الفهرس Only 14 pages are availabe for public view
 |  | from | 168 |  |  |
| | | from | 168 | | |
Abstract
A lysimeter experiment was carried out, to study the effect. of organic and inorganic soil amendments, and saline irrigation water, on some physical and chemical properties of calcareous, alluvial and sandy soils, as well as the plant
growth and its chemical composition The application of soil amendments significantly decreased the soil bulk density and the modulus of rupture, in each of surface and subsurface soils. while, salinity of irrigation water up to 6000 ppm, increased them. Soil hydraulic conductivity of surface and subsurface soils significantly increasd, under application of soil amendments with Nile water (control). While, significantly decreased with different salinity levels of irrigation water. The application of soil. amendments decreased ECe, SAR, ESP and swelling factor, while these parameters were increased with increasing salinity, levels in the irrigation water. The determined leaching fraction decreased with the application of soil amendments, relative. to the estimated leaching fraction and increased with increasing salinity levels in the irrigation water.
The application of soil amendments and salinity in the irrigation water increased the NPK availability in different soils. The saline irrigation water up to, 6000 ppm, decreased the fresh and dry weights of alfalfa and sorghum plants The efficiency of soil amendments on reducing salinity hazard on the fresh and dry weights of alfalfa and sorghum plants could be arranged as follows: (1) sulphur > town refuse > sewage sludge for calcareous soil. (2), Town refuse > sewage sludge, > sulphur for alluvial soil, and (3) sewage sludge,> town refuse > sulphur. for sandy soil. Results also showed that, the elemental sulphur was the best soil amendments ’for increasing NPK and Na content, and total uptake of alfalfa and sorghum plants cultivated in calcareous soil. While, the town refuse and sewage sludge were the best for alluvial and sandy soils.
Key words: water salinity, sewage sludge, town refuse, sulphur, soil physical and chemical properties. alfalfa. sorghum. NPK and Na content and total uptake.