Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Soil physics"”.
-
Characterization of natural porous media by NMR and MRI techniques : high and low magnetic field studies for estimation of hydraulic properties
Soil is the natural material that covers most of the dry surface of the earth. It is the product of mechanical, chemical and biological interactions of different types of elements. Soils have a very complex composition and high variability in their occurrence and properties. The non-homogeneous …
-
Estimating scale dependence of saturated hydraulic conductivity in soils
… of scale on hydraulic and physical properties of soils has broad applications to scaling problems in hydrogeology, soil physics, and environmental engineering. The scale dependence of flow and transport is attributed to spatial heterogeneities, such as pore-size distribution and pore connectivity …
-
Integrating basic remote sensing, terrain analysis and geostatistical methods to generate spatially explicate continuous soil attribute maps for Fraser Experimental Forest
Hans Jenny's Factors of Soil Formation, a system of quantitative pedology (1941), concisely summarized and illustrated many of the basic principles of pedology utilized to date (Jenny, 1941). This state factor model became the backbone for soil survey research and production because it proposed …
-
Spatiotemporal variability of hydrologic response : an entropy-based approach using a distributed hydrologic model
… dynamics of the hydrologic state variable - the soil moisture field. This thesis uses the distributed hydrologic model MOBIDIC that uses a single soil layer with dual compartments: a capillary and a gravity reservoir composed of small, and large pores, respectively. Mass and energy fluxes are …
-
Solute dispersion in selected tropical soils
… and phosphate was investigated in three tropical soils represented by three Hawaiian soils through a specially designed flow apparatus. Observed differences in the dispersion of these solutes for the range of velocities tested were attributed to differences in ion adsorption capacity and pore …
-
A Comprehensive Investigation on Microscale Properties and Macroscopic Behavior of Natural Expansive Soils
… the complicated behavior of expansive soil requires in-depth exploration of microscopic phenomena under varying situations, especially when the soil stays unsaturated and experiences swell-shrink cycles. This study is dedicated to a comprehensive investigation of eleven micro-scale …
-
Effects of no-tillage and subsoil loosening on soil physical properties and crop performance : a thesis presented in partial fulfilment of the requirements for the degree of Master of Applied Science in Soil Science at Massey University
… production on poorly drained, easily compacted soils. Over the years, conventional cultivation has given rise to degraded soil structure on many farms. No-tillage has been shown to avoid many of these problems but the question remains: "Where soils are compact, what combination of deep tillage …
-
Long-term Residue and Water Management Effects on Soil Respiration and Soil Aggregate Stability in a Wheat-soybean, Double-crop System in Eastern Arkansas
… production from our most naturally fertile soils. Storing carbon (C) in soil as organic matter through sustainable agricultural management practices can both remove atmospheric C and improve soil quality. The objective of this study was to evaluate the long-term effects of water management …
-
The effect of spent mushroom compost on soil conditions and plant growth
… have been reported that evaluate SMC as a soil amendment in New Zealand, and work in other countries has been of limited scope. Therefore the objectives of this study were to: evaluate the effect of SMC on soil chemical and physical properties, and on the yield of three vegetable species; …