Department of Agricultural Chemistry, Soil Science and Biochemistry, Orissa University of Agriculture and Technology, Bhubaneswar, Orissa, 751 003.
* Present address: Water and Land Management Institute, Pratapnagari, Te1engapenth, Cuttack, Orissa, 753 051.
In the culturable command area (CCA) of 200 ha in the head reach of left main canal of Kuanria irrigation project, Dasapalla, in the district of Nayaragh, Orissa, four soil series, viz. Sariganda 1 loam (Udic Ustochrept), Sariganda 2 clay loam (Udic Ustochrept), Neliguda sandy loam (Typic Haplustalf) and Patharpunja loamy sand (Aquic Ustifluvent) were identified. Based on fifteen characteristics pertaining to soil, topography and drainage conditions under subhumid climate the above soils were classified into four soil and land irrigability sub-classes. Shallow water table, imperfect drainage, low available water capacity and mild alkalinity are some of the limiting factors for sustainable use of irrigation water.
Soil series, irrigability, sub-class, irrigability management unit
