|Author:||Hao, AiMin ; Marui, A. ; Haraguchi, T. ; Nakano, Y.|
|Book Group Author:||NA|
Small water resources can be utilized more effectively in the drip irrigation system. To use limited water effectively, it is important to irrigate exactly in the root zone. First, hydraulic conductivities and diffusivities on various soil types were studied. The experiment was performed on sand (Coastal sand), sandy loam (Masa), loam (Kuroboku, volcanic ash) and clay (Coral clay). Second, cylindrical compartment model to estimate wet bulb size was proposed. Wet bulb formations on various soils were studied with changing the irrigation intensity. Sand soil typically showed vertical elongation and light clay soil showed horizontal elongation. Loam (Kuroboku) and sandy loam (Masa) showed spherical elongations. Sandy loam (Masa) showed slightly vertical elongated shapes than Loam (Kuroboku). Third, the sizes of wetted area on the soil surface and of vertical depth were determine on specified irrigation intensities.
|Pages:||187 - 193|
|Journal:||Journal of the Faculty of Agriculture, Kyushu University|
clay soils, diffusivity, estimation, hydraulic conductivity,irrigation systems, loam soils, sandy loam soils, sandy soils,simulation models, soil types, trickle irrigation, volcanic ash soils,water use, water use efficiency, Soil Physics (JJ300), Soil WaterManagement (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management], Mathematics and Statistics (ZZ100)