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Iowa Crop Variety Test Publications Guide

This guide provides direct links and pointers for locating variety trials (or performance tests) for specific field crops in Iowa, both past and present. It also provides locations and call numbers for the ISU Library.


Published reports of alfalfa variety experiments at the Iowa Agricultural Experiment Station are available for 1897-2007 with some gaps and overlap:


Series & Number

Call number & Location


“Crop Report.” Bulletin (Iowa Agricultural Experiment Station) - no. 34.  Includes alfalfa and several other crops.

S542 Io9b – Archives, Library Storage Building, and Media Center (on microfilm)


Hughes, H.D.  “Varieties of Alfalfa Seed.”  The Iowa Agriculturist, v. 18, no. 4, July 1917, pp. 163-165.

S1 Io83 – Archives, Library Storage Building, and Media Center (on microfilm)


Thurman, Floyd. Field Crop Tests on Iowa Farms. M.S. thesis, Iowa State College, 1940.

SB186 T425f - Storage Building and

C O 1940 Thurman - Archives


Croft, J. Calvin.  Alfalfa Varieties and Seed Sources.  M.S. thesis.  Iowa State College, 1932. 

SB205 .A3 C874a - Library Storage Building


Agron. series?

Unable to locate/verify


Some results were published in a series of articles written by C.P. Wilsie in Farm Science Reporter and Iowa Farm Science.



AG series, no. 84-*

* = last digit of the year the report was issued – e.g., AG-84-5 was used for trials for 1965, 1975, 1985, 1995, etc.

S451 I8 A4x - Archives

The test name varies: Iowa Alfalfa Yield Test Report, Iowa Crop Performance Test – Alfalfa, Iowa Crop Performance Test – Alfalfa and Other Forages.

Your Librarian

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Lorrie Pellack
Head, Research & Instruction Services Dept.
150c Parks Library
Ames, IA 50011-2140
Phone: 515-294-5569