Agriman (Pty) Ltd | 566 Ruben Stein Drive, Moreleta Park, Pretoria 0044, Gauteng

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 into rivers and lakes by rainwater. Most chemical fertilisers are made by the reaction of an acid with an alkali.