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Lime concretion black soil
释义
Lime concretion black soil
Encyclopedia
农学
砂姜黑土
释
Lime concretion black soil
砂姜黑土
发育在第四纪河湖相沉积物上的上部为暗色土层、下部为砂姜层的土壤。在中国土壤分类暂行草案(1978)中和中国第二次土壤普查(1988)时,列为半水成土纲砂姜黑土土类;在中国土类系统分类(1991)中,列为潮湿土土纲正常潮湿土亚纲砂姜黑土土类;在中国土壤系统分类(2001)中,划分成钙积潮湿变性土[注]和砂姜潮湿雏形土[注];在美国土壤系统分类和世界土壤资源参比基础(2014)中,部分相当于变性土[注]。曾称砂姜土、潜育褐土和青黑土。
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twisting frame
twisting machine
twisting moment
twisting sheaf
twisting strain
twisting strain, torsional strain
twisting stress
twisting stress, torsional stress
twist intra-molecular charge transfer
twist knot
twistless boundary
twistless towel
twistless yarn
twistless yarn spinning
twist map
twist mapping
twist mapping theorem
twist move
twist multi-filamentary composite superconducting materials
twist multifilamentary composite superconducting materials
twist number
twist of an elliptic curve
twistor
twistor correspondence
twistor equation
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