Soil carbon content increased with soil depth, and had an exponential relationship with its depth.
土壤中碳含量随土层垂直深度加深而降低,呈指数曲线相关。
参考来源 - 红松人工林碳贮量和碳分配的研究The carbon content rates of the soil layers in the aged plantations were higher than those in the young plantations.
年龄大的林分土壤各层含碳率高于相应的年龄小的林分。
参考来源 - 千年桐人工林生态系统碳库研究The release rate of carbon was bigger on the days 90,180 and 270, when the carbon content declined 9.41%, 8.15% and 24.88%.
凋落物分解180、270和360天后,其碳素含量分别下降了9.41%、8.15%和24.88%。
参考来源 - 江西大岗山毛竹林生态系统碳平衡研究Carbon content affects the strength obviously and niobium content has minor effect on strength at room temperature.
碳含量对室温强度影响明显,铌含量对室温强度影响不明显。
参考来源 - 成分和工艺对S30432钢性能的影响及强化机理研究·2,447,543篇论文数据，部分数据来源于NoteExpress
They will increasingly ask about the carbon content of their food.
他们会越来越多地关注食物的碳含量。
On the upside, agriculture can also dispose of heat-trapping gases, by increasing the carbon content of soils.
从好的方面讲，农业可增加土地有机炭的含量，从而将温室气体固定下来。
And California has adopted a low-carbon fuel standard that will require oil companies to cut the carbon content of their petrol.
而且加州已经通过了低碳燃料标准，要求石油公司降低他们汽油中的含碳量。
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