ANBAR JOURNAL OF AGRICULTURAL SCIENCES

Abstract

Field and Ladrotary investigations of four key soil series of different topograpgic / geomorphic location (foot slope-teo slope), (concave-convex) complex slopes (8%-3%). Geograpgical direction of slope fromeast to west in Al-Gaara depression were studied.
Chemical and physical properties were studied. Results of particals size distribiution were used in application some criteria to discover natural development of B horizon and uniformity value in these soil series.
Morphological characteristics results showed found B horizon which differs in pedoginc development as (thikness, colour, structure, and clay filme) at the longe of slope and this pedogenic development in creased in teoslpe that (143SCE, 132SCE) soil series. All the ratio parameters of B horizon development showed the movement and translocation of collides in horizons of these series in teo slop fllowed by foot slope.
Uniformity value showed lithological discontinuity which are not investigated in the field. This differences could be due to in situe pedogenicprocesses resulting from the differences in total rainfull variation, seasonal fluctuation in moisture regim and sedimentary processes.