With water being one of the most expensive inputs of the rice producer, utilizing methods to limit the amount of water used makes economic sense.
Adoption of multiple inlet irrigation has allowed producers to reduce water consumption. Water use with multiple inlet has translated into an 18% (fig.2) reduction in water cost over straight levee production practices, while reducing the time for flood establishment, reducing nitrogen loss and improving herbicide activation. But without proper management multiple inlet will not translate to dollar savings. If the multiple inlet field is manage properly, utilizing the proper number of gate valves per paddy, proper height of levee gates, levee seepage is accounted for, the field should flood up evenly from top to bottom at the same time. Producers need to be aware that multiple inlet will not prove profitable if one is over pumping, improper scheduled pumping, or maintaining excessively deep water levels. Link to Complete Article