Test1 Nitrogen

Question 1

Nitrification-

Answer 1

NH4 -NO3

Question 2

Mineralization-

Answer 2

R-NH2 - NH4

Question 3

Immobilization

Answer 3

NH4 - R-NH2

Question 4

Denitrification

Answer 4

NO3- N2(gas), Carbon must be present

Question 5

Volatization-

Answer 5

NH3 soil- NH3 atm

Question 6

Fixation-

Answer 6

N2 - NH3

Question 7

Most available form of NN in the soils

Answer 7

Ammonium Nitrate

Question 8

Name the liming agents-

Answer 8

CaO(fast) ,
Ca(OH)2(expensive),
CaCO3(basis for all lime)
MgCO3 (slow)

Question 9

When you have ppm how do you reach percent?

Answer 9

divide by 10,000

Question 10

What is the magic number for C:N ratio?

Answer 10

25:1

Question 11

What is the formula for urea?
what does it need to me mineralized?
what form is it.

Answer 11

CO(NH2)2
Enzyme Urease
Slow release

Question 12

WHats the formula for Ammonium sulfate?

Answer 12

(NH4)2SO4

Specific to tobacco and onion.

Question 13

Whats a disadvantage to using UAN?

Whats the formula? whats a benefit?

Answer 13

CO(NH2)2 +NH4NO3
readily available and slow release, even application.
Paying for water

Question 14

WHen do you use DAP

Answer 14

when you need phosphate

Question 15

The earths surface is covered in how many lbs on N?

Answer 15

37,000 tons

Question 16

What are the four soil conditions that contribute to the influence of nitrification and dentrification

Answer 16

pH,
amount of NH4
Moisture
Aeriation

Question 17

what are two kinds of biological fixation?

Answer 17

symbiotic and non-symbiotic

Question 18

what is the base for the manufacture of most common N fertilizers

Answer 18

True

Question 19

What is the first N product of the mineralization-

Answer 19

NH4

Question 20

What is the process for making fertilizers called?

Answer 20

Harber -Bosch

Question 21

Organic sources of N are essentially what?

Answer 21

Slow release

Question 22

All nitrogen solutions are classified as ?

Answer 22

pressure or non pressure