NF U42-002-2:1992 Fertilizers. Fertilizers with declared micronutrient(s) content(s) for application to the soil. Part 2 : micronutrient(s) in organic combination(s). Types and specifications.
1990NF U42-002-1:1990 Fertilizers. Fertilizers with declared micronutrient(s) for application to the soil. Part 1 : micronutrient(s) under mineral chemical combination(s) form, exclusively.