Changes in non-waterlogged soil air carbon dioxide (CO 2) concentration were studied in a rice-wheat rotation ecosystem of southeast China.
通过同步观测耕层土壤空气CO2 浓度廓线、土壤温度和土壤含水量 ,主要研究和讨论了华东地区典型稻麦轮作农田旱地阶段的土壤空气CO2 浓度的变化规律 ,及土壤温度和含水量对它的影响。
Such CO2concentration in the soil air was still suitable for crop growth.
在玉米生育期内测定了０～１００ｃｍ土层土壤空气组成、土壤通气状况的呼吸强度。
Study on Soil Air Reduction Infiltration Characteristics under Different Irrigation Method;
不同灌溉方式入渗条件下的土壤空气阻渗特性试验研究
Air, water and soil are nonliving things.
空气，水和土壤是非事物。
waste matter that contaminates the water or air or soil.
污染水、空气或土壤的废物。
raw materials taked from the soil and air
在土壤和空气中得到的原料
Pollution hurts the Earth's land, water and air.
描述:污染对土壤、资源和空气造成破坏。
Creative Education Needs Air,Soil and Water;
创新教育需要“空气”、“土壤”和“水分”
Experimental study of the air entrapment effects on soil structure and infiltration
土壤中空气对土结构和入渗过程的影响
Given earth, air and due temperature, the plant must grow.
有土壤，空气和适宜的温度，植物一定会生长。
The very thin coverings of air, soil and water
由空气、土壤和水组成的非常薄的覆盖层
Air, water and soil are parts of our environment, too.
空气，水和土壤也是我们的环境的一部份。
Sometimes the air chamber above the soil sample is connected to a regulated pressure source.
有时，土壤试样上面的空气箱与调压源相连接。
Mulch provides a thick barrier between the soil and the air.
农地膜作为土壤和空气中得一层薄的隔离。
Study on the Soil Dust Profiles for Source Apportionment of Ambient Particulate Matter;
城市空气颗粒物源解析土壤风沙尘成分谱研究
Determination of Chloropicrin in Soil by Headspace Gas Chromatography
顶空气相色谱法测定土壤中氯化苦残留
They improve air and water quality; trees stabilize the soil and prevent erosion.
他们能净化空气，涵养水源；他们的根可以保持水土、止土壤腐蚀。
A space in air, water, or soil containing pollutants released from a point source.
含污染质的空气空气、水或土壤中含有从一个点状源释放出的污染物的空间
Something that pollutes, especially a waste material that contaminates air, soil, or water.
污染性物质造成污染的物质，尤其指一种污染空气、土壤或水的废物
fine powdery material such as dry earth or pollen that can be blown about in the air.
细小的粉末状材料，如干燥的土壤或花粉，在空气中能被吹起。