C4 AGRICULTURE ENVIRONMENT MANAGEMENT Quiz 2 FEB 6513

The major nitrogenous organic residue in soil originates from death and decay of plants and (a)   .

Organic residues in the soil are taken up by microorganism which give products such as _________, _________, and __________.

(a)  

_____________ and ______________ are chemoautotrophic organisms.

(a)  

(a)   involves in the oxidation of nitrite to nitrate.

X involves in the oxidation of ammonium to nitrite. Identify X

• Nitrosomonas

• Nitrobacter

• Toyobacillus

• Mycoplasma

________ ________ helps in the exchange of water among air, land, sea, living plants and animals

(a)  

(a)   is water that exists underground in saturated zones beneath the land surface.

The upper surface of the saturated zone is called the ______ _______.

(a)  

Volcanic ash, aerosols, and mineral dust can also be significant (a)   sources.

The (a)   is a geographic coordinate that indicates the North-South position of a particular point on the surface of the earth.