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A Quaternary clay deposit in Estonia, laid down about 400,000 years ago. Clay is a type of fine-grained natural soil material containing clay minerals [1] (hydrous aluminium phyllosilicates, e.g. kaolinite, Al 2 Si 2 O 5 ( OH) 4 ). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities ...
Nhất Hạnh was born Nguyễn Xuân Bảo on 11 October 1926, in the ancient capital of Huế in central Vietnam. [ 13][ 7][ 14] He is 15th generation Nguyễn Đình; the poet Nguyễn Đình Chiểu, author of Lục Vân Tiên, was his ancestor. [ 15] His father, Nguyễn Đình Phúc, from Thành Trung village in Thừa Thiên, Huế, was ...
Soil. Soil, also commonly referred to as earth or dirt, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support the life of plants and soil organisms. Some scientific definitions distinguish dirt from soil by restricting the former term specifically to displaced soil.
Clay cannot be resolved by optical microscopes as its particles are 0.002 mm (7.9 × 10 −5 in) or less in diameter and a thickness of only 10 angstroms (10 −10 m). [16] [17] In medium-textured soils, clay is often washed downward through the soil profile (a process called eluviation) and accumulates in the subsoil (a process called ...
Notable awards. S.E.A. Write Award 2010. Nguyễn Nhật Ánh (born May 7, 1955) is a Vietnamese author who writes for teenagers and adults. He also works as a teacher, poet and correspondent. His works include approximately 30 novels, 4 essays, 2 series and some collections of poems. He is regarded as one of Vietnam's most successful writers.
Background. The project of land reform in North Vietnam was a product of the interplay of complex internal and external factors. On 9 March 1945, several years after occupation in Indochina, Japan instigated a military coup, overthrew the Vichy French administration in Indochina and established a puppet indigenous government headed by Tran Trong Kim and Bảo Đại.
Soil types by clay, silt and sand composition as used by the United States Department of Agriculture. Loam (in geology and soil science) is soil composed mostly of sand (particle size > 63 micrometres (0.0025 in)), silt (particle size > 2 micrometres (7.9 × 10 −5 in)), and a smaller amount of clay (particle size < 2 micrometres (7.9 × 10 −5 in)).
The most common engineering classification system for soils in North America is the Unified Soil Classification System (USCS). The USCS has three major classification groups: (1) coarse-grained soils (e.g. sands and gravels ); (2) fine-grained soils (e.g. silts and clays ); and (3) highly organic soils (referred to as "peat").