Fertilizers can be mineral or organic and their quality is assessed based on physical and chemical characteristics like moisture content and nutrients. Moisture content is determined by the method of water of crystallization using sulfuric acid. Gravimetric analysis uses an oven-drying method to estimate moisture and involves chemicals like ammonium sulfate and sodium nitrate. Urea nitrogen content can be estimated along with total nitrogen through digestion with sulfuric acid.

3.  The term Fertilizer
refers to mineral
Fertilizers and
organic Fertilizers.
 The main Objective of
Analyzing Fertilizers
is to assess their
Quality
 Fertilizer quality is
notify in terms of
physical and chemical
Characteristics.

4.  Moisture:
Method of Water of
Crystallization
Chemical involved in
it is Sulphuric Acid

5.  Gravimetric Method :
1) It is also called as
Oven-Drying Method
2) Chemicals involved in
it is Ammonium
Sulphate and Sodium
Nitrate.

6.  The Urea form of N Can be Estimated together
with total N by digestion of Sulphuric Acid.