fuuuuuu
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| LEO says GER | Loss of Electron is Oxidation
Gain of Electron is Reduction
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| sources of nitrogen (5) | biological fixation (organisms), decomposition of N by precipitation, fertilizer, plant residues (organisms), manure (organisms)
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| losses of soil Nitrogen (5) | plant removal, leaching, gaseous losses, erosion (wind and water), ammonium fixation
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| Mineralization is: | the conversion of organic nitrogen to inorganic nitrogen
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| immobilization | converting inorganic N to organic N
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| Soil fertility is: | the study of soils' availability to supply nutrients for plant growth
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| what does Phosphorous do for plants? (4) | photosynthesis, crop maturation, root development, strengthening cell walls in grasses
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| importance of Sulfur to plants? (3) | protein synthesis, photosynthesis, strengthening cell walls
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| importance of Potassium for plants? (5) | activator of plant enzymes; photosynthesis; protein synthesis; starch formation; improves drought tolerance (by lowering osmotic water potentials)
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| Pedology is.... | the science that deals with formation, morphology, and classification as landscape components
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| Weathering: | refers to teh breakdown and changes in rocks at or near the EArth's surface produced by biological, chemical, and physical agents or combinations of them
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| Crystallization induces | disintegration
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| thermal processes induce | volume change
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| wetting and drying change | grain-size
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| hydration induces | decompaction
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| hydrolysis induces | recombination
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| oxidation induces | leaching
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| carbonation induces | dissolved ions
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| growth induces | accumulation
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| decomposition induces | mineralization
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| burrowing induces | pulverization
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| lichens can cause biochemical changes that enhance | nutrient uptake
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| soil formation equation: | S = f(cl, b, r, p, t)
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| 5 factors of soil formation | climate; biota; parent material; topography; time
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| Eluviation is the process of ____ and results in an ____ horizon | removing soil material; Ae
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| Accumulation of organic matter results in an _____ horizon | Ah
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| Technical classifications are | developed for a specific purpose
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| Natural classifications are | based on "natural" groupings of soils (ex. Canadian system)
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| A horizon | near soil surface; eluviation; accumulation of OM
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| B horizon | illuviation; clay; iron and aluminum oxides
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| C horizon | limited (or no) alteration thru soil-forming processes operative in the A and B horizons
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| Well drained sites produce which 3 horizons? | L; F and H
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| L | accumulation of undecomposed residues
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| F | accumulation of partially decomposed residues
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| H | accumulation of decomposed matter
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| poorly drained horizons? | Of; Om; Oh
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| Of (fibric) | high in undecomposed fibrous material
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| Om (mesic) | intermediately decomposed fibrous material
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| Oh (humic) | dominated by well decomposed organic residues (fibrous material)
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| Ah | organic matter
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| Ae | eluvial
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| Ap | mechanically disturbed (plough)
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| Ahe | organic matter/eluviated
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| Aej | thin eluvial horizon
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| Bt | clay
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| Bf | Fe/Al oxides
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| Bh | organic matter
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| Bm | modified by hydrolysis, oxidation or solution. possesses different color
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| Bg | gleyed. grey color and/or mottles
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| Bca | enriched secondary carbonates
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| Bmk | slight development of Ca-carbonates
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| Bn | presence of high % of Na ions
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| Ck | Ca-carbonates
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| Cs | soluble salts
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| Cy | horizon affected by cryoturbation
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| what's cryoturbation? | frost action
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| Cz | perennially frozen horizon
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| Cg | gleyed horizon; grey golor, mottles
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| erosion control practices | increased veg cover; increased OM; surface roughness
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