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14 Cards in this Set
- Front
- Back
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ions
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electrically charged atom or group of atoms
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acidity
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concentration of Hydrogen ions
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pH
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measure of acidity or alkalinity
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Soils
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layer of chemically and biologically altered materials that overlies rocks or other unaltered matieral at earths surface
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water potential
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strength of attractive forces holdign water in soil or cell,
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matric potential
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water potential generated by attraction of water to surfaces of soil particles
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field capacity
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amt of water soil can hodl against pull of gravityat matric pot. less that -0.01 MPa
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wilting coefficient/wilting point
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minimum water potential of soil at which plants obtain water
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solutes
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substance dissolved in solvent
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osmosis
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tendency of water move from low to high solute conc.
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root pressure
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pressure created when osmotic pessure in roots of plants draws water from soil into plants, forces water into xylem
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transpiration
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evaporation of water from leaf cells
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cohesion-tension theory
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idea that force required to draw water from soil to roots to leaves generated by transpiration
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stomates
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opening in surface of leaf
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