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Ch. 37
Plant Nutrition
18
Biology
Undergraduate 1
09/22/2010

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Term
Texture refers to
Definition
... soil's general structure
Term
Composition refers to
Definition
the soil's organic and inorganic chemical components.
Term
Along with climate, what are the two main factors that will determine whether a plant can grow in a certain location?
Definition
Soil Texture and Soil Composition
Term
Also known as the A horizon, this level of soil is a mixture of rock particles, living organisms, and humus
Definition
Topsoil
Term
Humus
Definition
Decomposing organic material formed by bacteria and fungi on dead organisms, feces, and fallen leaves.
Term
Loam
Definition
soil composed of sand, silt, and clay in quasi-even proportions.
Term
Name on type of anion that can be found in soil
Definition
Either one of NO3-, PO4-, or SO4-
Term
Name a cation that can be found in soil
Definition
K+, Ca+, Mg+
Term
Soil particles are generally _______ charged. As such ________ are loosely bound and are easily eroded away.
Definition
negatively charged; anions
Term
Phytoremediation
Definition
Biological technology used to reclaim contaminated areas of land in order to make them fit for planting again.
Term
What makes a nutrient an "essential nutrient" in plants.
Definition
A nutrient is considered essential when the plant cannot complete its life cycle without it.
Term
Hydroponic Plant Culture
Definition
Plants grown in mineral solutions; used to determine which chemicals are essential
Term
deficiency of less mobile nutrients usually affects ...
Definition
.... older organs more than younger ones; the converse is also true
Term
What are Rhizobium bacteria?
Definition
Nitrogen-fixing bacteria than form symbiotic associations with legume plants.
Term
What are the two main types of mycorrhizae?
Definition
Ectomycorrhizae and Endomycorrhizae (Arbuscular mycorrhizae)
Term
Epiphyte
Definition
A plant that nourishes itself but grows on another.
Term
IN this process, mineral cations are displaced from soil particles by other cations, particularly H+, and enter the soil solution for easy absorption by root hairs.
Definition
Cation Exchange
Term
Rhizobium are ...
Definition
nitrogen fixing bacteria that form symbiotic relationships with plant roots and help them absorb nitrogen from the soil in NO3- and NH4-
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