Impact of different salinity levels of irrigation water and leaching requirements on some soil chemical properties of soil and sunflower yield in Ras Sudr area, South Sinai [electronic resource].

Includes references.

Field experiment was conducted at a calcareous sandy loam soil at Experimental Station, Desert Research Centre, Ras Sudr - South Sinai. This experiment carried out to study the impact of irrigation water salinity levels under leaching requirements on some soil chemical properties (pH, ECe, and ESP) as well as sunflower yield. Three irrigation water salinities (7.2, 8.14 and 10.46 dSm") and three leaching requirements levels as fraction (0.0, 0.1 and 0.2) were used in this experiment. The increasing irrigation water salinity levels with or without leachIng requirement increased soil salinity of studied soil depth at the end of flowering and harvesting stages. Moreover, the soil salinity values of surface depth (0 - 150m) were higher than that obtained other soil depth. The obtained results indicated that the increasing leaching requirement levels with studied irrigation water salinities decreased soil salinity for the studied soil depths at the end of flowering and harvesting stages. Also, the results showed that the increasing irrigation water salinity levels with or without leaching requirement slightly increased pH value of studied soil depth at the end of flowering and harvesting stages. The increasing irrigation water salinity levels with or without leaching requirement increased ESP values of stUdied soil depth at the end of flowering and harvesting stages. The results revealed that the increasing irrigation water salinity levels significantly decreased plant height. Also,

Summary in Arabic.