ammoniated superphosphate
- CAS No.
- Chemical Name:
- ammoniated superphosphate
- Synonyms
- ammoniated superphosphate
- CBNumber:
- CB3945726
- Molecular Formula:
- Molecular Weight:
- 0
- MDL Number:
- MOL File:
- Mol file
ammoniated superphosphate Chemical Properties,Uses,Production
Definition
Fertilizer produced by mixing ammonia with superphosphate in the ratio of 5 parts to 100.
Agricultural Uses
Ammoniated superphosphate is a powdered or
granulated grey material with an acid odor.
To 9.1 kg of phosphorus (in the form of P2O5), 2.7 to
3.2 kg of ammonia is added. Where concentrated
superphosphate is used, 2 kg of ammonia is added for
every 9.1 kg of phosphorus.
Ammoniated superphosphate contains 2 to 6%
nitrogen and 6 to 21% phosphorus (14 to 49% P2O5,,
Ammoniation of superphosphate offers an inexpensive
way of adding nitrogen to a fertilizer, which reduces the
water-soluble phosphorus content to less than 20% in
ordinary superphosphate whereas nearly 50% in triple
superphosphate. Nitrogen promotes phosphorus uptake
by plants by (a) increasing the tip and root growth, (b)
altering the plant metabolism and (c) increasing the
solubility and availability of phosphorus. Ammoniacal
fertilizers facilitate absorption of phosphorus better than
nitrate fertilizers do.
Ammonium superphosphate becomes easy to store
when made free-flowing by mixing with non-caking
agents like limestone, sand, rice hull, granite dust, kaolin
clay or tobacco stems. It is not effective as a fertilizer for
wheat and rice in laterite soil, but gives higher response
in black cotton soil, alluvial and calcareous soils.
Similar to ammonium phosphate sulphate,
ammoniated superphosphate forms an acid in the soil. In
humid regions, soils develop acidity as a result of
leaching, erosion and crop removal. This feature is being
used successfully even in low fertility agricultural soils.