Abstract
An experiment of foundation work was attempted to establish pasture on Ando soil in mountainous area which was located in the northeast of Lake Towada, Aomori Prefecture. Soil profile in this area consisted of four layers, blackish humus layer (CL, 20cm in thickness), bluish platy layer (L, 35cm), reddish friable layer (SL, 55cm) and pumice gravel layer (more than 300cm). On the foundation work for pasture, pumice gravel layer was apt to expose on the surface by cutting work because of its large thickness. Since pasture establishment on pumice gravel layer failed as reported in the previous paper, it was attempted on other two layers. Herein is reported this result. Although soils of two layers were undesirable subsoils, good pastures were established by the following applications of fertilizers and seed mixture ; basal fertilizers (kg/ha): hydrated dolomitic lime 2800, P_2O_5 400, N 50, K_2O 50, additional fertilizers: N 50, P_2O_5 50, K_2O 50, and seed mixture (kg/ha): Italian ryegrass 20, orchardgrass 20, ladino clover 20, respectively. A siries of our experiments showed that even on both cutting and banking lands with undesirable chemical properties, pasture establishment was successfully performed by means of suitable application of fertilizers, except when pumice gravel layers were exposed.
