DENDROLOGY

Detailed explanation-1: -Nitrification. Nitrifying bacteria in the soil convert ammonia into nitrite (NO2-) and then into nitrate (NO3-). This process is called nitrification. Compounds such as nitrate, nitrite, ammonia and ammonium can be taken up from soils by plants and then used in the formation of plant and animal proteins.

Detailed explanation-2: -Plants take up nitrate from the soil via the transporter proteins present in the root cell membrane. There are other nitrate transporters that are involved in moving nitrate within plants to different tissues as needed.

Detailed explanation-3: -Plants require nitrogen in the form of nitrate ions absorbed by the roots to make amino acids, chlorophyll and nucleotides.

Detailed explanation-4: -Ammonium taken in by plants is used directly in proteins. This form is not lost as easily from the soil. Organic nitrogen exists in many different forms. It is changed into ammonium, then into nitrates, by microorganisms.