Earl R. Leng

1921

• 1955 Illinois corn tests
• 1956 Illinois corn tests
• 1959 performance of commercial corn hybrids in Illinois
• 1960 performance of experimental corn hybrids in Illinois
• 1961 performance of commercial corn hybrids in Illinois
• Performance of commercial corn hybrids in Illinois, 1957
• Performance of commercial corn hybrids in Illinois, 1958
• Performance of commercial corn hybrids in Illinois, 1960