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Soil Nutrient Management
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 
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
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 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
Status of the Worlds Soil Resources
Goal of this guide is to make clear these essential connections between human well-being and the soil, and to provide a benchmark against which our collective progress to conserve this essential resource can be measured.
Author(s): Intergovernmental Technical Panel on Soils, Food and Agriculture Organization of the United Nations
648 Pages
This volume is designed to be a complete manual for all but amateur cultivators. The object of this volume is to condense, and present in an intelligible form, all important established facts in the science of soil-culture. The author claims originality, as to the discovery of facts and principles, in but few cases.
Author(s): J. H. Walden
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
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