Soil and Fertilization Soil is the superficial covering of most of the earth’s land area. This soil is made up of minerals and organic particles produced by organic decay. The main components of soil are undissolved inorganic compounds, soluble nutrients, organic matter, water, and gases. The physical nature of soil is determined by the proportions of different sizes. Inorganic particles range from large particles such as stone and gravel, to smaller particles. The smaller …showed first 75 words of 352 total…

…showed last 75 words of 352 total…sticky mass. Soils are organized into different classes based on their general characteristics. The main soil classification system that is used is based on the form, composition, and structure of the soil, and deals with more specific characteristics such as depth, color, form, structure, and composition of soil. Most soils have characteristic layers. The nature, number, thickness, and arrangement of these layers are also important in the classification and identification of different types of soils.