M for the Swedish terms mo (very fine sand) and mjäla (silt).

(as per An Introduction to Geotechnical Engineering by Holtz and Kovacs, 1981)

Ronald R. Tidball has written:

'Chemical variation of soils in Missouri associated with selected levels of the soil classification system' -- subject(s): Classification, Composition, Soil chemistry, Soils

lulla soil

The NRCS Soil Classification System recognizes 11 distinct soil orders: oxisols, aridsols, mollisols, alfisols, ultisols, spodsols, entisols, inceptisols, vertisols, histosols, and andisols.

1.igneous soil

2.sedimentary soil

3.metamorphic soil