Environmental impact assessment of oil and gas sector: A case study of Magurchara gas field
July 2010
This study focuses on the environmental impact assessment of Magurcherra gas field through environmental, socio-economical and meteorological study. The major activities involved are seismic activities, drilling activities, exploration and production. In the case of Magurcherra gas field, improper planning and drilling activities have created explosion and caused huge environmental damage. In order to evaluate the...
Manure application setback effect on phosphorus and sediment in runoff
July 2010
Surface application of animal manure increases nutrients at the soil surface with increased potential for nutrient loss in runoff. Non-application setbacks are often required with the intent to reduce nutrient loss to surface water. The objective of this research was to determine the effect of setback distance on phosphorus and sediment in runoff. The research was conducted in eastern Nebraska on 24 ha of a terraced...
Characterizing sites for the design and restoration of Kalacha irrigation scheme, Chalbi district, Kenya: Socio-economic and biophysical considerations
July 2010
Site characterization was carried out in Kalacha irrigation scheme for the design and restoration of the scheme. Detailed soil survey was carried at the scale of 1:2,000, through systematic observations, where the soils were described in terms of depth, texture, structure and consistence. Based on these characteristics, four soil units were identified and designated as block A, B, C and D, covering 23, 18, 17 and 42% of...
The potential of four non traditional legumes in suppressing the population of nematodes in two Ghanaian soils
June 2010
Most African farmers could not afford the purchase of pesticides to control crop pest, alternatives such as the use of phytochemicals are most useful. For best results, sound recommendations are needed on the use of different antagonistic plants in controlling pest. In Ghana few reliable data are available on the potential of antagonistic plants to control nematode population. A field trial was conducted in the forest...
Enhancement of steel sheet-piling quay walls using grouted anchors
June 2010
Steel sheet-pilings are one of the most common types of quay walls used in the construction of ports and harbors facilities, especially for berths of small crafts which have small dimensions and capacity. Due to the growing market of marine traffic around the world, an increasing number of these berths are required to be upgraded to meet the requirements of permanently growing dimensions and capacity of vessels. Several...
Application of queuing theory to the container terminal at Alexandria seaport
June 2010
This paper describes a methodology designed to support the decision-making process by developing seaport infrastructure to meet future demand. In order to determine an optimum number of berths at a sea port, the queuing theory is applied in the light of port facilities and activities. The aim is to avoid inadvertent over and under-building. Within this methodology, the movements in port should firstly be analyzed....
The utilization of wood ash as manure to reduce the use of mineral fertilizer for improved performance of maize (Zea mays L.) as measured in the chlorophyll content and grain yield
May 2010
The increasingly high cost of mineral fertilizers and a preferred economic disposal of wood ash had necessitated a research in the use of wood ash to reduce the rate of fertilizer application for maize production. The comparative effects of wood ash and NPK 15-15-15 on maize were investigated in Akure (7015’N, 5015’E), Nigeria in 2008. The four treatments investigated were 4 t/ha wood ash, 300 kg/ha NPK...
Chicken manure-enhanced soil fertility and productivity: Effects of application rates
May 2010
The utilization of chicken manure as an organic fertilizer is essential in improving soil productivity and crop production. We carried out the study to assess the effects of chicken manure on soil chemical properties and the response of application rate on the yield of spinach (Spinacia oleracea) as well as the uptake of nitrogen and phosphorus nutrients. To quantify these effects, we added chicken manure to samples of...
Optimization of key parameters for chromium (VI) removal from aqueous solutions using activated charcoal
May 2010
Commercial activated charcoal was investigated for removal of Cr(VI) from aqueous solutions. The effects of altering the initial Cr(VI) concentration, pH, contact time and amount of activated charcoal were studied. Maximum adsorption of Cr(VI) was achieved between pH 1 - 3 and after a contact time of 120 min. The percentage of Cr(VI) removed decreased from 99.99 - 90.83% when the initial Cr(VI) concentration was...
The effect of irrigation by domestic waste water on soil properties
March 2010
To investigate the beneficial impacts of domestic waste water on soil properties, we conducted an experiment in the lysimeter by measuring certain features essentially related to soil characteristics. The objectives in this study were (i) the domestic waste water in filtration by soil and (ii) the effect of domestic waste water on soil properties. In this experiment, we had 15 lysimeters that 1...
Soil management strategies for rubber cultivation in an undulating topography of Northern Cross River State
March 2010
This study was conducted to evaluate the soil fertility status of an undulating topography of a young rubber plantation located at Ikot-Ukpora, Biase Local Government Area of Cross Rivers State and its implication for rubber cultivation. The result showed that the soils of the area ranged from loamy sand to sandy loam on the surface overlying a slightly heavier textured sub-soil ranging from sandy loam to sandy clay...
Fractionation profile and mobility pattern of trace metals in sediments of Nomi River, Tokyo, Japan
February 2010
This study provides a geochemical partitioning and mobility pattern of Iron (Fe), Manganese (Mn), Cadmium (Cd), Copper (Cu), Chromium (Cr) and Nickel (Ni) in sediment samples collected from Nomi River, Tokyo, Japan. For the partitioning of particulating trace metals, a widely used 5-step sequential extraction procedure was employed and the concentrations were measured in the liquid extracts by inductively coupled plasma...
Yield and nitrogen accumulation in five cassava varieties and their subsequent effects on soil chemical properties in the forest/savanna transitional agro-ecological zone of Ghana
February 2010
We evaluated five varieties of cassava for yield, N accumulation and their effect on soil chemical properties. Soil phosphorus content increased drastically after 14 months of crop growth while soil organic carbon, N and exchangeable K contents reduced during the same period. Fresh root yield ranged from 17 t ha-1 to 35.9 t ha-1, while total dry matter production also ranged from about 18 t ha-1 to about 25 t...
Reducing compaction effort and incorporating air permeability in Proctor testing for design of urban green spaces on cohesive soils
February 2010
It is well established that compaction negatively affects agronomic productivity, that air permeability is a sensitive measure of the degree of soil compaction and therefore a good indicator of soil productivity impairment from compaction. Cohesive soils in urban settings are often heavily compacted by the common engineering practice to compact sub-grades of urban construction sites to 95% or more of the optimum density...
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