Oxford Instruments plc

Fertilizers boosting soil productivity for agriculture sector

The principle fertilisers used to boost soil productivity are phosphate based. Monoammonium Phosphate (MAP) and Diammonium phosphate (DAP) are used for their ability to deliver Nitrogen and Phosphorus (both macronutrients) to soil as solid fertilisers. Phosphate rock is the raw material for production and is extracted from large deposits across Florida, the Southern Mediterranean into the Middle East (namely Morocco and Saudi Arabia) and on into Russia and China. To this rock, sulfuric acid is added producing phosphoric acid. This acid is then reacted with ammonia and elemental sulfur producing a sulfur enhanced fertiliser. During this process, the dust produced can potentially reach explosive levels.