Test 4 Flashcards by Megan Baker

Q

Ph indicate?

A

Quantity of h+ ions

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Q

Ph indicate?

A

Acidity of the soil

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Q

Ph of 3 vs ph of 5

A

100

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Q

Chemical equation of neutralization

A

Acid + base = salt + h2o

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Q

Sources of acids

A

Acid rain
Om
Fertilizer

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Q

Low ph causes?

A

Alteration of nutrient to cause them to become unavailable

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Q

Micronutrients

A

Copper

Iron

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Q

Low ph effect microorganisms

A

Less activity

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Q

Lime

A

Reduces soil acidity

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Q

Lime reduces ph by

A

Oh- bonds with h+ to neutralize

Calcium removes h+ from CEC

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Q

Soil over liming =

A

Soil structure collapse

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Q

Liming materials

A

Calcium carbonate
Dolomite
Calcium hydroxide
Calcium oxide-best

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Q

Lime effectiveness

A

Purity

Finess

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Q

Reduce effect w/o changing ph

A

Ph tolerant plants

Add gypsome

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Q

Om helps?

A

Whc

CEC

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Q

Reside composed of?

A

Carbohydrates

Ligdons

Q

Om decomposition process? Carbon

A

Co2 increase

**

Q

Low aeration effect on decomposition?

A

Slows process

Q

C/n connected?

A

Microns need nitrogen to consume carbon

Q

Groups of c/n

A

10: 1 decomposed
20: 1 fast
30: 1 get from soil

Q

Humus

A

Om resistant to decomposition

Q

Benefit of om

A

Adds nutrient to soil

Q

Not want om?

A

Cost

Allopasity

Q

Agroecosystem to global ecosystem?

A

Total om is declining

Q

N do plant prefer

A

No3 best

No2

Q

N for plants sources?

A

Climatic

Synthetic fertilizers

Q

N conversion in biological fixation

A

N2 to NO3

Q

Bf sources of n

A

Soil

Q

Free living organisms

A

Blue green algie

Q

N in inorganic form?

A

2-5%

Q

What is mineralization?

A

Conversion of organic n to mineral n

Q

Nitrification

A

Nh3-no2-no3

Q

Causes change in inorganic n?

A

Micron activity

Q

Sulfur function

A

Photosynthesis

Q

Sulfur use and chemical form

A

Leaves- so2

Roots- so4-