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To download a pdf of this article, visit http://cenm.ag/fertilizers
References used to create this graphic:
“A Crash Course in Fertilizers: NPK Ratios, Synthetic vs. Organic, and More.” Sunset, Sept. 3, 2004.
Dimech, Adam. “The Potassium Myth.” The Story of Flowers. Updated Feb. 10, 2013.
Scherer, H. W. “Fertilizers and Fertilization.” In Encyclopedia of Soils in the Environment, edited by Daniel Hillel, 20–26. Elsevier, 2005.
Solution Center for Nutrient Management. “Crop Nutrient Requirements.” Accessed March 5, 2020.
A collaboration between C&EN and Andy Brunning, author of the popular graphics blog Compound Interest
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