Abstract:A clay capsule is one of the porous pipes in a sub-irrigation system that can release water near the root zone. This paper has attempted to improve the physical and hydraulic properties of clay capsules based on changing the percentage of organic matter in the raw materials. The raw material used for making clay capsules is obtained from the calcareous soil of Nasr Abad village of Gorgan, Iran. The ratio of rice bran to calcareous soil as improving hydraulic properties was 1:2, 1:5, 1: 10, 1:15, and 1:20 (kg o… Show more
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