Economic fertility of soil is a combined formati on of artificial and natural fertility.
土地肥力是土地的客观属性 ;土地肥力包括了许多要素 ;具有肥力的土地是农业基本生产资料 ;土地自然肥力是自然历史过程的产物 ;土地经济肥力是人工肥力和自然肥力的统一体 ;科学技术在土地肥力发展中起着十分重要的作用 ;自然土壤向农业土壤的转化和发展 ,是人类生活和生产发展的必然产
The research made a use of the earthworm with a competition of natural fertilizer to study the influence of the two treatments to the ammonia yield in livestock excrement.
该试验利用蚯蚓生物处理方法,同自然堆肥作对比试验,研究了两种处理对畜禽粪便氨气产量的影响。
Higher yields obtained take up more nutrients which have to be replaced to sustain high yields even in soils with high natural fertility.
较高的产量需要更多的养分来补充，即使在自然肥力高的土壤上也是一样。
Study on the Relationship between Soil Microbes and Soil Fertility in Paddy Fields of Long-term No-tillage and Ridge Culture;
自然免耕稻田的土壤微生物与肥力关系研究
Assessment on Effects of Forest Succession on Soil Fertility in Xinglongshan Mountain National Nature Reserve,Gansu Province
甘肃兴隆山自然保护区森林演替对土壤肥力影响的评价
vis medicatrix naturae [ medi5keitriks nei5tju:ri: ]
【医】自然治愈力, 自愈力
The islands being wholly of volcanic origin, the soil is necessarily very rich.
岛上全是火山地带，土质自然非常肥沃。
physical force or magnetic attraction found in nature
（自然界的）力,磁力,引力
Weight reduction intervention and self-care ability of children with simple obesity
单纯性肥胖儿童的减肥干预和自我护理能力
self-restoring capacity of nature
自然的自我恢复能力
Genotypic difference in Inbred Iines of Maize on Fertilizer Effect
玉米自交系对肥力反应的基因型差异
Jiangjin is in the subtropical monsoon climate zone, with fertile land and ahundant natural resources.
江津属亚热带季风气候，土地肥沃，自然资源丰富。
Under natural conditions, the incubation period in feedlot cattle is uncertain in length.
在自然条件下，肥育舍饲牛的潜伏期，还没有确定。
Ecological Observation on Pachytriton Labiatus in Nanling Nature Reserve of North Guangdong;
广东南岭国家自然保护区无斑肥螈的生态观察
Research on the Dynamic Change of the Microbial Community in the Process of Naturally Composting
自然堆肥过程中微生物群落的动态变化
Change of Soil Fertility in Pinus sylvestris var. mongolica Natural Forest in Sandy Land
沙地樟子松天然林土壤肥力变化的研究
For this reason, China will continue to make great efforts to expand its chemical fertilizer production and raise the self-sufficiency rate of chemical fertilizer. By 2000 China will be basically self-sufficient in nitrogenous fertilizer.
今后，中国将大力发展国内化肥生产，提高化肥自给率，到2000年做到氮肥基本自给。
suggesting the operation of supernatural influences.
表明超自然力影响的。
physical capacity of the natural environment
自然环境物质负荷能力
He was making a visible effort to control himself.
他显然在努力控制自己。