Abstract
ِAn evaluation of olive irrigation in Bashiqa area was done. Informations were collected for ten different orchards, which describe area of orchard, numbers and age of trees, and their average production. with the calculation of discharge applied to every one. Field measurements also were done to find depth of irrigation water in the year. This is compared with the calculated depth of irrigation water requirement by using CROPWAT software depending on average monthly climatological data and rainfall. The results show that the age of tree affect the productivity, also the applied irrigation water to these orchard are less than their requirements. So, it is recommended to increase the amount and frequency of irrigation water. A seasonal irrigation water depth of 400-650 mm, with an average of 100 mm during summer months, is a good choice for better production.
