The kind of weather we have often is the deciding factor on crop yields in Iowa. The moisture used by crops comes from two sources-soil reserves and crop-season rainfall. Here's how we stand for the year ahead.
Shaw, R. H. and Duncan, E. R.
"Crop Yield Prospects for 1960,"
Iowa Farm Science: Vol. 14
, Article 3.
Available at: http://lib.dr.iastate.edu/farmscience/vol14/iss7/3