scholarly journals Spatial Variability of Particle Sizes of Coastal Plain Sands Soils of Southeastern Nigeria

Agro-Science ◽  
2012 ◽  
Vol 10 (2) ◽  
Author(s):  
JC Obi ◽  
PI Ogban ◽  
II Utuk
Keyword(s):  
Spatial Variability ◽  
Coastal Plain ◽  
Particle Sizes ◽  
Southeastern Nigeria

scholarly journals Effect of Cu and Zn on Maize (<i>Zea mays</i> L.) Yield and Nutrient Uptake in Coastal Plain Sand Derived Soils of Southeastern Nigeria

2014 ◽  
Vol 04 (07) ◽  
pp. 235-245 ◽  
Author(s):  
Ernest Ukpabi Eteng ◽  
Demian Okwudiri Asawalam ◽  
Anthony Osinachi Ano
Keyword(s):  
Zea Mays ◽  
Nutrient Uptake ◽  
Coastal Plain ◽  
Southeastern Nigeria ◽  
Cu And Zn

scholarly journals Modeling of Permanent Wilting from Particle Size Fractions of Coastal Plain Sands Soils in Southeastern Nigeria

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Chinedu Innocent Obi ◽  
Jude C. Obi ◽  
Emmanuel U. Onweremadu
Keyword(s):  
Particle Size ◽  
Coastal Plain ◽  
Particle Size Analysis ◽  
Coarse Sand ◽  
Size Analysis ◽  
Southeastern Nigeria ◽  
Size Fractions ◽  
Particle Size Fractions ◽  
Permanent Wilting Point ◽  
Wilting Point

Permanent wilting points in soils have been found to correlate significantly with particle size fractions. This study was conducted to establish functional relationship between soil particle size fractions and permanent wilting point of soils of coastal plain sands in southeastern Nigeria. A total of 102 surface samples were collected from three different dominantly Ultisols toposequences (i.e., 34 samples from each). Permanent wilting point experiment was carried out in pots with the 102 samples in the greenhouse while the particle size analysis was carried out in the laboratory. There was significant correlation among the textural separates, permanent wilting point correlated significantly with clay (, ). The general linear model showed significant differences between permanent wilting point of soils found in the upper and lower slope positions. Regression equation established that 54% of the total variation in permanent wilting point could be accounted for by the clay and coarse sand content of the soils. Prediction of permanent wilting point of Ultisols formed on coastal plain sands soils of humid tropical southeastern Nigeria will effectively depend on reliability of determination of clay and coarse sand contents of the soils.

scholarly journals Local Geology, Shear Strength Properties and Bearing Capacity of Coastal Plain Sands in Uyo Metropolis, Akwa-Ibom State, Southeastern Nigeria

2019 ◽  
pp. 1-23
Author(s):  
Abidemi Olujide Ilori ◽  
Charles Etim Akpan Uko ◽  
Ini Christopher Umoh
Keyword(s):  
Bearing Capacity ◽  
Coastal Plain ◽  
Shear Failure ◽  
Field Method ◽  
Strength Properties ◽  
Laboratory Method ◽  
Southeastern Nigeria ◽  
Shearing Resistance ◽  
Compressible Soil ◽  
Depth Of Investigation

The Bearing capacity of the soil within Uyo metropolis in South-Eastern State of Akwa Ibom was investigated in this study. The soil belongs to Coastal Plain Sand often called the Benin Formation in the geology of Niger Delta. Both Field and Laboratory methods were employed in the study. The field method consisted of Cone Penetration Test (CPT) with a 2.5 ton Dutch Guada cone penetrometer, and the Light weight penetrometer LRS 10. For the CPT, depth of investigation was refusal depth which varies from about 9.0 m to 20.0 m. The depth of investigation by the LRS 10 was not more than 6.0 m. The direct parameter the LRS 10 evaluates is the relative density. Soil sounding with the LRS 10 indicated for all the sites a ‘loose to medium’ consistency. No dense or very dense stratum was encountered. The Laboratory method employed was the Direct shear box tests This was used to determine the cohesive property and angle of shearing resistance of the soil, that is the C- ∅ property. The cohesion varies very widely; with a value ranging from a zero value to 54 kN/m2. The angle of shearing resistance ranges from 8º to 30.7º, with more than ninety percent falling below 28º, indicating a highly compressible soil that is prone to local shear failure. Ultimate bearing capacities are as low as 100.93 kN/m2 and as high as 571.1 kN/m2. Settlement associated with safe bearing pressure estimated from CPT data ranged from 0.35 cm to 3.89 cm. while that from laboratory gives lesser values, thereby making that from the field value conservative.

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