1. Abdullaev I, Molden D (2004) Spatial and temporal variability of water productivity in the Syr Darya basin, central Asia. Water Resour Res 40:W08S02
2. Adnan S, Khan AH (2009) Effective rainfall for irrigated agriculture plains of Pakistan. Pak J Met 6:61–72
3. Ahmad N (1995) Groundwater resources of Pakistan (Revised) 16B/2 Gulberg-III Lahore Pakistan
4. Ahmad S, Mulk S, Muhammad A (2002) Groundwater management in Pakistan. In: First South Asia Water Forum, Kathmandu Nepal. Pakistan Water Partnership 2002. http://pwp.org.pk/ (accessed on 23 June 2020)
5. Ahmad MD, Masih I, Turral H (2004) Diagnostic analysis of spatial and temporal variations in crop water productivity: a field scale analysis of the rice-wheat cropping system of Punjab, Pakistan. J App Irrig Sci 39:43–63