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APES- SOIL Flashcards

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7792769318Soil:natural resource -its own ecosystem0
7797136850Soil formationTime Climate Parent Material Topography/ Relief Organisms1
7797202166Timecreation of soil2
7797204442Climatetemp/ precipitation3
7797204443Parent Materialancient layers4
7797207332Topography/ Reliefshape of land surface5
7797207333Organismsall living organisms that live in soil EX: bacteria Fungi Plants Animals6
7797209885Weatheringwear away or change the appearance or texture of (something) by long exposure to the air. 3 types: Physical/ Mechanical Chemical Biological7
7797319968Chemical WeatheringOxidation Hydrolysis Carbonation8
7797722696Hydrolysisthe chemical breakdown of a compound due to reaction with water.9
7797319969Biological WeatheringLiving organisms releasing chemicals to break down rock10
7797213811Characteristics of SoilTexture Porosity Permeability Water Holding Capacity Compaction11
7797213812Textureminerals separate from each other12
7797216345PorosityAIR SPACE between particles of soil13
7797216346Permeabilityability for WATER to FLOW through14
7797219911Water Holding Capacitydetermines the moisture of the soil15
7797219912CompactionREDUCTION of PORE SPACE16
7797222098ClayParticle (dm): <0.002 Porosity: Low Permeability: Low Moisture Capacity: High Compaction: High17
7797222099SiltParticle (dm): 0.002 - 0.005 Porosity: Medium Permeability: Medium Moisture Capacity: Medium Compaction: Medium18
7797222100SandParticle (dm): 0.005 - 2.0 Porosity: High Permeability: High Moisture Capacity: Low Compaction: Low19
7797222101LoamIDEAL for PLANT GROWTH20
7797227402FertiltyOrganic side of soil samples21
7797390848MacronutrientsNitrogen Phosphorus POTASH22
7797227403Organic SoilMature Crop residues ^Gained through decomposition23
7797229375Inorganic Soileasy to obtain readily available24
7797229376Arabilityland to be used for farming aggregate (clump) to have pores fertile and workable soil25
7797234356pHmeasure of acidity range between 0-14 6: slightly acidic 8: slightly alkaline pH affects the solubility of nutrients26
7797237398Salinitymeasure of salt in soil good soil= low salinity27
7797239055Soil ProfileHorizon 0 Horizon A Horizon B Horizon C Horizon R28
7797250531Horizon OOrganic Litter29
7797250532Horizon ATop Soil Zone of Eluvialation30
7797445095Zone of EluviationThe process of washing down material such as organic matter or minerals through the soil.31
7797252284Horizon BSubsoil (lots of nutrients) Zone of Illuviation32
7797452191Zone of IlluviationIlluviation - The deposition in a soil horizon of minerals, humus and other materials.33
7797707893Humusthe organic component of soil, formed by the decomposition of leaves and other plant material by soil microorganisms.34
7797254722Horizon CNO ORGANIC MATERIAL35
7797257138Horizon RBedrock -unweathered36
7797260619Major Biome SoilsGrassland Soil Forest Soil Desert Soil37
7797260620Grassland Soildeep Horizon A Trees NOT common38
7797262150Forest SoilHigher rainfall- high leeching giving structure for large roots39
7797265517Desert Soilpoorly developed soil40
7797265518Leechingcomponents removed from horizon due to percolation41
7797265519Erosionmovement away from water and wind42
7797643320Soil Conservation PracticesTerracing Contour Planting/ Strip Cropping Alley Cropping Windbreaks These practices return organic material to the soil, slow down the effect of wind, and reduce the amount of damage done to the soil by tillage (plowing).43
10049182109Terracingmake or form (sloping land) into a number of level flat areas resembling a series of steps.44
10049182110Contour Planting/ Strip Croppingthe practice of tilling sloped land along lines of consistent elevation in order to conserve rainwater and to reduce soil losses from surface erosion.45
10049184836Alley Croppingis planting rows of trees at wide spacings with a companion crop grown in the alleyways between the rows.46
10049184837Windbreaksa thing, such as a row of trees or a fence, wall, or screen, that provides shelter or protection from the wind.47
7797268044Conservation LawsSoil & Water Conservation Act 1977 Food Security Act 1985 Soil Erosion Act 193548
7797271104Soil & Water Conservation Act 1977Programs to aid landowners and users by setting up conditions to continue evaluating the condition of US soil, water, and related resources49
7797271105Food Security Act 1985"swamp buster" that discouraged the conversion of wetlands to non-wetland by rewarded returning land to wetland & removing federal farm supplements to those that converted wetland to agricultural lands50
7797273788Soil Erosion Act 1935mandates the protection of the nation's soil, established the Soil Conservation Service, deals with soil erosion problems, carries out soil surveys, does research on soil salinity, and provides computer databases for research.51

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