• University Archives, Holdings, Digital Archives, Image Thumbnails: Images of the Morrow Plots, aerial views, professors and research at the Morrow Plots, c. 1904-1970.
• University Archives, Holdings, Digital Archives, Morrow Plots Notebook (Digital Surrogates): Morrow Plots Notebook 1876-1913, 1967 (Digital Surrogates).
• University of Illinois Archives, WILL Sound Recordings (Digital Surrogates): The Morrow Plots.

College and Departmental Records

• Agriculture, Consumer, and Environmental Sciences Photograph File (Born Digital Records):
  • ACES Campus during heavy snow.
  • Crop Sciences students in Morrow Plots.
  • Draft horses pull a man and wagon to plant seeds in the Morrow Plots c. 1935.
  • Historical marker in front of the Morrow Plots.
  • James H. Pettit and Cyril Hopkins taking soil samples.
  • Michelle Wander with soil samples.
  • Michelle Wander with soil samples (2).
  • Michelle Wander with soil samples (3).
  • Morrow Plots.
  • Morrow Plots (2).
  • Morrow Plots and Mumford Hall.
  • Morrow Plots and Mumford Hall (2).
  • Morrow Plots and Mumford Hall (3).
  • Morrow Plots, early 1940's.
  • Morrow Plots, mid 1950's planted in corn.
  • Morrow Plots, late 1960's.
  • Morrow Plots, showing sign.
  • Morrow Plots with soybeans growing.
  • Orion Samuelson, WGN radio broadcaster (left) talks with UI agronomist Ted Peck at the Morrow Plots on its 125th anniversary.
  • Orion Samuelson, WGN radio broadcaster (left) talks with UI agronomist Ted Peck at the Morrow Plots on its 125th anniversary (2).
  • Overview of Morrow Plots.
  • Overview of Morrow Plots in continuous corn.
  • Overview of Morrow Plots in continuous corn (2).
  • Overview of Morrow Plots in continuous corn (3).
  • Recording the results of the corn harvest in the Morrow Plots.
  • Research book with early data.
  • Research book with early data (2).
  • Research book with early data (3).
  • Research book with early data (4).
  • Research book with early data (5).
  • Soil sample taken from Morrow Plots.
  • Speaker and crowd at dedication ceremony making the Morrow Plots a National Historic Landmark.
  • University of Illinois scenic shots.
  • View of Morrow Plots in summer with corn, soybeans, and wheat.
  • Yellow field corn harvested from Morrow Plots.
• Electrical and Computer Engineering Photograph and Video File (Born Digital Records and Digital Surrogates):
  • Morrow Plots.
  • Morrow Plots (2).

Publications and Reference Files

• University of Illinois Archives, Topic Files (Digital Surrogates): "Morrow Plots were way off campus" by C. C. Burford, "Independence and Morrow Plots" by L. F. Welch, "The Morrow Plots: A Century of Learning", "The Life Work of Professor George E. Morrow" by Stephen A. Forbes, correspondence between Anna C. Glover and Eugene Davenport.
• Bermeo, Edith Esther. "Evaluation of long-term management effects on soil organic N distribution in the Morrow Plots," M.S. Thesis, 2021.
• Cescas, Michel. "Rate of Rock Phosphate Disappearance for the Morrow Plots and Electron Microprobe Analysis of Soil Concretions and Mineral Inclusions." 1968.
• College of Agriculture. "The Morrow Plots." 1961.
• College of Agriculture. "The Morrow Plots: A National Historic Landmark. Special Publications No. 16." 1969.
• DeTurk, Ernest Everett; Smith, Louie Hernie; Bauer, Frederick Charles. "Lessons from the Morrow Plots." 1927.
• Liu, Jing. "Neural Networks for Setting Target Corn Yields." 2000.
• Odell, Russell Turner. "The Morrow Plots: A Century of Learning." 1982.

News Media Records

• Bureau County Tribune
  • "Farm and Stock News", 24 June 1921, page 2.
  • "Land Values in Farming", 2 June 1922, page 5.
• Cairo Bulletin
  • "Crop Rotation and Soil Treatment are of Importance", 11 March 1922, page 3.
• Champaign Daily News
  • "Our Agronomy Experiment Fields", 11 January 1915, page 1.
  • "Morrow Plots in Use Near 40 Years", 16 November 1919, page 25.
• Daily Illini
  • "Farmers Will Meet Next Week", 7 June 1917, page 4.
  • "University's Field for Testing Soils Oldest in Country", 28 March 1920, page 12.
  • "South Farm Plots Oldest in America", 9 October 1920, page 7.
