THE EFFECT OF CULTIVATION AND IRRIGATION WATER QUALITIES ON SOME CHEMICAL PROPERTIES OF GYPSIFEROUS SOILS IN THIRTHAR REGION
ANBAR JOURNAL OF AGRICULTURAL SCIENCES,
2010, Volume 8, Issue 4, Pages 42-57
AbstractThe present study was carried out to evaluate the effects of using cereal–fallow cropping system and irrigation water quality during ten years on some chemical properties of gypsiferous soil at Al-Saglawia sector 36 Al gabel ,Al-Anbar governorate. According to free lance soil survey result, three locations were selected. The locations were differed in the quality of irrigation water which used. The survey was depended on the variation in the topographical features and natural vegetation. Eight pedons (two from each site) were cultivated, one from soil locally called (Gathini) and the second one called (Hamra),as well as ,two pedons from uncultivated soils. All sites were cultivated with wheat. Water samples were collected at every location and analyzed to
limitation its quality .The results could be summarized as fallows:-
1-Significant differences in the electrical conductivity value recorded between the two studied series G2233FXW series was 15.9% higher than G2223FXW.
2- The pH values of all studied soils was slightly alkaline and irrigation had no significant effect on this property.
3- An increase in Calcium Carbonate was recorded in the surface horizon and decreased with depth and its distribution was in contrary to gypsum distribution.
4- The soils were low in their organic matter content with a significant different between the two series ,G2233FXW was significantly 19.0% higher than G2223FXW.
5-Two distinctive layers different in their gypsum content were observed. The surface layers content lower amount of gypsum than the second horizon layer.
6-The cation exchange capacity was generally low ( 4.0 – 20.6 Cent. Charge . Kg-1 ) for all studied soils .
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