Table 6. List of commonly used
inorganic fertilizers used for mrigal culture and their calcium and NPK
content |
Type of fertilizer |
Calcium |
Nitrogen |
Phosphorus |
Potassium |
|
|
|
|
|
|
CALCAREOUS |
|
|
|
|
|
Calcium carbonate (limestone) |
40 |
|
|
|
|
Calcium oxide (quicklime) |
71.5 |
|
|
|
NITROGEN FERTILIZERS |
|
|
|
|
|
Sodium nitrate |
|
16.5 |
|
|
|
Ammonium sulphate |
|
21.2 |
|
|
|
Ammonium nitrate |
|
35 |
|
|
|
Urea |
|
46.7 |
|
|
|
Ammonium phosphate, dibasic |
|
21.2 |
23.5 |
|
|
Ammonium phosphate , monobasic |
|
12.2 |
27 |
|
POTASSIUM (POTASH) FERTILIZERS |
|
|
|
|
|
Potassium chloride (murate of potash) |
|
|
|
52.4 |
|
Potassium nitrate |
|
13.8 |
|
38.7 |
|
Potassium sulphate |
|
|
|
44.9 |
PHOSPHATE FERTILIZERS |
|
|
|
|
|
Di-calcium phosphate, anhydrous |
29.5 |
|
22.8 |
|
|
Bone meal |
30 |
|
15 |
|
|
Rock phosphate (fluoroapatite) |
35 |
|
13 |
|
|
Single superphosphate |
|
|
7-8.7 |
|
|
Triple superphosphate |
|
|
19.2-23.6 |
|
Data source: Adapted from Tacon (1987) |
|
|
|
|
|
|
|
|
|
|