scholarly journals Environmental availability of micronutrients in tropical soils

2021 ◽  
Author(s):  
Elise Van Eynde
Keyword(s):  
Tropical Soils ◽  
Environmental Availability

Compressive response of some agricultural soils influenced by the mineralogy and moisture

2013 ◽  
Vol 27 (3) ◽  
pp. 239-246 ◽  
Author(s):  
A.E. Ajayi ◽  
M.S. Dias Junior ◽  
N. Curi ◽  
I. Oladipo
Keyword(s):  
Agricultural Soils ◽  
Tropical Soils ◽  
Homogeneity Test ◽  
Confined Compression ◽  
Moisture Retention ◽  
Soil Mineralogy ◽  
Undisturbed Soil ◽  
Statistical Homogeneity ◽  
Compressive Response ◽  
Fine Clay

Abstract This study aimed to investigate the mineralogy, moisture retention, and the compressive response of two agricultural soils from South West Nigeria. Undisturbed soil cores at the A and B horizons were collected and used in chemical and hydrophysical characterization and confined compression test. X-ray diffractograms of oriented fine clay fractions were also obtained. Our results indicate the prevalence of kaolinite minerals relating to the weathering process in these tropical soils. Moisture retention by the core samples was typically low with pre-compression stress values ranging from50 to 300 kPa at both sites. Analyses of the shape of the compression curves highlight the influence of soil moisture in shifts from the bi-linear to S-shaped models. Statistical homogeneity test of the load bearing capacity parameters showed that the soil mineralogy influences the response to loading by these soils. These observations provide a physical basis for the previous classification series of the soils in the studied area. We showed that the internal strength attributes of the soil could be inferred from the mineralogical properties and stress history. This could assist in decisions on sustainable mechanization in a datapoor environment.

New Homothallic Neurosporas from Tropical Soils

Mycologia ◽  
1969 ◽  
Vol 61 (2) ◽  
pp. 264 ◽  
Author(s):  
D. P. Mahoney ◽  
L. H. Huang ◽  
M. P. Backus
Keyword(s):  
Tropical Soils

scholarly journals Impact of ancient iron smelting wastes on current soils: Legacy contamination, environmental availability and fractionation of metals

2021 ◽  
Vol 776 ◽  
pp. 145929
Author(s):  
Adnane Amnai ◽  
Diane Radola ◽  
Flavien Choulet ◽  
Martine Buatier ◽  
Frédéric Gimbert
Keyword(s):  
Iron Smelting ◽  
Ancient Iron ◽  
Environmental Availability

scholarly journals Correlation between field electrical resistivity and geotechnical SPT blow counts at tropical soils in Brazil

2021 ◽  
pp. 100220
Author(s):  
Juliana Teles Diniz Gonçalves ◽  
Marco Antonio Barsottelli Botelho ◽  
Sandro Lemos Machado ◽  
Leonides Guireli Netto
Keyword(s):  
Electrical Resistivity ◽  
Tropical Soils
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