Modification of M. B. RUSSELL'S Method for Measuring Low-Suction Pore Distribution in Soils

Abstract

In 1942,M. B. RUSSELL proposed an apparatus for measuring low-suction pore distribution in soils, however, it has some disadvantages in operation, especially when used for loose soils having much large pores. The authors gave some modifcations to this apparatus as shown in Fig. 1. Through these simple modifications the disadvantages have been overcome and a lighter liquid such as CCl_4 (for cheaper one) are used satisfactory to obtain as high as 150 cm height of water column. Furthermore, it is clarified that RUSSELL's method to measure a suction force from the center of soil column is incorrect and it must be measured from the upper most surface of soil column.