Quality impacts of irrigation on soil properties and yield of pistachio in plain Robat Shahrbabak

Shahr-e Babak’sDasht-e Robat is one of the important areas prone to cultivate pistachio in Kerman province. In the past three decades، the excessive use of groundwater resources، high evaporation، and recurrent droughts have caused the poor quality of irrigation water. Irrigation of pistachio gardens with saline waters has adverse effects on soil properties and yield of pistachio. This research has been done to examine the effect of the use of irrigation water with different quality on the characteristics of the cultivated lands and yield of pistachio. First، 16 water source with different quality were sampled by evaluating the results of the analysis of irrigation waters and soil maps; and some profiles were also digged، described and sampled in the gardens. In addition، managerial questionnaires were provided for the gardens studied. The results show that the chemical properties of soil are more influenced by the quality of irrigation water، compared to physical parameters and fertility Studies showed that with increasing salinity، more than 10 dS/m is much reduced performance. West Plains، so the performance is very low and some orchards have been abandoned. Soil salinity in the West region of the higher 30 dS/m. Greatest accumulation of salts in the second and third layers were observed. The yield per unit area from East to West Plains، but much lower salinity، sodium absorption ratio، anions and cations is increased and exceeded. So in pistachio orchards and leaching of soil salinity management isessential