The 1959 Iowa Corn Yield Test
Auteur : Charles D. Hutchcroft, Joseph Lee Robinson, R. D. Ingledue
Date de publication : 1960
Éditeur : Iowa State University of Science and Technology
Nombre de pages : 20
Résumé du livre
"This bulletin is the report of the fortieth annual Iowa Corn Yield Test. Similar tests have been conducted every year since 1920." -- p. 3