Keywords: suspension fertilizer, clay, ammonium phosphate, MAP, DAP, ammonia, phosphoric acid, gelling, attapulgite, bentonite.

The origins of suspension fertilizers are outlined, with the commercial reasons for their introduction. The raw materials which are widely used are identified and described. The physical and chemical processes involved in the manufacture and storage of suspension fertilizers are described. The features and benefits of different raw materials and processes are discussed. The paper provides a range of instructions and guidance for the successful production and storage of fluid suspension fertilizers based on the extensive practical experience of the author.

Jim May, Jim May Equipment Group, Arlington, TX 76013, USA.

35 Pages, 4 Figures, 7 Tables.