An Introduction to Soils

Abstract

Soil is a dynamic and complex substance composed of mineral particles, organic matter, microflora and microfauna, and pore spaces that contain air, water and dissolved nutrients. Although soils vary widely due to differences in climate, parent materials, vegetation, relief and time, certain physical and chemical characteristics are common to all soils. Arborists should have a basic understanding of these characteristics in order to properly maintain trees and shrubs.