Abstract
In the production of soiling crops, the most suitable planting density has to be determined according to the time for utilization and also to their cultivation method, because the growth habits and yields of these crops are affected by the planting density. In this report, some informations to get high production of sorghum species were obtained by applying various treatments of planting density on this crop, combining other tretments such as time of sowing, seeding methods, fertilizer, time of cutting, and height of cutting. 1. In high planting density of 15000 plants per are, the growth and the yield of sorghum sown in drill was better than those sown in space. 2. In the high-level fertilized plots, cutting at low height increased the yield, but close cutting at the beginning of internode elongation stage depressed the regrowth after cutting, resulted in the decrease of total yield. 3. Growth of the plant sown late (early July) in densed drill was quick and its yield was rather high, while its growing period was short. 4. Sowing in densed drill tended to increase the rate of leaf weight and the dry matter content.
