what do fertilisers contain
Fertilisers contain minerals such as nitrogen, potassium and phosphorus, which help plants to grow. Fertilisers increase crop yields but cause the problem of 'eutrophication' when they're washed by rainwater into rivers and lakes.Most chemical fertilisers are made by the reaction of an acid with an alkali.hey're minerals, which must first dissolve in water so that plants can absorb them through their roots. Fertilisers provide plants with the essential chemical elements needed for growth particularly nitrogen, phosphorus and potassium.