scholarly journals Nitrogen Requirements of Amaranthus cruentus L. on Two Soil Types in Lagos State of Nigeria

2013 ◽  
Vol 3 (1) ◽  
pp. 034-038
Author(s):  
E.A. Makinde ◽  
Keyword(s):  
Soil Types ◽  
Amaranthus Cruentus ◽  
Lagos State

Abrasive wear of polymer/steel gear drives

2008 ◽  
Vol 4 (1) ◽  
pp. 1-26
Author(s):  
Gábor Kalácska
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Material Selection ◽  
Solid Particles ◽  
Soil Types ◽  
General View ◽  
Modern Engineering ◽  
Clean Environment ◽  
Engineering Polymers ◽  
Plastic Gears

Research was performed on the friction, wear and efficiency of plastic gears made of modern engineering polymers and their composites both in a clean environment (adhesive sliding surfaces) and in an environment contaminated with solid particles and dust (abrasive), with no lubrication at all. The purpose is to give a general view about the results of abrasive wear tests including seven soil types as abrasive media. At the first stage of the research silicious sand was applied between the meshing gears and the wear of plastic and steel gears was evaluated and analyzed from the point of different material properties (elongation at break, hardness, yield stress, modulus of elasticity) and its combinations. The different correlations between the experienced wear and material features are also introduced. At the second stage of the project the abrasive sand was replaced with different physical soil types. The abrasive wear of gears is plotted in the function of soil types. The results highlight on the considerable role of physical soil types on abrasive wear resistance and the conclusions contain the detailed wear resistance. The results offer a new tribology database for the operation and maintenance of agricultural machines with the opportunity of a better material selection according to the dominant soil type. This can finally result longer lifetime and higher reliability of wearing plastic/steel parts.

Effects of heavy metals on soil invertase enzyme activity in different soil types

2010 ◽  
Vol 18 (2) ◽  
pp. 175-180
Author(s):  
Rajesh K. Verma ◽  
Dharam Veer Yadav ◽  
Chandra Pal Singh ◽  
Archna Suman ◽  
Asha Gaur
Keyword(s):  
Heavy Metals ◽  
Enzyme Activity ◽  
Soil Types

Status of Food Security in Banten Province, Indonesia

2019 ◽  
Author(s):  
Weksi Budiaji
Keyword(s):  
Population Dynamics ◽  
Food Security ◽  
Arable Land ◽  
Secondary Data ◽  
Disaster Risk ◽  
Soil Types ◽  
Indicator Variables ◽  
Cereal Production ◽  
The Status ◽  
Vast Area

This paper discusses the status of food security in Banten Province, Indonesia based on regional and city characteristics. Secondary data is used and is analyzed descriptively covering population dynamics, the population living in poverty, cereal production, disaster risk and soil types. Tangerang Region is found to have the largest population with the greatest number of people living in poverty among the regions and cities in Banten Province. Cereal production is dominated by the regions rather than the cities due to their vast area. Regarding arable land, flooding is the most threatening disaster in the major rice producing areas. In order to identify the distributions of regions and cities regarding food security, three indicator variables of food security dimensions are plotted, namely, cereal normative consumption, proportion of the population living in poverty, and proportion of malnourished babies. The three regions of Pandeglang Region, Lebak Region and Serang Region are grouped together in a less secure group.

Population Growth and Waste Management in Metropolitan Lagos

2013 ◽  
Vol 11 (2) ◽  
Author(s):  
Femi O. Omololu ◽  
Akinmayowa S. Lawal
Keyword(s):  
Waste Management ◽  
Population Growth ◽  
Management Practices ◽  
Public Private Partnership ◽  
Household Waste ◽  
Waste Generation ◽  
Private Partnership ◽  
The Public ◽  
Lagos State ◽  
Waste Management Practices

This paper examines the influence of population growth on waste generation in Lagos metropolis, African’s most populous urban conglomeration. Using both quantitative and qualitative methods, the study analyses the pattern of household waste disposal, collection and transportation in Lagos State. It also examines the public-private partnership strategy adopted in waste management. The findings show that population growth significantly influences waste generation and management in Lagos metropolis. As the population increased, the volume of waste generated also increased in each LGA of Lagos State. The public-private partnership strategy has been effective in managing waste, but the Lagos State Waste Management Authority oversight was adjudged as less than satisfactory. The paper concludes that intervention is needed in terms of educating the growing population of the Lagos metropolis on the best waste management practices. It highlights the need for a more efficient and effective publicprivate partnership collaboration to solve this perennial social problem.

Sign in / Sign up

Export Citation Format

Share Document