... the system of Ha Nam. 10–open-dried combined with rain water reserve. This is a basis forselection regimes in irrigated fields to reduce water, reduceconsumption water in Ha Nam province. Potential ... a total area of 85,958hectares, population of 785,057 people. Irrigation system is almost bydynamic. 2.1.2 Distributional rule of rainfall in the research area Analyzing rain documents of ... α.3.2.2 Content of experimental arrangement Placement of experiment in Liem Tiet, Thanh Liem, Ha Nam. Experiment time from the Harvest reason in 2005 to Spring Season in2007.Experiments with...