  • "McMahon in Country Gentleman Tells of 'Agriculture a la Illinois'", 2 April 1921, page 1.
  • "Rotation of Corn Yields Large Crop", 9 March 1922, page 5.
  • "Farmer Guests get Acquainted with Experiments in Agriculture", 30 June 1923, page 1.
  • "Start Analyses of Soil Samples", 5 December 1923, page 6.
  • "Illinois Soil Experiment Field, Started in 1879 is Oldest Plot in Whole Nation", 6 January 1924, page 16.
  • "Illinois Farmers to See University Plant Next Week", 13 June 1924, page 1.
  • "Thousand Visit University for Ag Open House", 17 June 1924, page 1.
  • "Institute to Hear Ag Faculty Men", 7 February 1925, page 1.
  • "Experimental Plots Well Under Way", 14 April 1925, page 1.
  • "Morrow Plots a Half Century Old, Bulletin Reveals", 4 June 1925, page 2.
  • "Aurora Fair will Exhibit Miniature of Morrow Plots", 12 August 1925, page 2.
  • "It's Corn Shuckin' Time on Ag College Experimental Plots", 3 November 1925, page 2.
  • "70 Projects Being Conducted Upon Uni Experimental Plots", 24 November 1925, page 5. 
  • "Ag Teachers Rate Instruction Here as Outstanding", 7 April 1926, page 2.
  • "4 AG Groups to Meet Here During Week", 15 June 1926, page 1.
  • "Morrow Fields America's Oldest", 5 October 1926, page 5.
  • "Agronomy Work Develops Rapidly; Founded in 1900", 30 March 1927, page 4.
  • "Benefits of Soil Treatment, Crop Rotation Shown", 8 July 1927, page 2.
  • "Crop Production Tests Reported in Ag Bulletin", 27 January 1928, page 1.
  • "Gault Tells Farmers of Experiment Work", 20 September 1929, page 1.
  • "Ag Experimental Station Survives Many Difficulties", 21 September 1929, page 1.
  • "Agricultural Experiment Station Aids Farmers Throughout State", 16 November 1929, page 6.
  • "Illinois Firsts", 18 January 1930, page 7.
  • "Oats are Planted in Morrow Plots", 11 March 1930, page 7.
  • "College Sponsors 3 State Activities to Train Farmers", 27 March 1930, page 13.
  • "Morrow Plots, Nation's Oldest, Remain in Use", 27 March 1930, page 31.
  • "4 County Groups Tour Uni Farms; Facultymen Talk", 18 June 1930, page 1.
  • "1,400 Farmers from 13 Counties Visit Campus Yesterday; Discuss Corn, Hogs", 20 June 1930, page 1.
  • "The Farmer's Friend", 20 June 1930, page 4.
  • "Test Plot Yields 57th Corn Crop", 20 October 1932, page 4.
  • "AG Plots Yield Corn Since 1876", 30 November 1933, page 2.
  • "Harvest Time Approaches on Morrow Plots", 29 September 1935, page 5.
  • "Famous Experimental Crop is Harvested by University Men", 22 October 1935, page 3.
  • "Illinois Agriculturist Reviews Early Farming", 9 April 1936, page 4. 
  • "'Morrow Plots Define Depletion' Explains Linsley", 22 April 1936, page 3.
  • "Future of Farming, Business Dependent on Soil Conservation, Mumford Says at USCC Meet", 30 April 1936, page 7.
  • "200 Farm Folk Attend Annual Ag Open House", 23 June 1936, page 1.
  • "Tiny Farm Loses its Oats, Clover; Eight Men Trim Morrow Plots", 2 July 1936, page 1.
  • "Morrow Experimental Plots to be All Corn this Year", 12 May 1937, page 2.
  • "Ag Visitors Ask Aid of Weather in Weed Battle", 22 June 1937, page 2.
  • "Morrow Plots to Go on Air", 29 September 1937, page 3.
  • "Illinois' Research, Work of Alumni Benefit World", 27 February 1938, page 8.
  • "Work of Illinois Farmers Guided by Ag College", 27 February 1938, page 9.
  • "Praise Ag Station for 50 Years of Service", 26 March 1938, page 1.
  • "Hold 2 Meetings at Agricultural College Today", 17 June 1938, page 3.
  • "Roumanian Prince Visits Here; Swedish Royalty May Come", 9 July 1938, page 1.
  • "Morrow Experimental Plots Cultivated for 63 Years", 6 December 1938, page 2.
  • "Yourself and Others", 3 May 1939, page 2.
  • "Ag Open House is This Week", 18 June 1939, page 3.
  • "200 Farmers Attend Ag Open House", 24 June 1939, page 1.
