Abstract
Effect of gypsum (calcium sulfate) application on the root growth, yield and yield components of field grown soybean cv. Enrei was discussed. Three fields with different gypsum application were used in this experiment. There was no significant difference in the grain yield among the fields. The sum dry weight of fiber roots and branch roots per 1-m ridge in a consecutive three-year gypsum application plot was significantly larger than those of other plots.
