what do you mean by soil?
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Soil is the loose surface material that covers most land. It consists of inorganic particles and organic matter. Soil provides the structural support to plants used in agriculture and is also their source of water and nutrients. Soils vary greatly in their chemical and physical properties soil is formed by rocks present on the earth . soil is also divided into types :-
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WHAT IS SOIL ?
Soil is the loose surface material that covers most land. It consists of inorganic particles and organic matter. Soil provides the structural support to plants used in agriculture and is also their source of water and nutrients. Soils vary greatly in their chemical and physical properties.
WHAT ARE THE TYPES OF SOIL ?
Clay Soil
Sandy Soil
Silty Soil
Peaty Soil
Chalky Soil
Loamy Soil
WHAT ARE THE 6 HORIZON SOILS ?
Soils typically have six horizons. From the top down, they are Horizon O,A, E, B, C and R. Each horizon has certain characteristics. O Horizon The top, organic layer of soil, made up mostly of leaf litter and humus (decomposed organic matter).
WHAT ARE THE 4 MAIN HORIZONS ?
Soils are named and classified based on their horizons. The soil profile has four distinct layers: 1) O horizon; 2) A horizon; 3) B horizon, or subsoil; and 4) C horizon, or soil base (Figure 31.2. 2). The O horizon has freshly decomposing organic matter—humus—at its surface, with decomposed vegetation at its base.
WHAT IS MEANT BY THE LIQUEFACTION
OF SOIL ?
Liquefaction is a phenomenon in which the strength and stiffness of a soil is reduced by earthquake shaking or other rapid loading. Liquefaction and related phenomena have been responsible for tremendous amounts of damage in historical earthquakes around the world.
WHAT IS SOIL POLLUTION ?
Definition. Soil pollution is defined as the presence of toxic chemicals (pollutants or contaminants) in soil, in high enough concentrations to pose a risk to human health and/or the ecosystem.
WHAT IS THE BEST SOIL FOR PLANTS ?
The ideal blend of soil for plant growth is called loam. Often referred to as topsoil or black dirt by landscape companies, loam is a mixture of sand, clay, and silt. The estimated mixture is 40% sand – 40% silt – 20% clay.
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