  • "Louisiana Group to Visit College of Agriculture", 23 July 1939, page 3.
  • "Plan 2 Exhibits in Chicago", 23 November 1939, page 2.
  • "Morrow Plots, 63-year-old Experiment, Still Produce", 9 December 1939, page 2.
  • "Value of Morrow Plots Shown to Group", 19 August 1942, page 3.
  • "Campus... Activities", 28 February 1943, page 4.
  • "Soybeans Furnish Oil, Explosives, Paint, Soap", 30 July 1943, page 3.
  • "Founders' Day Marks 77th Birthday", 28 February 1945, page 1.
  • "Experiments Show Soil Response, Productivity", 17 August 1946, page 3.
  • "Illini Firsts", 19 September 1946, page 8.
  • "150 Alumni Attend First Fish Fry", 19 October 1946, page 1.
  • "Experimental Plots Yield Record Corn Crop", 22 January 1947, page 6.
  • "TV to Feature Weed Control", 5 May 1947, page 1.
  • "A Corny Plot: Morrow Field Closes 72nd Growing Year", 2 October 1947, page 5.
  • "1876 Morrow Plots Still Being Tilled", 7 July 1948, page 4.
  • "Agriculturalists Test Crop Rotation in University's Experimental Plots", 4 May 1949, page 1.
  • "UI Morrow Plots, Started in 1876, are Oldest Soil Experiment Area", 15 September 1949, page 5.
  • "Morrow Plots Fail to Give Full Yield for 1st Time in 74 Years of Testing", 3 November 1949, page 8.
  • "Spring's Arrival Brings Planting", 18 April 1950, page 4. 
  • "Hay Yield Upped with Fertilizer", 14 July 1951, page 2.
  • "Ag Tour Strands Hungry Member at Restaurant", 9 August 1951, page 1.
  • "Campus Corn Ready to Pick", 25 October 1951, page 8.
  • "Test Field has Record Yield", 30 November 1951, page 8.
  • "Ag Open House Attracts 125 to Annual Affair at Farms", 27 June 1952, page 1.
  • "You can't tell...", 4 July 1952, page 1.
  • "Agronomists Proud of Corn", 6 November 1952, page 1.
  • "Illini Highlights Reviewed at Anniversary", 28 February 1953, page 1.
  • "Research Plots Supply Vital Data on Improvement, Depletion of Soil", 22 September 1955, page 11.
  • "Bull Says Surplus Food Supply Will Not Feed Growing Population", 8 February 1956, page 1.
  • "Morrow Plots Top Acre Corn Yield with 128 Bushels", 1 December 1956, page 7. 
  • "Morrow Plots Were Way Off Campus", 11 July 1957, page 8.
  • "Knee High by 4th", 3 July 1958, page 5.
  • "Agronomy Day Visitors View UI Morrow Plots, Machinery", 13 September 1958, page 17.
  • "UI Bids for Ag Hall of Fame", 29 October 1958, page 8.
  • "Morrow Plots Weather Drought; Summer Rainfall Half of Average", 5 December 1959, page 8.
  • "Oldest Experimental Plots in U.S. Provide Facts for Ag Researchers", 2 June 1960, page 3.
  • "UI -- State's Biggest Farmer", 1 August 1960, page 49.
  • "Morrow Plots Give Surprising Results", 18 November 1960, page 5.
  • "College of Agriculture Offers Education, Research, Service", 1 August 1962, page 22.
  • "But Expansion Changes Things... Student Life Hard in 1868", 28 February 1967, page 22A. 
  • "Morrow", 25 May 1968, page 10.
  • "A National Historic Site... Officials Dedicate Morrow Plots", 13 September 1968, page 21.
  • "March to Climax 'Business as Usual'... Moratorium Plans", 15 October 1969, page 9.
  • "Guerilla Theatre Fizzles at Morrow Plots... Cream the Corn", 16 October 1969, page 14. 
  • "Letter to the Editor: Morrow Raid", 4 November 1969, page 11.
  • "Aw, shucks", 11 October 1973, page 5.
  • "Corny", 10 October 1974, page 3.
  • "Morrow Plots: 98-year-old Experimental Fields have Effect on Today's University", 26 October 1974, page 14.
  • "Morrow Plots: 98-year-old Experimental Fields have Effect on Today's University cont.", 26 October 1974, page 15.
  • "UI Sites Recognized: Morrow Plots, Altgeld Hall Registered as Historic Sites Worthy of Preservation", 7 December 1974, page 1.
  • "Morrow Plots Outstanding in their Field, Still Attracting Attention from Agronomists", 8 October 1975, page 16.
