تأثير الاستصلاح على صفات و تصنيف بعض ترب منطقة الرحاب في محافظة المثنى

Abstract EN

The Rehab area is important areas in the province of Muthanna this due to the content of the fertile soils of high productivity for various crops, because of importance of this region, the area of the broad and the lack of pedology studies of the area, this study was conducted to provide a database for the soils of this region through the study of some physical and chemical characteristics and morphological as well as classification of soil.

The description morphological indicated that the soils study showed a difference in the morphological and textural situation, particularly in the type and thickness and the nature of the order of prospects constituent, due to the impact of dry weather conditions that helped the formation of soils related to these conditions in addition to the effect of the case of use of the land, which affected the nature of the diagnostic horizons existing ones horizon Salic as well as its impact on some morphological characteristics such as soil building and the distribution of the roots and porous.

The soils under this study did not show a certain pattern of distribution with depth in pedons soils, which all reflecting the weakness pedogenic processes responsible for the formation prospects of earning mud as a result of drought conditions and the nature of the limestone material and highty salinity levels in soils, and the sovereignty was for unbroken sand, silt and mud for all pedons study, the sand content was ranged between (560.0-900.0) gm.kg-1.

The results indicated that pedons under the study has a high saline content which contributed to the formation of diagnostic prospects salt-type Salic, especially pedons soil is reclaimed, which reached the EC values to (168.0) ds.m -1 while there was a decreasing salt content in reclaimed and cultivated soil.

This case showed the role of agriculture and reclamation of soils to reduce salinity levels in soils under study which reached lower levels (3.1) ds.m -1 in the cultivation period reached to 15 season as if the case of soil pedons (7).

Pedons study was showed pattern pedogenic movement of the cabonat metals from the prospects to under surface prospects and to a level that provides the conditions for limestone Calcic horizon which reflecting the impact of the processes of removing tartar and tartar, the carbonat metals content in the soils under the study was ranged (85.0 -460.0) gm.kg-1.

The results also showed that the soils study showed relatively sophisticated in spite of the dry conditions of the area and the soil within the rank Aridisols because it is located within the dry desert areas with moisture from the system type Aridic.

It was diagnosed under Title Salids in soils is reclaimed for the existence of the horizon diagnostic salt type Salic, and Great Group Haplosalids and sub order Calcic Haplosalids Group for the existence of the horizon Calcic as for soils reclaimed.

The Vozart results of the study it is located within sub order Title Calcids to the presence of the horizon Calcic and was showed Great Group Haplocalcids and sub order the great group Typic Haplocalcids