C4 AGRICULTURE ENVIRONMENT MANAGEMENT Quiz 2 FEB 6513

The major nitrogenous organic residue in soil originates from death and decay of plants and _________.

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

_____________ and ______________ are chemoautotrophic organisms.

____________ 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

_____________ is water that exists underground in saturated zones beneath the land surface.

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

Volcanic ash, aerosols, and mineral dust can also be significant ________ sources.

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