The 1948 Iowa corn yield test
1949
Hutchcroft, Charles D. | Robinson, Joe L. (Joseph Lee)
"This bulletin is the annual report of the Iowa Corn Yield Test. This test is conducted by the Iowa Corn and Small Grain Growers' Association in cooperation with the Iowa Agricultural Experiment Station. The purpose is to compare the performance of many hybrids being offered for sale to farmers. We hope that information in this bulletin will help you to choose the best hybrids for planting in 1949"--Page [233].
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