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Soil Science Introduction
This note covers the following topics: Soil Physical Properties, Soil-water potential- concepts and measurement, Saturated water flow, Water flow in unsaturated soils, Field soil water regime, Solute movement, Gas flow, Heat transfer, Spatial and temporal variability of soil physical properties.
Author(s): UC Davis
NA Pages 
The Formation of Vegetable Mould Through the Action of Worms
This note explains the following topics: Habits Of Worms, The Amount Of Fine Earth Brought Up By Worms To The Surface, The Part Which Worms Have Played In The Burial Of Ancient Buildings, The Action Of Worms In The Denudation Of The Land, The Denudation Of The Land.
Author(s): Charles Darwin
NA Pages
In the first section of this book on soil erosion, an introduction to the soil erosion problem is presented. In the first part of the second section, rainfall erosivity is estimated on the basis of pluviograph records and cumulative rainfall depths by means of empirical equations and machine learning methods. In the second part of the second section, a physically-based, hydrodynamic, finite element model is described for the computation of surface runoff and channel flows.
Author(s): Vlassios Hrissanthou
NA Pages
Soil Fertility book presents nine chapters written by renowned soil fertility experts from Africa, Asia and South America. The book is divided into two sections. Section 1, Biological Processes and Integration of Inorganic and Organic Fertilizers for Soil Fertility Improvement, examines biological processes that can enhance the soil fertility. The second section, Improving Fertilizer Recommendation and Efficiency, looks at the state-of-the-art in leaf sampling and analysis.
Author(s): Roland Nuhu Issaka
NA Pages
This class presents the application of principles of soil mechanics. It considers the following topics: the origin and nature of soils; soil classification; the effective stress principle; hydraulic conductivity; stress-strain-strength behavior of cohesionless and cohesive soils and application to lateral earth stresses; bearing capacity and slope stability; consolidation theory and settlement analysis; and laboratory and field methods for evaluation of soil properties in design practice.
Author(s): Prof. Charles Ladd and Dr. Lucy C. Jen
NA Pages