6. Ear‑to‑hill selection is more efficient than ear‑to‑row selection in corn.

A direct comparison was made of the efficiency of ear‑to-row versus ear‑to‑hill selection in corn breeding. Three hundred selected ears of corn were planted ear‑to‑hill. In order to simulate ear‑to‑row procedure, 60 of these ears, taken at random, were planted in five hills each. Two of the three plants in all hills of both systems were self‑pollinated and also crossed with the single-cross tester (WF9xHy). Preliminary results of the performance of the test crosses indicate that the ear‑to‑hill technique was more efficient than the ear‑to‑row procedure.