Abstract
Effects of two different soils, Mineoka (m) and chiba (c), on the growth of ladino clover (L), red clover (R) and orchard grass (O) were investigated. It became clear that three species were more productive on m-soil which contained larger amount of available P2O5 and earthworms than volcanic c-soil. Legumes on c-soil severely suffered from summer depression, which caused the decrease of yield in the subsequent growing season. Legumes on m-soil produced greater weight of root than that on c-soil. Roots of legumes on m-soil showed higher respiration and decayed slowly than those on c-soil. Sod-bound of orchard grass was formed on c-soil but not formed on m-soil.
