Fig. 4 Grain yield comparison between uniform and nonuniform stands. (A) Grain yield of United 106 and Pride 116 in pure stands and their mixtures of different proportions (7:1, 6:2, 5:3, 4:4, 3:5, 2:6, 1:7) at three plant population densities at Elora in 1978 and 1979. Data from Hoekstra (1981). (B) Grain yield of uniformly sown stands and non-uniformly sown (50% plants sowed 7 d earlier and 50% plants sowed 7 d later relative to uniform stands) stands at four plant population densities averaged over 5 yr in Minnesota. Data from Ford and Hicks (1992)