• DeKalb Daily Chronicle
  • "Farm Topics", 19 August 1926, page 3.
  • "Morrow Plots an Example of Bad Cropping", 31 January 1928, page 4.
• Farm Home
  • "Farmers' Hall of Fame", 1 October 1915, page 12.
• Farmer's Review
  • "A Profitable Farmers' Trip", 14 July 1917, page 6.
• Farmers' Weekly Review
  • "Will County Farm Bureau", 2 October 1929, page 1.
  • "Continuous Corn Land Helped by Using Manure", 4 December 1929, page 7.
  • "Historic Plots Show Evils of Soil Depletion", 22 April 1936, page 1.
  • "University Tour Planned for Farm Men and Women", 1 July 1936, page 1.
  • "Poor Soil Makes First Response to Good Treatment", 16 September 1936, page 1.
  • "Moisture Holding Soils are High in Organic Matter", 16 September 1936, page 1.
  • "Poor Soil Needs Proper Treatment", 4 November 1936, page 2.
  • "Dad and Mother to Visit U.I. Ag. College June 21-25", 16 June 1937.
  • "Tours of U. of I. Farm a Feature at Sports Festival", 1 September 1937, page 4.
  • "Desert in the Making", 7 September 1938, page 1.
  • "More Plant Food Helps Livestock to Thrive Better", 24 April 1940, page 2.
  • "Soil Treatment on Morrow Plots Helps Corn Crop", 24 June 1942, page 8.
  • "Protein in Corn Increased with Use of Legume", 3 January 1945, page 4.
  • "Tests Show Corn Hybrid Excels in Feeding Value", 10 January 1945, page 2.
  • "Heavy Losses in Soil Fertility by Corn Crop", 31 January 1945, page 1.
  • "Poor Soils Mean Poor Food", 4 July 1945, page 1.
  • "Effects of Soil Treatments Given in New Bulletin", 3 July 1946, page 1.
  • "U. of I. Operates 25 Experiment Fields in State", 28 August 1946, page 2.
  • "High Corn Yields in 1946 on U. of I. Morrow Plots", 29 January 1947, page 1.
  • "Destruction of Humus Means Nitrogen Loss Warns Soil Specialist", 19 February 1947, page 1.
  • "Corn Quality High with Treated Soil, Legume Rotation", 21 May 1947, page 1.
  • "Buckardt Enters 15th District Congressional Race", 7 January 1948, page 2.
  • "Morrow Plots to be Open for Tour", 9 June 1948, page 4.
  • "1949 Corn Yields on Morrow Plots Unusual", 2 November 1949", page 2.
  • "Soil Needs Plant Food Plus Nitrogen and Organic Matter", 14 December 1949, page 2.
  • "Losses of Organic Matter Depend on Soil Management", 8 February 1950, page 4.
  • "Walker Again Warns of Dangers of Soil Depletion", 19 April 1950, page 5.
  • "More Grain, Less Cobs on Treated Land", 14 June 1950, page 5.
  • "New Bulletin Tells Advantages of Legumes", 9 August 1950, page 8.
  • "Losses of Organic Matter Depend on Soil Management", 16 August 1950, page 3.
  • "Don't Choke Your Soil, Expert Warns", 2 May 1951, page 4.
  • "Morrow Plots Prove Advantages of Treated Soil", 9 May 1951, page 4.
  • "Prize Lists Available for 52nd Live Stock Exposition", 22 August 1951, page 4.
  • "University Plot Yields Record--121.3 Bushels", 26 December 1951, page 1.
  • "Let's Talk it Over", 27 July 1955, page 2.
  • "Morrow Plots Results 1955", 28 March 1956, page 6.
  • "Morrow Plots Give Record Yield with Fertilizer", 28 November 1956, page 2.
  • "Report Results on Morrow Plots", 6 March 1957, page 4.
  • "Plan Open House at Morrow Plots on Agronomy Day", 27 August 1958, page 4.
  • "Record Corn Crop on Morrow Plots", 10 December 1958, page 3.
  • "Farm Comments", 17 December 1958, page 1.
  • "Soil Treatment Boosts Oat Yield on Morrow Plots", 9 September 1959, page 4.
  • "Dryness Cuts Crop on Morrow Plots", 23 December 1959, page 4.
  • "Continuous Corn Has Profit Risks", 29 June 1960, page 3.
  • "Corn Myth Fades, Say UI Scientists", 13 July 1960, page 4.
  • "Record Surprise Yields at UI Morrow Plots", 23 November 1960, page 4.
  • "Farm Comments", 8 November 1962, page 1.
  • "Rain Shortage Slows Yield on Morrow Plots", 5 December 1963, page 1.
