登入選單
返回Google圖書搜尋
The 1957 Iowa Corn Yield Test
Charles D. HutchcroftJoseph Lee Robinson
出版Agricultural and Home Economics Experiment Station, Iowa State College, 1958
URLhttp://books.google.com.hk/books?id=6h0iAQAAMAAJ&hl=&source=gbs_api
註釋"The Iowa Corn Yield test has been conducted annually since 1920. The main purpose of this test is to provide information that will help Iowa farmers select seed of hybrids best adapted for the area in which they live. This bulletin reports the performance of hybrids tested in 1957. Also shown are comparisons of hybrids tested for 2-year, 3-year and 4-year periods." -- p. 3