200 300 400 500 100 200 300300300 400 500 Organisms NN TransOrganic Matter Soil Taxonomy.

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200 200 200 200

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OrganismsN N TransOrganic MatterSoil

Taxonomy

N - 100

• Transformation of organic N to inorganic N.

Mineralization

N- 200

• Leaching, volatilization, denitrification, immobilization

N losses

N - 300

• Gaseous loss of N under high moisture situations in the presence of a C source

Denitrification

N- 400

• Stable compost releases N through this process

Mineralization

N - 500

• Recalcitrant compounds of high molecular weight resulting from the breakdown of plant residues and the microbial biomass

Humus

Taxonomy - 100

• The great group Haplaquolls belongs to this soil order.

Mollisols!!! And you

Better know this one

Taxonomy - 200

• The great group Hapludoll belongs to this soil order, soil moisture regime, and will support this major crop.

Mollisols, udic, corn

Taxonomy - 300

• When comparing these two soil subgroups, which one is the “wettest?”

• Typic Haplaquolls• Aquic Hapludolls

Typic Haplaquolls

Taxonomy- 400

• Place the following three soils in correct order from high to low elevation in a soil toposequence.

• Clarion—Typic Hapludolls• Webster—Typic Haplaquolls• Nicollet—Aquic Hapludolls

Clarion, Nicollet, Webster

Taxonomy - 500• Place the following three soils in correct order from high to low elevation in a soil toposequence.• Clarion—Typic Hapludolls• Markey—Typic Borosaprists• Webster—Typic Haplaquolls• Nicollet—Aquic Hapludolls

Clarion, Nicollet, Webster, Markey

Organic Matter - 100

• Tillage causes the loss of this compound

Carbon dioxide—CO2

Organic Matter - 200

• Catalyse reactions but are not consumed by the reactions.

Chroma

•Enzymes

Organic Matter - 300

• An aerobic process whereby C:N ratios decrease through microbial degradation

Composting

Organic Matter - 400

• Filamentous organism that attach to plant roots thereby providing increased root mass and nutrient uptake

Mycorrhizal fungi

Organic Matter- 500

• a C:N ratio common in soil

10:1

N Transformations - 100

• N loss as nitrate out of the bottom of the root zone

Leaching

N Transformations - 200

• N loss resulting from surface application of urea

Volatilization

N Transformations . - 300

• Transformation of inorganic N to organic N

Immobilization

N Transformations . - 400

• Process by which most of the N fertilizer is made

Haber Bosch

N Transformations . - 500

• N losses from surface applied poultry litter

Volatilization

Organisms – 100

Prokaryotes

• Organisms whose DNA is not found within a membrane bound nucleus

Organisms – 200

Lichen

• This organism is a symbiotic relationship between an alga and a fungus

Organisms – 300

Heterotrophs

• Derive energy from preformed C compounds

Organisms – 400

Autotrophs

• Derive energy from carbon dioxide

Organisms – 500

Fungi

• Are filamentous organisms important to degradation of cellulose and lignin