NPK

[ en-pee-key ]
/ ˈɛnˈpiˈkeɪ /

abbreviation, noun

Horticulture. a ratio of percentages of the three nutrients—nitrogen, phosphorus, and potassium—that are especially important in a plant fertilizer. A fertilizer’s NPK is given as a series of three numbers, for example, 24–6–6, which means the content is 24 percent nitrogen, 6 percent phosphorus, and 6 percent potassium, so the NPK expressed as a simple ratio is 4:1:1.

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Origin of NPK

First recorded in 1900–05; from the chemical symbols for nitrogen (N), phosphorus (P), and potassium (K)

Words nearby NPK

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020