|
Micronutrients
Micronutrients are a group of nutrients
which are essential for plant growth but are required
by plants in small quantities. Intensive cropping deplete
all nutrients including micronutrients from the soil
at a fast rate. Therefore selective use of micronutrients
is necessary for increasing agricultural production.
Iron, zinc, manganese, copper, boron, molybdenum and
chlorine fall under this category.
Ten micronutrients namely zinc Sulphate (monohydrate
& heptahydrate) manganese Sulphate, borax, solubor,
copper Sulphate, ferrous Sulphate, ammonium molybdate,
chelated zinc, and chelated iron have been incorporated
in the Fertiliser (Control) Order (FCO). Fortified fertilisers
like Zincated urea and boronated single superphosphate
have also been notified under FCO. Nutrient content
of micronutrients fertilisers is listed in Table
1.3.
Table 1.3 - Nutrient Contents of
Micronutrient Fertilisers
| SI. No |
Name |
Formula |
Element/Forms |
Contents(%) |
| 1. |
Zinc Sulphate* |
ZnSO4.7H2O |
Zn |
21.0 |
| 2. |
Mangnese Sulphate* |
MnSO4 |
Mn |
30.5 |
| 3. |
Ammonium Molybdate |
(NH4)5 Mo7)244H2O |
Mo |
52.0 |
| 4. |
Borax(for soil application) |
Na2B4O7.5H2O |
B |
10.5 |
| 5. |
Solubor(foilar spray) |
Na2B4O7.5H2O
+ Na2B10O16.10H2O |
B |
19.0 |
| 6. |
Copper Sulphate* |
CuSO4.5H2O |
Cu |
24.0 |
| 7. |
Ferrous Sulphate* |
FeSO4.7H2O |
Fe |
19.5 |
| 8. |
Chelated Zn |
as Zn-EDTA |
Zn |
12.0 |
| 9. |
Chelated Fe |
as Fe-EDTA |
Fe |
12.0 |
| 10. |
Zinc Sulphate monohydrate |
ZnSO4.H2O |
Zn |
33.0 |
* Average sulphur content
i) ZnSO4 = 15%
ii) MnSO4 = 17%
iii) CuSO4= 13%
iv) FeSO4 = 19%
@ Specification as per FCO Amendment
1987
|
