Efficient and effective use of fertilizers has become more essential than ever. The world`s population is expected to rise from today`s 7.2 billion to over 9 billion by 2050, and an increasing number of people will live in densely-populated urban areas. As incomes in emerging nations rise, more meat is consumed and thus more grain to feed livestock must be produced. Bio-fuels are also generating demand for increased yields. Because there is limited space for agricultural expansion, yields must be optimised. At...