These percentages rise during intensified security closures, when many of the workforce are unable to travel. The main non-irrigated crops are olives, fruit trees, grapes and almonds.
Irrigation is necessary for the production of citrus fruits, soft fruit and vegetables.
The PA also has powers to raise taxes. Palestinians are theoretically able to import through Israel and from other Arab countries and export most agricultural goods to Israel, although this is severely restricted during intensified closures.