Labeling of fertilizer

"NPK" redirects here. For other uses, see NPK (disambiguation).

Many countries have standardized the labeling of fertilizers to indicate their contents of major nutrients.[1][2] The most common labeling convention, the NPK or N-P-K label, shows the amounts of the chemical elements nitrogen, phosphorus, and potassium.

  1. ^ Chambers, Albert; Sally Rutherford (27 November 2007). "Voluntary Standards for the Fertilizer and Supplements Industry". Retrieved 3 February 2010.[dead link]
  2. ^ "Draft Code of Practice for Fertilier Description and Labeling". Fertilizer Industry Federation Association (FIFA). 15 September 2008. Retrieved 3 February 2010.