Further insights into why potassium fertility is a paradox

S. A. Khan, Richard L Mulvaney, T. R. Ellsworth

Research output: Contribution to journalArticlepeer-review


For many years, crop potassium (K) availability has been estimated by soil testing the plow layer for exchangeable K, in conjunction with potassium chloride fertilization widely promoted as an essential prerequisite for ensuring crop yield and quality. As rigorously documented in our paper, both components of chemical-based K management are seriously flawed by the lack of a scientific basis. Under the pretext of providing economic benefit for the producer and a healthy food supply for the public at large, the real purpose is to generate revenue for the fertilizer industry.

Original languageEnglish (US)
Pages (from-to)120-123
Number of pages4
JournalRenewable Agriculture and Food Systems
Issue number2
StatePublished - Apr 10 2015


  • Cd bioaccumulation
  • KCl
  • potash fertilizer
  • profitability
  • soil K testing

ASJC Scopus subject areas

  • Food Science
  • Agronomy and Crop Science

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