Keywords : Soil Depth


THE EFFECT OF THE WIND EROSION IN CONTRAST THE DEPTH OF THE SOIL AND SOME OF THEIR CHEMICAL PROPERTIES IN THE EAST RAZAZAH

A. M. Raja*; A. H. Al-Bayati

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2019, Volume 17, Issue 2, Pages 181-188
DOI: 10.32649/aagrs.2022.170550

The study aims to study the effect of wind erosion and wind speed in changing the depth and some of the Chemical properties in the East of Razazah. A strip transeet of 40km long and 3km wide was selected. Three modelling sites were set on dimension 10,25 and 40 along the transset points1, 2 and3 Respectively. The result showed an increase in the depth of the soil at site 3by 7.7% compared to site 1and that the values of the reaction levels for the chain of the studies series were distributed within the range (7.3-7.5). The electrical conductivity values ranged from (2.45-3.43). The values of the exchange capacity of the cations were between (5.2-15.9 cent. Mol, Kg-1). The gypsum content is distributed in the area's soil with a range of (159.1-227.1gm kg-1). The carbonate equivalent showed a difference in the horizontal and vertical distribution in studies breeding isolates and the soil content of the component was distributed with range of (87.0-143.0 gm kg-1).

Evaluation desertification state in East Al-Haffar project

Abdulsamei J. A. Al-Hiti; Muthana K . Ibrahiem

ANBAR JOURNAL OF AGRICULTURAL SCIENCES, 2017, Volume 15, Issue 1, Pages 11-21
DOI: 10.32649/aagrs.2017.129071

A study was carried out and included ninety two soil series in east of Al-Haffar project and were distributed within sub-physiographic: Levee – basin – depression. Semi soil survey maps with scale of 1:50000 were used to cover an area of 50000 ha.
The aim of this study was to use quantitative analysis methods for information through the linkage between the curves of geographical–geological- pedological and through depending on some pedo-geo-morphological indices which include (parent material; slope gradient; soil depth and soil texture, all these indices represent soil quality index (SQI) in addition to the index of vegetation cover; index of erosion protection and index of drought resistance which represent vegetation quality index (VQI); and salinity of irrigation water; soluble chloride ion ratio and sodium exchange ratio, which represent irrigation water quality index (IWQI). All these indices used to characterize and evaluate the environmental sensitivity to desertification.
All indices were calculated by used specific mathematical equations according to the European commission system were used for rating and classification sensitivity for environmental desertification based on multiplying method between measured indices values and the maps were made for it. Results showed varied erodibility factors of wind which distributed in range of 0.09-0.37; water erodibility factor in range of 0.45 - 0.52 and soil crust factor in range of 0.08-0.73. Soil quality index varied and distributed in a range of 1.35-1.70. The areas of study were classified into three degrees and distributed from high quality to low quality. As well as vegetation quality index varied and distributed in a range of 0.07-0.26 and the location of the study was classified into four degrees, described between very low to good quality, water irrigation quality index is value of 3.35 mm and did not vary because there is only one sources of water Irrigation within the study area. In addition, the results also showed restricted three main location varied to desertification sensitivity which are classified between very low sensitive to medium sensitive.