Fertilizer quality

Fertilizers at DSM Agro are manufactured as high quality materials in the form of granules. It is in the interest of all concerned with the handling and storage of fertilizers to ensure that the quality is maintained right up to the point of usage:namely no moisture pick up or caking, free from contamination and of minimal dust content.

• Prevention of moisture pick up and caking.
  This may require covering bulk material with plastic sheets during storage or transportation and keeping storage buildings closed as much as possible to prevent ingress of moist air.
• Prevention of contamination.
  Storage areas should be cleaned before fertilizer is introduced. Access areas should be kept clean during storage. Spillage should be cleared up as soon as practicable.
• Prevention of product breakdown.
  Fertilizers, should not be stored in direct sunlight or in conditions where temperature cycling can occur, otherwise particles may breakdown.

Many of the procedures necessary to maintain quality are the same as those required for the safe handling and storage of ammonium nitrate based fertilizers.
Source: Handbook for the Safe Storage of Ammonium Nitrate Based Fertilizers,1992