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黑钙土
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黑钙土
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农学
黑钙土
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Chernozem
黑钙土
温带半干润气候地区草原植被条件下形成的,表层具有深厚腐殖质层、下部具有钙积层或石灰反应的土壤。在中国土壤系统分类为均腐土纲,半干润均腐土亚纲;在美国土壤系统分类中,黑钙土属于软土纲的多种类型:冷冻性冷凉软土、黏化冷冻软土、钙化冷凉软土、黏化半干润软土、弱发育半干润软土、钙质半干润软土等。
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groundwater pollution shielding technology
groundwater pollution source removal technology
groundwater quality
groundwater quality criterion
groundwater quality fast detecting meter
groundwater quality monitoring
groundwater quality monitoring and analysis
groundwater quality pollution monitoring
groundwater quantity monitoring
groundwater radio activity analysis
groundwater recharge
groundwater regime
groundwater remediation
groundwater reservoir
groundwater resource
groundwater resources evaluation
groundwater resources of China
groundwater resources protection
groundwater runoff
groundwater seepage flow
groundwater seepage velocity
groundwater simulation
groundwater source field
groundwater steady flow
groundwater-surface water interaction
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