Chris Jones is a research engineer (IIHR-Hydroscience and Engineering) at the University of Iowa. An earlier version of this piece was first published on the author’s blog. -promoted by Laura Belin

I have written some things about manure lately (link, link, link, link). If you were able to make it to the end of those essays, you learned:

· We have a lot of livestock animals in Iowa

· These animals produce a lot of waste

· This waste is used to fertilize crops

· Manure is a good fertilizer

· Sales of commercial fertilizer are not affected very much by the availability of manure

Chris Jones is a research engineer (IIHR-Hydroscience and Engineering) at the University of Iowa. An earlier version of this piece was first published on the author’s blog. -promoted by Laura Belin

The Landscape of Capitalism by former University of Iowa professor Robert F. Sayre (1933-2014) is an excellent short history of Iowa agriculture. I read Sayre’s essay many years ago and had all but forgotten it, but it was restored to my memory recently by a conversation I had with an ag drainage engineer.