TY - BOOK AU - SACHDEVA, Prabh Dayal TI - Genesis geochemistry and clay mineralogy of the soil series of Punjab Agricultural University Farm, Ludhiana U1 - T 631.41 S11G PY - 1973/// CY - Ludhiana PB - P.A.U KW - SOILS -- ANALYSIS KW - MINERALOGY. GEOCHEMISTRY KW - PEDOGENESIS KW - PEDOLOGY KW - SOILS KW - SOILS -- COMPOSITION N2 - The different size fractions and total sand to silt ratios indicate that the parent materials of some soil profile series are uniform Increases in clay content witl1 depth of the profiles of all the series fomn a bulgo mostly in the B horizons and then a ER -