in soil fertility is imperative for sustainable soil management and productivity. The aim of this work is to overview the influence of clay minerals on some major soil fertility attributes. The rationale for carrying out this work is that most soil fertility studies rarely incorporate soil mineralogy. Clay minerals, through their physical and chemical properties, affect soil fertility by controlling nutrient supplies and availability, through the sequestration and stabilization of soil organic matter, by controlling soil physical properties through microaggregate formation, by influencing soil acidity and controlling soil microbial population and activity. The main processes involved in these relationships are dissolution-precipitation and adsorption-desorption processes, alongside mechanisms involving the formation of short-range-ordered phases. Although the determination of soil mineralogical properties is very costly and time-consuming, information about a soil's mineralogy is imperative for a holistic understanding and proper management of soil fertility. Therefore, the development of rapid, low-cost, reliable and efficient techniques of soil mineralogical analysis, directly applicable to soil fertility investigations, constitutes a major challenge. Also, future research should investigate the relationships between clay minerals and soil nitrogen vis-à-vis sequestration and stabilization. Lastly, clay minerals should be considered in studies dealing with soil quality assessment, especially in the choice of soil quality indicators.

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Distinct microbiome and nutrient status of a saline hydromorphic soil under rice cultivation in comparison with laterite soil

Unnikrishnan

Binitha

Mohan

2022

Ecological Genetics and Genomics

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Soil clay mineralogies in relation to fertility management: Effect of soil clay mineral compositions on phosphorus fixation under conditions of wetland rice culture

Cited by 4 publications

References 7 publications

Phosphorus Sorption in Soils and Clay Fractions Developed from Different Parent Rocks in Limpopo Province, South Africa

Phosphorus Sorption in Soils and Clay Fractions Developed from Different Parent Rocks in Limpopo Province, South Africa

Influence of Clay Minerals on Some Soil Fertility Attributes: A Review

Distinct microbiome and nutrient status of a saline hydromorphic soil under rice cultivation in comparison with laterite soil

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