What are the requirements for irrigating turf-grass and landscape plants?

it depends on the area you are living in for middle east i will give you the average rating for daily water requirements turf :12-15 l/sq.m/day trees :50-80 l/day ( depends on the size of the tree palm trees :100-120 l/day ground covers10-12 l/sq.m/day shrubs :8-10 l/day

at first determin the ammount of water required 

then determine the fertilizers required 

after that work on finding the most suitable irrigation system which will give the highest

percentage of the water distribution and water delivery

water requirements for grass and plants or network system requirements