AeroBiology Agriculture BioTechnology Parasitology BioMechanics Plant Biology Structural Biology AstroBiology BioEngineering Botany Virology Mycology Evolutionary Biology Soil Biology BioInformatics BioGeography Cell Biology Plant Pathology BioMedical Research Ornithology Developmental Biology Zoology Entomology Molecular Biology Mammalogy Bacteriology Cytology Ecology
Advanced Soil Mechanics
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 
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
The purpose of this web resource is to provide fundamental concepts for managing nutrients in tropical soils and container crop production. Topics covered includes: Soil composition, Soil profile Factors that cause differences in soil behavior and performance, Goals of Modern Nutrient Management, Soil-Nutrient Relationships, Soil Acidity and Liming, Essential Nutrients, Soil Fertility Evaluation, Fertilizer Material, Fertilizer Placement.
Author(s): The University of Hawai
NA Pages
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
Land Degradation and Desertification
This book is organized into two sections. The first section covers three major aspects, viz., an understanding of patterns of land degradation and desertification for developing mitigation strategies, land-atmosphere interaction from response of land cover to climate change effects of Karst rocky desertification. The last section dwells on the relationship between soil degradation and crop production and an examination on how land degradation impacts the quality of soil in communal rangelands.
Author(s): Abiud Kaswamila
NA Pages
The book is intended to help children to study nature. This book covers the following topics: What is the soil made of, more about the clay, what lime does to clay, some experiments with the sand, the plant food in the soil, the dwellers in the soil, the soil and the plant, cultivation and tillage, the soil and the countryside, how soil has been made.
Author(s): E. J. Russell
NA Pages