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- natural soil fertility 自然地力
- It's an effective way to maintain soil fertility. 这是保持土壤肥力的一个有效办法。
- How do earthworms influence soil fertility? 蚯蚓如何影响土壤肥力?
- The soil fertility shows a decrease trend in cornpea rotation. 玉米、豆轮作，土壤养分均呈下降趋势。
- Influence of thinning on soil fertility in artificial forests. 抚育间伐对人工林土壤肥力的影响。
- The Impact of Soil Fertility on the Yield of Phyllanthus Emblica L. 土壤肥力对余甘子产量的影响。
- A green manure is a crop grown mainly to improve soil fertility. 种植绿肥作物主要是为使土壤更加肥沃。
- Strip check space varies with plot slope, soil fertility and irrigation. 条畦宽度随地块坡度、土壤肥力和灌溉而变化。
- Many believe artificial soils do not simulate natural soils. 许多人相信人造土并不像天然土。
- The paddy?upland system increased clay dispersion content and soil fertility. 水旱轮作可增加土壤黏粒含量,提高高沙土肥力水平;
- The status of soil aggregates is an important factor affecting soil fertility. 土壤团聚体和水稳性团聚体的状况是影响土壤肥力的一个重要因素。
- If the natural soil does not contain these proportions, it should be corrected by adding the material which is short. 如果天然土壤的组成不符合上述比例,则应掺加它所缺少的材料来进行修正。
- Natural soil is not rigid-plastic body, so limit analysis just only a semi empirical method. 然而天然土体并非刚塑性体，如果实际的土体离开刚塑性假设太远，则极限分析设计原则就只能当作一种半经验的方法采用。
- There is a high survival percentage for plant in ceramisite compared with natural soil due to its good air permeability and water penetrating ability. 干燥状态下没有粉尘，泡水后不会解体，不产生泥水，这种基质远优于大自然中的泥土。
- Application of Integrated Fertility Index Method in Evaluating Changes in Soil Fertility. 应用指数和法对潮土农田土壤肥力变化的评价研究。
- Artifical improvement of soil fertility in a regraded forest ecosystem by using municipal sewage sludge. 城市污泥对退化森林生态系统土壤的人工熟化研究。
- Effect of long-term fallow and cultivation on soil fertility in rice-based cropping system. 水旱轮作地区土壤长期休闲与耕种的肥力效应。
- The average of edaphic arsenic content by arrive high low it is respectively: Ground of blame? afforest >vegetable plot >orchard >corn field >natural soil. 土壤砷含量的平均值由高到低分别为:稻田>绿化地>菜地>果园>麦地>自然土壤。
- Robinia pseudoacacia was better than Pinus tabulae formis in enhancing the soil fertility. 在树龄相同的条件下刺槐林对土壤培肥效应优于油松林。
- According to the areca production situation and soil fertility,the investigation was carried on in Hainan. 为了海南槟榔产业稳步健康的发展,针对槟榔生产现状和槟榔园土壤肥力状况进行了调查和分析。
