In order to understand how your soils behave, it is important to understand how your soil fits together and what it is made up of. Soil structure refers to the size and make up of the soil particles and clumps.
In order for soils to be porous and provide a good medium for plant roots to grow and get the nutrients that the plants need, the structure has to allow for an even distribution of the air, water and mineral particles and soil organic matter (which provides the glue that sticks soil particles together) through the depth of the soil.
Clay particles, organic matter and in some cases the presence of calcium and iron compounds help to bind the soil together into structural units.
Soils can restructure due to cultivation, natural fracturing processes when clay shrinks and biological activity.
Soil texture will determine how you manage your soil structure and also what the risk factors are, however understanding your soil and how it works is the crucial first step to excellent soil management.