Soil Texture Is Determined By The Relative Amounts Of 3 Groups Of Soil Particles

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soil texture is determined by the relative amounts of 3 groups of soil particles

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sand,silt,clay

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soil gives plants the following which are essentioal to sustain plant life

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support nutrients and water(snw)

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water is retained in or moves through the pore spaces as a result of

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the size, number and continuity of the pores, textural, structural, and organic matter

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organic

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living or once was living

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a given volume of soil contains 4 parts

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organic matter
living matter
water
air

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Physically describes soil by the feel

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texture

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course soil

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larger amount of sand

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texture of flour

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silt

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loam

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mearly equal amounts of sand, silt, and clay

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microscope must be used to see

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silt

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electron microscope must be used to see

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clay particles

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a lab procedure used to find proportions of soil seperates in a soil is called

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mechanical analysis

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textural triangle used to

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determine soil texture after mechanical analysis

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3 sides of the triangle represent the

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% of sand, silt, and clay

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intersection on triangle points to of the 3 lines from each side of the triangle determine how

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the soi texture will be classified

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the arrangement of soil seperates or individual soil particles in units

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soil structure

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(individual soil particles)into units

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soil aggregates

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process that causes aggregates

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welting, drying periods, freezing/thawing, decaying, organic matter, activity of roots and small animals, absorbed nurtients, soil tillage(wdpftdoma(of)r(and)saanst)

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bulk density

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how soil retains water, the weight per unit volume of soil

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the volume includes both

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solids and pore space

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bulk density used in determing

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soil porosity

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lose porous soils have

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lower bulk density than tight compacted soil.

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tight compacted soil has

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bulk density that increase with compaction

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bulk density indicates(4)

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how easy soil will till, how easily water will infilarate, how it will hold water, and its suitability for growing plants

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space between soil particle is_________and consists of__________

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1) the pore space
2)consists of varying amounts of water and air

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soil poristy depends on

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soil texture and structure

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the characteristics causes

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bulk density to be lighter for sands