Soil is composed of layers of raw material middles and organic matter a combination capable of supporting the growth of rooted plants. Soil scientists classify soil into twelve different orders distinguished by the physical form of chemical, and biological characteristics. Within each order, there are many cell types. In the United States alone, there are more than 20,000 different types
The slow continuous physical and chemical breakdown of rocks and middle began the process of making soil along with the decomposition of organic matter and the incorporation of matter and air knew like the type of parent rock affect the overall chemical composition I’m texture of cell, for example, limestone creates soil rich in calcium while share develops a smooth clay soil that resists penetration by water and air.
The rate at which oil is from depends upon the environment less than an inch of soil may form during a century in a desert whereas almost half an inch can form annually in humid tropics
Where do earthworms help the soil for some 7000 hours one species live at all soil did in most temperature and many tropical environments they dominate the soils invertebrate trailing they borrowed true soil aerate Increases its porosity city and make channels for plant roots the help turned rocks to the side. Their biggest contribution however is their waste called castings warm casting form a major organic component of soil and increases fertility abundantly
Layers of soil layers called horizon’s different compositions and depths and are defined according to location the soil profile shown here represents clay soil come common in parts of southern Southeastern United States
Horizon O -Up to 1 inch thick decomposing materials such as leaf litter and humans on this way to becoming topsoil
Horizon A- 6 to 8 inches thick the dark topsoil contain organic material and animal ranging from microscopic bacteria to worms and brewing shrews
Horizon E - A few inches thick lighter in colour than horizon a as a result of middle leaching downwards
Horizon B - 1.5 to 2 feet thick hi Irene contain turns this layer red also called subsoil
Horizon C - Soil is born here where water and temperature joined to break bedrock volcanic ash or sediment down into small particles little organic material is found here
Horizon R - solid bedrock unweathered beneath the other layer
Why organic?
Adding biological material such as manure composed of grass straw and crop residue to agricultural land improves soil structure and nourishes soil life which in turn nourishes plant chemical fertilizer, by contrast, feeds the plants directly and does not benefit the soil overtime
Organic gardening is a usual practise followed by farmers around the world such as these in China one province
Adding biological material such as manure composed of grass straw and crop residue to agricultural land improves soil structure and nourishes soil life which in turn nourishes plant chemical fertilizer, by contrast, feeds the plants directly and does not benefit the soil overtime
Adding biological material such as manure composed of grass straw and crop residue to agricultural land improves soil structure and nourishes soil life which in turn nourishes plant chemical fertilizer, by contrast, feeds the plants directly and does not benefit the soil overtime
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