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Google圖書搜尋
The 1958 Iowa Corn Yield Test
Charles D. Hutchcroft
Joseph Lee Robinson
出版
Agricultural and Home Economics Experiment Station, Iowa State College
, 1959
URL
http://books.google.com.hk/books?id=MR4iAQAAMAAJ&hl=&source=gbs_api
註釋
"This bulletin is the report of the performance of corn hybrids tested at 24 locations in Iowa during the years 1955, 1956, 1957 and 1958. Summaries of 1-year, 3 year and four year periods are shown." -- p. 3
