Nitrogen Flashcards

1
Q

Nitrogen is an essential for plant (3)

A

Growth

Development

Reproduction

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2
Q

Most common deficiency in plants

A

Nitrogen

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3
Q

Nitrogen from (2) is not directly available to plants

A

Atmosphere

Earth’s crust

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4
Q

Healthy plants contain (2) (range) percent nitrogen in above ground tissue

A

3-4

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5
Q

Nitrogen concentration is much higher compared to

A

Other nutrients

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6
Q

Only nutrients that present higher concentration than nitrogen (3)

A

Carbon

Hydrogen

Oxygen

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7
Q

Hydrogen, oxygen, carbon don’t _

A

Play a significant role in most soil fertility programs

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8
Q

Nitrogen is a major component in

A

Chlorophyll

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9
Q

Chlorophyll is the compound by which plants

A

Use sunlight energies to produce sugars from water and carbon dioxide (photosynthesis)

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10
Q

Nitrogen is also a major component of

A

Amino acids

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11
Q

Amino acids are

A

The building blocks of protein

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12
Q

Without proteins, plants

A

Wither and die

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13
Q

Some proteins act as _ in plant cells

A

Structural units

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14
Q

Some proteins act as

A

Enzymes

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15
Q

Enzyme proteins make possible

A

Many of the biochemical reactions in which life is based

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16
Q

Nitrogen is essential for crops to achieve

A

Optimum yields

17
Q

Nitrogen increases _ content of plants directly

A

Protein

18
Q

Soil nitrogen exists in _ general forms

A

3

19
Q

1st form of soil nitrogen (organic)

A

Organic nitrogen compounds

20
Q

Second form of soil nitrogen (am)

A

Ammonium ions

21
Q

Ammonium ion chemical symbol

A

NH4+

22
Q

Third soil nitrogen form

A

Nitrate ion

23
Q

Nitrate ion chemical symbol

A

NO3-

24
Q

At any given time 95-99% of available nitrogen in soil is in _ forms

A

Organic

25
Q

Organic forms of nitrogen are either in _ or _ residues

A

Plant

Animal

26
Q

Another organic form of nitrogen is in soil’s

A

Organic matter

27
Q

Organic forms of nitrogen are in living soil organisms, mainly microbes such as

A

Bacteria