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The AASHTO Soil Classification System was developed by the American Association of State Highway and Transportation Officials, and is used as a guide for the classification of soils and soil-aggregate mixtures for highway construction purposes.
USDA soil taxonomy (ST) developed by the United States Department of Agriculture and the National Cooperative Soil Survey provides an elaborate classification of soil types according to several parameters (most commonly their properties) and in several levels: Order, Suborder, Great Group, Subgroup, Family, and Series.
The Food and Agriculture Organization of the United Nations (FAO) developed a supra-national classification, which offers useful generalizations about pedogenesis in relation to the interactions between the main soil-forming factors.
The Unified Soil Classification System (USCS) is a soil classification system used in engineering and geology to describe the texture and grain size of a soil.The classification system can be applied to most unconsolidated materials, and is represented by a two-letter symbol.
Tanah Datar Regency is located between two mountains, namely Mount Marapi and Mount Singgalang. This topography is dominated by hilly areas and has two-thirds of the Singkarak lake. [7] In general, the climate in Tanah Datar Regency is moderate with temperatures between 12 °C–25 °C with an average rainfall of more than 3,000 mm per year.
This subdivisions is a local level of government beneath the provincial level. However, they enjoy greater decentralisation of affairs than the provincial body, such as provision of public schools and public health facilities. They were formerly known collectively as Daerah Tingkat II (Level II Region). [14]
The Atterberg limits are a basic measure of the critical water contents of a fine-grained soil: its shrinkage limit, plastic limit, and liquid limit.. Depending on its water content, soil may appear in one of four states: solid, semi-solid, plastic and liquid.
The National Land Code (Malay: Kanun Tanah Negara), is a Malaysian laws which enacted to amend and consolidate the laws relating to land and land tenure, the registration of title to land and of dealings therewith and the collection of revenue therefrom within the States of Johore, Kedah, Kelantan, Malacca, Negeri Sembilan, Pahang, Penang, Perak, Perlis, Selangor, Terengganu and the Federal ...