Soil degradation refers to the decline in quantity and quality of soil. Degradation of soil is done by erosion (wind and water)‚ biological degradation‚ physical degradation (referring to the over loss of structure and changes in permeability) and chemical degradation‚ this refers to acidification‚ declining fertility‚ changes in pH levels‚ salinization and chemical toxicity. Soil degradation affects not only the environment but also the economy as well as people. The effect that soil degradation
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The soil used in this experiment is Kaolinite clay‚ which has Cv = 8.69 sqm/year at 300 kPa (hydraulic result) and Cv = 2.98 sqm/year at 288 kPa (manual result). This result then would be compare with some theoretical calculation by using the isochorne plot. Introduction Oedometer test is test to present and measure the consolidation of a soil. Consolidation is a process when an external load is given at the top of a saturated soil which will cause the water to be squeezed from the soil and
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Recommended Methods for Determining Soil Cation Exchange Capacity Donald S. Ross and Quirine Ketterings The cation exchange capacity (CEC) of a soil is a measure of the quantity of negatively charged sites on soil surfaces that can retain positively charged ions (cations) such as calcium (Ca2+)‚ magnesium (Mg2+)‚ and potassium (K+)‚ by electrostatic forces. Cations retained electrostatically are easily exchangeable with cations in the soil solution so a soil with a higher CEC has a greater capacity
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FIELD AND LABORATORY TESTS 8 6. SAFE BEARING CAPACITY 9 7. CONCLUSIONS AND RECCOMENDATIONS 10 1. Abstract: The appropriate scope of a geotechnical investigation is a function of the type of proposed land use or project‚ the soil/ geologic conditions of the project site‚ and type of permit or approval sought. The geotechnical consultant is responsible for targeting the scope of their investigation‚ testing‚ analyses‚ and documentation to balance these factors. References are
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Dispersive Soils Group Members: 1. Elsie Phelane 2. Keeme Sephikwe 3. Lawrance Mabasa 4. Lethlogonolo kotsedi DISPERSIVE SOILS INTRODUCTION Dispersive soils are associated with residual granites‚ granodiorites‚ mudstone and sandstone as well as fine-grained transported soils such as alluvium deposits. Dispersitivity is found in clay‚ silty and sandy soil. Dispersible soils tend to be highly erodible and present problems for successfully managing earth works. It is an indicator of sodic soils as
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The transfer of trace elements between soil and plant is part of chemical element cycling in the nature. The mobility and availability of trace elements are controlled by many factor of Climatic‚ biological and geochemical origins in nature. That means‚ to predict the uptake of trace elements by plants from soil it is important to look at several biotic and abiotic parameters the affect and control the behavior of elements in the soil. The risk to environment and human health of a given trace metals
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LABORATORY EVALUATION OF SOIL MOISTURE USING MICROWAVE TECHNIQUES 1K .Prasanth ‚ 2K .Shashank ‚ 3M .Ashok ‚ 4M . AV H Krishna ‚ 5Zachariah C Alex 1B.TECH (ECE)‚VIT University‚Vellore‚2B.TECH(ECE)‚VIT University ‚Vellore‚ 3B.TECH (ECE)‚VIT University‚Vellore‚4B.TECH(ECE)‚VIT University ‚Vellore‚ 5Senior professor‚ VIT University‚ Vellore. ABSTRACT Microwave techniques can be used to measure soil moisture content‚ mineral content and fertility of the soils. A microwave set up is designed
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The Economics of Soil Erosion: Theory‚ Methodology and Examples 5/15/03 1:23 PM Special Papers The Economics of Soil Erosion: Theory‚ Methodology and Examples by Edward B. Barbier Paper based on a presentation to the Fifth Biannual Workshop on Economy and Environment in Southeast Asia (Singapore‚ November 28-30‚ 1995) Edward B. Barbier Dept of Environmental Economics and Environmental Management University of York‚ Heslington‚ York YO1 5DD‚ UK 1. Introduction Soil is an essential input
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2.7 Farmers’ perception of soil erosion Perception‚ according to Lewin (1951)‚ one of the foremost authors in the behavioral studies‚ is a behavioral product of individual life space or what he also calls the psychological environment. To‚ Cox (1972)‚ perception is a “pieces of knowledge‚ which are acquired by the individual as a result of his visual‚ tactile‚ verbal and auditory contacts with the environment about him”. It is the stimulus/response aspect of the process of decision-making with the
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CHARACTERISTICS AND CEMENTING SUBSTANCES OF SOIL AGGREGATES ON SOILS DERIVED FROM COASTAL PLAIN SANDS IN AKWA IBOM STATE A RESEARCH PROJECT BY JOHN‚ ANYANIME ANIEDI 05/AG/SS/155 TO DEPARTMENT OF SOIL SCIENCE FACULTY OF AGRICULTURE UNIVERSITY OF UYO‚ UYO IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF B. AGRIC DEGREE (SOIL SCIENCE) FEBRUARY‚ 2012 CERTIFICATION This is to certify that this work was carried out by John‚ Anyanime Aniedi in the Department of soil Science‚ University of Uyo‚ Uyo
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