Abstract
1. The results here report are of 5 years experiments (1943-1947) in which α-naphthalen acetic acid and heteroauxion were applied to rice plants as growth substance. 2. The plants grown from the seeds treated by 0.05, 0.025% of solution of growth hormone 24 hours are indicated some positive effect on the growth in 1943, as well as the plants sprayed over by the solution of growth substances. 3. It has been confirmed that the treatment of seed and growing rice plants with the solution of growth substances at the concentration named, no significant inereases in the yield of rice plants have been obtaiained.
