Fri, 14 December 2018
Thanks to my grandmother for inspiring this story, and to my mother for helping make it. If you like our videos, please consider supporting MinuteEarth on Patreon! - Alex
Bird poop was the gateway fertilizer that turned humanity onto the imported-chemical-based farming system of modern agriculture.
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Image Credits: Farquhar, W.H. 1884. The Annals of Sandy Spring, Vol. I, Pg. xxix-xxx. Baltimore: Cushings & Bailey. http://bit.ly/2QOWGKr
Canby, T.Y. 2002. The Annals of Sandy Spring, Vol. VI. Introduction: Pg. 26-27. Sandy Spring Museum.
Cushman, G.T. 2013. Guano and the opening of the Pacific World: A global ecological history. Cambridge University Press.
Cushman, G.T., personal communication, October 2018.
Farquhar, W.H. 1884. The Annals of Sandy Spring, Vol. I, Pg. xxix-xxx. Baltimore: Cushings & Bailey. http://bit.ly/2QOWGKr
Lorimor, J., Powers, W., Sutton, A. 2004. Manure Characteristics. MWPS-18, Section 1. Second Edition. Table 6. Iowa State University, Ames, Iowa. http://msue.anr.msu.edu/uploads/files/ManureCharacteristicsMWPS-18_1.pdf
Robinson, M.B. April 26, 2007. In Once-Rural Montgomery, a Rich History. The Washington Post. http://www.washingtonpost.com/wp-dyn/content/article/2007/04/25/AR2007042501342.html
S. Sands & Son. 1875. The American Farmer: Devoted to Agriculture, Horticulture and Rural Life. Vol. 4, Issue 12, pg. 417-418. Baltimore. https://play.google.com/books/reader?id=ul1TAAAAYAAJ&hl=en&pg=GBS.PA417
Stabler, H.O. 1950. The Annals of Sandy Spring, Vol. V, Pg. 43. American Publishing Company.
Szpak, P., et al. 2012. Stable isotope biogeochemistry of seabird guano fertilization: results from growth chamber studies with Maize (Zea mays). PloS one, 7(3), e33741. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0033741
Thanks also to the Sandy Spring Museum.