Classification of chemical fertilizer/inorganic fertilizer/ fertilizer. https://cststudy.blogspot.com/ |
B.Sc.Ag. (Hons) Part-I
Classification of chemical fertilizer/inorganic fertilizer/ fertilizer
A. According to number of nutrients
contained
1.
Single/simple/straight fertilizer: Fertilizers that supply only one
nutrient. On the basis of the nutrient, they may be of the following types:
a. Nitrogenous
fertilizer
i. Fertilizer containing nitrogen in ammonium (NH4) form
such as ammonium sulphate, ammonium chloride etc.
ii. Fertilizer containing nitrogen in nitrate (NO3) form
such as calcium nitrate, sodium nitrate, potassium nitrate etc.
iii. Fertilizer containing nitrogen in amide form such as
urea.
b. Phosphatic
fertilize
i. Fertilizers containing water soluble phosphorus such as
super-phosphate, concentrated superphosphate, etc.
ii. Fertilizers containing citrate soluble phosphate such as
dicalcium phosphate, basic slag etc.
iii. Fertilizers containing insoluble phosphate such as rock
phosphate.
c. Potassic
fertilizer
Such as potassium chloride, potassium sulphate etc.
2. Compound fertilizer:
Fertilizers containing more than one nutrient through chemical bonding. Such as
monoammonium phosphate (MAP), (diammonium phosphate (DAP) etc.
3. Mixed Fertilizer:
Fertilizers prepared through mixing of different fertilizers. They may be of
the following two types:
a. Complete
fertilizer: Mixed fertilizer that contains 3 primary nutrients i.e. N, P
and K.
b. Incomplete
fertilizer: Mixed fertilizer that contains any 2 primary nutrients i.e. N
and P or, K and P or, N and K. The quantity of nutrients varies in different
fertilizer mixtures, based on which they may be classified as:
i. Low grade
fertilizer mixtures: This category of mixture contains a total of plant
nutrients up to or less than 14 per cent in it. Such mixtures are termed as low
grade mixtures.
ii. Medium grade
mixtures: This category of mixture contains a total of plant nutrients
between 15 to 24 per cent in it.
iii. High grade
mixtures: When the total nutrient contents range between 25 to 35 per cent
in any mixture then the mixture is said to be of high grade.
Fertilizer mixtures can be prepared at the farm or at home.
The following combinations should be avoided in preparing the mixed fertilizers
at home:
• Ammonium sulphate, ammonium chloride, other ammoniacal
fertilizers and nitrogenous organic manures with lime.
• Sodium nitrate or potassium nitrate with superphosphate.
• Nitrochalk with superphosphate or lime.
• Ammonium Sulphate-nitrate with lime.
• Urea with superphosphate.
• Superphosphate with lime or calcium carbonate or wood
ashes.
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