Editing Plant nutrition (section)

==History==

[[Carbon]], [[hydrogen]] and [[oxygen]] are the basic nutrients plants receive from air and water. [[Justus von Liebig]] proved in 1840 that plants needed [[nitrogen]], [[potassium]] and [[phosphorus]]. [[Liebig's law of the minimum]] states that a plant's growth is limited by nutrient deficiency.<ref>{{cite web |title=Liebig's law of the minimum |website=Oxford Reference |url=https://www.oxfordreference.com/view/10.1093/oi/authority.20110803100104700}}</ref> Plant cultivation in media other than soil was used by Arnon and Stout in 1939 to show that [[molybdenum]] was essential to [[tomato]] growth.{{Citation needed|date=May 2023}}