From my experience you rubbed the soil sample in dry stage you could estimate the % of sand then moist the sample you can determine the % of clay fraction so the rest of the 100 % is the silt %, then you look to the textural triangle you get the type of Texture in the field.
With my regards
Prof. Abughanem Abdulellah
Edited 1 time(s). Last edit at 03/02/2018 10:39AM by ttcf.