Each year Iowa farmers are faced with the problem of choosing adapted hybrids for their farms. The appearance of the seed in the bag is an inadequate measurement of value. The real test of value comes from an unbiased measure of performance of hybrids that are offered for sale. The purpose of the Iowa Corn Yield Test is to give you this kind of information. This test is not a “contest” . There are no prizes or awards. It is a test to measure differences among hybrids. W e hope the data presented in this bulletin will help you to select the best adapted hybrids available for planting in 1951.

The Iowa Corn Yield Test is conducted annually by the Iowa Corn and Small Grain Growers’ Association in cooperation with the Iowa Agricultural Experiment Station.