ROCK FRAGMENT CONTENT AND FINE SOIL BULK-DENSITY

The effect of rock fragment content on the fine soil bulk density is i nvestigated and a relation is proposed. Such a relation is an extensio n of an algorithm that allows the estimate of soil bulk density when r ock fragments are not present. A comparison between measured and predi cted data has been made using the equation proposed here and Rawls' al gorithm that calculates fine earth bulk density. A nomogram has been c onstructed for transforming rock fragment content from a by-mass to a by-volume basis and vice versa. Such a nomogram allows the comparison of data on rock fragment content expressed in different units.