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The soil erosion in TypicalRegions of Loess Plat eau are studied in this paper:(1)the main factors affecting soilerosi on are pre cipitation, topography and land use; (2)the main erosion types arte watererosio n and gravity erosion; (3)the soil erosion is
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对二龙山水库上游流域水土流失状况及自然植被情况等进行了调研,以唤起人们对土壤侵蚀状况有一个明确的认识,根据生物的适宜性进行调整,充分发挥生物与环境的最高生产力,采取有效措施和对策防止土壤侵蚀之目的。 |
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The soil erosion is effectively prevented from the project construction of the water conveyance project for Dahuofang Reservoir by taking both the project of high way reform and the river traning project as the key points; in which the measures to prevent
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摘要大伙房水库输水工程以公路改造和河道规划整治项目为着手点,利用渣料修路筑堤;根据各渣场堆放形式的不同而采取不同的防治措施,可有效地防止工程施工可能造成的水土流失。 |
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The soil had been turned up by the plough.
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那片地是用 翻的. |
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The soil has a substratum of rock.
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这土壤下面有层石头。[这土壤有下层石头。 |
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The soil here is alkaline.
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这里的土壤是碱性的。 |
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The soil is classified to tidal sandy soil, derived from river alluvium with sandy loam texture.
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土壤分类为河流冲积土发育的潮汐沙土,砂壤土质地。 |
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The soil is enriched with nitrates .
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土壤里施了硝酸盐肥料。 |
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The soil is enriched with nitrates.
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土壤里施了硝酸盐肥料。 |
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The soil is firming up now that the weather is drier.
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随着天气一天天干燥,土地越来越坚硬。 |
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The soil is too dry for planting.
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土太干了,不能种东西。 |
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The soil macro-arthropods were hand-sorted in the field. [Result] A total of 2 357 soil macro-arthropods individuals was captured and fell into 5 classes, 9 orders and 70 families. [Conclusion] The results suggest that the types of land use affect the spe
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选取吉林省中部黑土区农田、居民点园地和“三北”防护林等典型农业土地利用生境作为研究样地,于2003年7月和9月分别进行大型土壤节肢动物调查,研究大型土壤节肢动物的群落组成与生态分布。 |