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Sierra Mullins

on 20 February 2013

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Transcript of Soil

Soil Shirley Frye
Monica Chupp
Sierra Mullins
6th Hr Science Pedalfer Pedocal Fun Facts About Pedocal Other Facts About Pedalfer Location of Pedalfer Color of Pedalfer Formation of Pedalfer Uses of Laterite How To Identify Laterite Agriculture Using Laterite Laterite Dried laterite is very hard and practically waterproof. This has been very useful for the people of Southern Asia, they have used laterite to make bricks of their buildings buildings and shrines. These bricks are so hardly, many of these structures are preserved even today. Since laterite forms in tropical areas, the plants that die there decompose very quickly. Due to the roots of living plants absorbing the nutrients released during decomposition of dead plants, laterite cotains little organic matter. This lack of nutrients in the soil makes it nearly impossible to farm on laterite. Laterites orange-red color makes it easy to identify it from other soils. Pedalfer forms in temperate areas that get over 63 centimeters of rain per year. Pedalfer can be found in the eastern half of the United States, particularly in forests. Also known as noncalcareous soil, Pedalfer is neutral to acid. Pedocal is derived from the latin roots "ped" meaning ground and "cal" meaning calcium.

Rainforests are an excellent example of pedocal soils Components of Soil Broken down rock that is non-organic, solid, has a crystalline structure, and unique chemical composition. Organic Matter The organic matter in soil is also known as humus, which is the decayed remains of organisms. Air Air is the source of the carbon dioxide plants use to produce sugar during photosynthesis. Water Soil water provides the moisture needed for chemical reactions that sustain life. It also provides nutrients in a form that plants can use. Mineral Matter Mineral matter ,or broken-down rock; decayed remains of organisms;water;and air Laterite forms in hot, wet climates. This soil is usually deeper than soils that develop in over a similar period in temperate areas due to the intense chemical weathering in such hot climates. The iron oxide and aluminum oxide in the soil gives leterite its distinctive orance-red color. The B horizon in Pedalfers has a lot of iron oxide and aluminum-rich clay which can give it a brown to red-brown color. This soil is found in the drier western United States that have grasses and brush vegetation. Pedocal contains abundant calcite and calcium carbonate, which makes it a light gray-brown color. Soil is the part of the regolith (layer of rock and mineral fragments) that supports the growth of plants. Soil Texture Soil texture refers to the proportins of different particle sizes. Texture affects how well a soil supports life Soil Formation The most important factors in soil formation are parent material, time, climate, organisms, and slope. Soil texture defines the proportions of different particle sizes. Facts Soil texture is classified by the percentages of clay,sand, and silt. Time Organisms Slope Climate Sandy soils dry too quickly, so plants can't get the water they need. Soil Profile The A Horizon The B Horizon The soil is divided into vertical zones known as soil horizons. These layers are split into their zones based on their compostition, texture, structure, and color. The C Horizon The A horizon is also known as topsoil. It mainly consists of organic matter; such as plants, insects, fungi, and microorganisms. The lower section of the A horizon is made up of mineral matter and organic matter. Also known as Regolith. Located between the B Horizon and the parent material, the source of the mineral matter in soil, this layer contains partially weathered parent material. The B horizon, or subsoil, is made of fine clay particles that get washed through the pore space of the A horizon. If enough of this clay builds up, then an impenetrable layer called the hardpan forms. The B horizon is the limit of which burrowing animals and plant roots reach. Wanna hear a dirty joke? sure soil :D ........
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