Abstract: This field experiment was carried out at Khon Kaen University on Yasothon soil series (Oxic Paleustults soil) in late July to early November, 1998 to investigate the effects due to genotypes on growth, yields, industrial baby corn yields and kernel yields of the crop plants. The commercial maize cultivars being used were KU #1, SW 2, SRC 6, Baby corn #1, G 5414, KKU 922, CMB, and SSW. They were used as treatments and the design being used was a Randomised Complete Block Design with four replications. The results showed that total dry weights, stem dry weights, leaf dry weights, leaf areas and Brix values per plant were somewhat inconsistently found particularly total dry weights during the early growth period but subsequently became similar for all treated cultivars whilst crop growth rate (CGR) increased with time to the second interval and then a decline yet no trend due to treatments was shown. Leaf area indices were not up to optimum whilst kernel yields for the tested cultivars were ranging from 2,694 to 6,600 kg ha -1 for SSW and Baby #1, respectively. However, industrial baby corn characters were ranking at the highest rated scores with KKU 922 followed by G 5414, SW 2, SRC 6, CMB, KU #1, SSW, and Baby corn #1, respectively while commercial baby corn yields were highest with G 5414 followed by KU #1, Baby corn # 1, KKU 922, SW 2, CMB, SRC 6 and SSW with the yields of 442, 408, 407, 402, 398, 393, 357 and 352 kg fresh weights/hectare, respectively. KKU 922 cultivar was predominantly shown its outstanding features for further experiments.