Abstract
Deficiencies of Zn and Fe were found in Dark-Red alkali soil showing that the optimal application levels were 2-3kg/ha for Fe and not less than 8kg/ha for Zn. A significant defeciency of Mo for the legume growth was found in Red-Yellow acid soil in the following order ; Siratro>Greenleaf desmodium>Cooper neonotonia・Miles lotononis>Endeavour stylo・Centroeema. The positive effects of Mo application became greatest at 300-400g/ha of Mo application and at about 6t/ha of liming being attributed to the increased levels of nitrogen fixation by the root nodules. A deficiency of Mn was also found in the acid soil.