  • "Morrow Plots Yield at Nearly Record Pace", 10 December 1964, page 4.
  • "Morrow plots at...", 4 March 1965, page 1.
  • "'65 Top Corn Year on Morrow Plots", 11 November 1965, page 1.
  • "Extension Comments", 14 March 1968, page 3.
  • "Morrow Plots Are National Landmark", 11 July 1968, page 1.
  • "Morrow Plots Add Soybeans to Projects", 2 January 1969, page 6.
  • "Extension Comments", 20 March 1969, page 3.
  • "UI's Morrow Plots National Landmark", 30 September 1971, page 5.
  • "Two properties on the campus...", 16 January 1975, page 8.
  • "Steele is X-tra Yield Speaker", 1 January 1976, page 5.
  • "New Handbook Aid to Farmer in '76", 8 January 1976, page 1.
  • "Research Shows Early Frost Dates in State", 30 September 1976.
  • "University of Ill. Agronomy Day set for August 23", 9 August 2001, page 12.
• Ohio Farmer
  • "Field Crop Notes", 21 May 1910, page 2.
• Prairie Farmer
  • "Causes of Clover Failure", 19 April 1919, page 42.
  • "What Dr. Hopkins is Doing for Greece", 4 October 1919, page 9.
  • "Rotation - Phosphate Add to Land Value", 22 July 1922, page 1.
• The Quill
  • "Land Values in Farming", 16 May 1922, page 2.
  • "The Wealth of the Prairies", 23 January 1923, page 6.
• Rock Island Argus and Daily Union
  • "Crop Rotation and Enriching Sail Favored", 10 March 1922, page 4.
• Sycamore Tribune
  • "4-H Club", 11 September 1959, page 6.
  • "New Phosphorus Tests", 16 December 1960.
  • "Practical Booklet for Farmers Ready at U. of Illinois", 23 November 1962, page 6.
  • "Pinpoint Your Present to Your Man's Hobby", 29 November 1963, page 2.
• Toluca Star-Herald
  • "Marshall-Putnam Farm Bureau Notes", 2 September 1920, page 1.
• True Republican
  • "Profit Shown in Building Up Soil", 10 August 1927, page 6.
  • "Soil 'Mining' Tragedy: U. of I. 'Monument' Marks Fate of Exhausted Ground as a Warning", 16 May 1928, page 7.
  • "The world's oldest...", 4 January 1955, page 7.
  • "Golden Nuggets", 1 November 1955, page 3.
  • "Corn Experiment Results Announced by University", 5 February 1957, page 1.
  • "Report to Farmers", 16 June 1967, page 6.
• Urbana Daily Courier
  • "Business Men of the Twin Cities to Visit Experiment Station", 15 July 1907.
  • "Do We Really Believe in Rotation of Crops", 26 January 1922, page 4.
  • "Farm Topics", 22 June 1922, page 2.
  • "Farm Topics", 23 June 1922, page 12.
  • "Rotation Cuts the Cost of Production", 20 October 1922, page 8.
  • "Improper Rotation is Chief Cause of Small Crop Yields", 26 November 1923.
  • "Farmers Meet Hears Speech by Mumford", 19 February 1925.
  • "Hort. Meeting at University Comes to End", 29 July 1927, page 7.
  • "Morrow Plots Have Yielded Half Century", 31 January 1928, page 2.
  • "'Scarecrow' on Morrow Plots is Much Alive", 3 July 1929, page 7.
  • "Education Alone Will Not Suffice", 9 June 1932, page 3.
  • "Rotation is Sure Step in Widening Next Crop Income", 5 January 1933, page 5.
  • "Dean Call of Kansas Inspects Morrow Plots", 15 August 1935, page 2.
• Wallace's Farmer
  • "The Importance of Clover", 6 February 1920, page 507.
  • "Expensive Farming Without Legumes", 8 August 1931, page 1.
  • "Level Land Fertility Losses", 25 April 1936, page 23.
  • "Workday Pointers", 10 October 1936, page 18.
  • "Squanto Used Fish", 11 January 1941, page 13.
• Weekly Pantagraph
  • "Supt. Hall's Idea of Summer Institute at Urbana", 11 March 1910, page 7.
  • "700 Farmers Visit State University", 3 July 1914, page 7.
  • "County Agriculturists at State University", 25 June 1915, page 3.
  • "University Plots", 30 June 1916, page 8.

Illinois Distributed Museum

• Jensen Rehn, "Cyril G. Hopkins", Illinois Distributed Museum.
• Jensen Rehn, "George E. Morrow", Illinois Distributed Museum.