Dear, you can follow the instruction on the following website, which also contains spreadsheet to calculate water requirement. This will let you know the parameters you  need for calculating water requirement.

http://extension.uidaho.edu/kimberly/2013/04/spreadsheets-supporting-fao-56-example-calculations/

Cheers!

Hi Tarik, try to look in FAO 56 Irrigation Book, maybe they have some information.

Dear Tarik

You may have a look at the attached paper.

karbassi

http://ajbasweb.com/old/ajbas/2012/May/54-61.pdf

hi mr. tarik,

i am attached few links. it may be useful for your research work.

www.actahort.org/books/983/983_36.htm

http://nodaiweb.university.jp/desert/pdf11/133-136_Leskovar_rev.pdf

http://www.fao.org/docrep/018/f2430e/f2430e.pdf

All the best

https://mediatum.ub.tum.de/doc/603396/603396.pdf

http://anrcatalog.ucanr.edu/pdf/7221.pdf

http://ajbasweb.com/old/ajbas/2012/May/54-61.pdf