Table 5 Means for saffron and wheat-grain physical water productivities (WP_Saffron and WP_Grain, respectively), saffron, wheat grain and total economic water productivities (EWP_Saffron, EWP_Grain and EWP_Total, respectively).

Irrigation regime

 40% ET_c

0.5684^a*

0.3964^ab

0.6063^a

0.15196^ab

0.6832^a

 60% ET_c

0.5068^b

0.4412^a

0.5406^b

0.16913^a

0.6112^ab

 80% ET_c

0.4274^c

0.3366^b

0.4559^c

0.12903^b

0.513^c

 100% ET_c

0.3376^d

0.2648^c

0.3601^d

0.10149^c

0.4068^d

Source of nitrogen

 Manure

0.5117^a

0.3179^b

0.5458^a

0.12184^b

0.5979^a

 Urea

0.4084^b

0.4016^a

0.4356^b

0.15396^a

0.5093^b

Cropping system

 Mono-cropping

0.4958^a

–

0.5288^a

–

0.5166^b

 Intercropping

0.4244^a

–

0.4527^b

–

0.5905^a

Growing season

 1st

0.405^b

0.3797^a

0.432^b

0.14557^a

0.5048^b

 2nd

0.492^a

0.3385^a

0.5248^a

0.12974^a

0.5896^a

 3rd

0.4773^a

n.d.

0.5091^a

n.d.

n.d.

 4th

0.466^a

0.361^a

0.4971^a

0.1384^a

0.5663^a