"Hydroponics" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus,
MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure,
which enables searching at various levels of specificity.
A technique for growing plants in culture solutions rather than in soil. The roots are immersed in an aerated solution containing the correct proportions of essential mineral salts. (From Concise Dictionary of Biology, 1990)
Below are MeSH descriptors whose meaning is more general than "Hydroponics".
Below are MeSH descriptors whose meaning is more specific than "Hydroponics".
This graph shows the total number of publications written about "Hydroponics" by people in this website by year, and whether "Hydroponics" was a major or minor topic of these publications.
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