การผลิตปุ๋ยเคมีและปุ๋ยที่มีธาตุไนโตรเจนเป็นสารประกอบ

This class includes:
- manufacture of fertilizers:
* straight or complex nitrogenous, phosphatic or potassic fertilizers
* urea, crude natural phosphates and crude natural potassium salts
- manufacture of associated nitrogen products:
* nitric and sulphon

This class excludes:
- mining of guano, see 0891
- manufacture of agrochemical products, such as pesticides, see 2021
- operation of compost dumps, see 3821