Alternate Wetting and Drying Irrigation Technology for Sustainable Rice ( Oryza Sativa ) Production

The water saving technology for lowland rice cultivation was very crucial because of in the future irrigation water become scarce and competed with other sectors. The lowering of the availability of irrigation water had the impact for sustainability of rice production. The study revealed that treatment I1 attributed by the highest total water use (1646 mm) and the lowest Water productivity (0.46 kg m−3) produced the highest grain yield (7.56 t/ha). Treatment I5 and I6, on the contrary, gave the second highest yield (7.21 and 7.05 t/ha) and consequently the second highest water productivity (0.65 and 0.59 kgm−3) indicating quite a large water saving (26.6 and 35