Nitrogen Flashcards
Nitrogen is an essential for plant (3)
Growth
Development
Reproduction
Most common deficiency in plants
Nitrogen
Nitrogen from (2) is not directly available to plants
Atmosphere
Earth’s crust
Healthy plants contain (2) (range) percent nitrogen in above ground tissue
3-4
Nitrogen concentration is much higher compared to
Other nutrients
Only nutrients that present higher concentration than nitrogen (3)
Carbon
Hydrogen
Oxygen
Hydrogen, oxygen, carbon don’t _
Play a significant role in most soil fertility programs
Nitrogen is a major component in
Chlorophyll
Chlorophyll is the compound by which plants
Use sunlight energies to produce sugars from water and carbon dioxide (photosynthesis)
Nitrogen is also a major component of
Amino acids
Amino acids are
The building blocks of protein
Without proteins, plants
Wither and die
Some proteins act as _ in plant cells
Structural units
Some proteins act as
Enzymes
Enzyme proteins make possible
Many of the biochemical reactions in which life is based
Nitrogen is essential for crops to achieve
Optimum yields
Nitrogen increases _ content of plants directly
Protein
Soil nitrogen exists in _ general forms
3
1st form of soil nitrogen (organic)
Organic nitrogen compounds
Second form of soil nitrogen (am)
Ammonium ions
Ammonium ion chemical symbol
NH4+
Third soil nitrogen form
Nitrate ion
Nitrate ion chemical symbol
NO3-
At any given time 95-99% of available nitrogen in soil is in _ forms
Organic
Organic forms of nitrogen are either in _ or _ residues
Plant
Animal
Another organic form of nitrogen is in soil’s
Organic matter
Organic forms of nitrogen are in living soil organisms, mainly microbes such as
Bacteria
