这意味着表层土壤几只含有少量长期成功耕作所必需的成分。
This means topsoil contains few of the ingredients needed for long-term successful farming.
在长期从事耕作的地区（底海拔地区），人们用火把农作物残渣烧掉，清理出土地为下一个生长季节做好准备。
In permanently cultivated (usually lowland) areas, fires are used to burn crop residues and get the land ready for the upcoming growing season.
以致在50岁时，在河南故乡土地上长期的辛劳耕作让他的手臂留下了绳索的烙印。
Even at age 50, the rope of muscles on his arms bespoke a lifetime of hard plowing and harvesting in the fields of his native Henan Province.
牛因为这个缘故，长期以来一直成为人的使用工具，任劳任怨，勤于耕作，辛勤劳动。
Cattle For this reason, has long been a person's use of tools, hard working, diligent in farming, hard work.
通过田间长期定位试验，探讨了耕作措施对农田黑土耕层水分的影响。
This study determined infiltration into soils on black farmland under different tillage systems by long-term experiment.
很少人能够真正理解大量使用化学物品的单一耕作农业所造成的短期和长期的影响。
Very few people have a true understanding of the short and long term impacts of chemical-intensive monoculture style of farming.
经过长期的耕作利用，培育了大面积的肥沃土壤。
A great area of fertile soil was formed by the long-term cultivation and utilization.
土壤耕作可改变土壤环境，但耕作方式对冬小麦品质的长期影响仍有待于进一步研究。
Soil tillage changes the soil environment. But the effect of long-term soil tillage on kernel quality of winter wheat needs further research.
本实验是在十年研究的基础上，在华北地区小麦—玉米典型耕作制度下，对土壤长期施用EM生物有机肥，研究其对冬小麦和夏玉米的生产效果与作用机理。
The production effects and action mechanism of applied EM biological-organic fertilizer to winter-wheat and summer-maize under the typical cropping systems of the Huabei area in china were analyzed.
本实验是在十年研究的基础上，在华北地区小麦—玉米典型耕作制度下，对土壤长期施用EM生物有机肥，研究其对冬小麦和夏玉米的生产效果与作用机理。
The production effects and action mechanism of applied EM biological-organic fertilizer to winter-wheat and summer-maize under the typical cropping systems of the Huabei area in china were analyzed.
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