MAP FERTILISER
MAP (Mono-Ammonium Phosphate) is a major cropping fertilisers used in Australia as a source of phosphorus and nitrogen, MAP fertiliser and MAP blends are used extensively in cropping systems and for sowing pastures. The low level of nitrogen makes it useful as a ‘starter’ fertiliser and as there is no free ammonia, the risk of affecting germinating seeds is minimal.
GENERAL MAP SPECIFICATIONS – NH4H2PO4
| PRODUCT | N | P | K | S |
| %w/w | %w/w | %w/w | %w/w | |
| Granular MAP | 10.0 | 21.9 | 0.0 | 1.5 |
DAP FERTILISER
DAP (Di-Ammonium Phosphate) is a major cropping fertilisers used in Australia as a source of both phosphorus and nitrogen. The high phosphorus content makes it a true high analysis fertiliser. DAP and DAP blends are used on a range of crops in broad-acre farming, cereals, sugar cane, sowing pastures, dairy pastures, fodder crops and also in horticultural crops; for example, vegetables and tree crops.
GENERAL DAP SPECIFICATIONS – (NH4)2HPO4
| PRODUCT | N | P | K | S |
| %w/w | %w/w | %w/w | %w/w | |
| Granular DAP | 18.0 | 20.0 | 0.0 | 1.6 |
DAP is a major cropping fertilisers used in Australia as a source of both phosphorus and nitrogen. The high phosphorus content makes it a true high analysis fertiliser. DAP and DAP blends are used on a range of crops in broad-acre farming, cereals, sugar cane, sowing pastures, dairy pastures, fodder crops and also in horticultural crops; for example, vegetables and tree crops.
MAP and DAP are made by ammoniating phosphoric acid. The ratio of ammonia (NH3) to phosphoric acid (H3PO4) determines which product is produced. MAP fertiliser (NH3 +H3PO4 -> NH4H2PO4), or DAP fertiliser (2NH3 +H3PO4 -> (NH4)2HPO4 ).
