研究了稳定耕作系统下的不同利用方式的高原山地红壤肥力变化特征。
Study on the different characters of upland red soil fertility under steady cultivation systems by different utilizations.
布莱克说：“他们提高了生产效率，改良了作物品种，并运用诸如免耕直播及全球定位系统等手段改进耕作方式。
They are getting a lot more efficient; they have a lot better crop genetics and agronomic practices like no-till farming and things like GPS [satellite-dependent global positioning system].
土壤流失量受人为干预、耕作强度的影响很大，坡地从自然保护到作物栽培，系统的土壤流失量提高20倍。
Soil erosion is greatly affected by artificial interference and farming intensity. The amount of soil erosion in hillside field system increases 20 times from natural protection to crop cultivation.
这个灌溉系统用作集体管理并被用于村民进行集中加强作物耕作。
The irrigation systems are designed for collective management and are used for intensive cultivation of cash crops by groups of villagers.
土槽台车试验系统对于探索农业机具的新原理、新机构、减少耕作能耗和提高作业质量是非常重要的。
Therefore the soil bin tester is very essential for exploring new principia, devising new tillage tools, reducing energy consumption and improving working quality.
译文再继续扩大耕作面积的话就会对全球生态系统产生影响。
A further expansion of farming area will adversely impact on the world's natural ecosystems.
对华北平原高产农田生态系统2004年的土壤呼吸状况进行了分析，探讨了不同耕作方式下土壤呼吸量的季节变化规律。
This study investigated variations in soil respiration under different cultivation practices on high yield farmland in the North China Plain during 2004.
这些被计划为自我维持的系统，将包括为了理想生活的每件必需品，从教育到健康和耕作到文化资源。
Those that are planned to be self-sustaining will include everything necessary for ideal living, from education to health care and farming to cultural resources.
耕作对喀斯特脆弱生态系统土壤具有重要影响，是造成土壤养分流失、退化的主要原因。
Tillage practice had important effect on soil nutrients loss and soil degradation in the fragile karst ecosystem.
其广泛的国际范围包括饲养场系统，运输，生活耕作制度和牛的生产系统对土地，空气和水的污染。
Its broad, international coverage includes feedlot systems, transport, subsistence farming systems and the contribution of cattle production systems to land, air and water pollution.
在11处土壤中，免耕系统中储存的碳水平在5处超过同样条件耕作土壤中储存的碳水平，但是仅仅早表面层（0-10cm层）如此。
Stored carbon levels in no-till systems exceeded those of the ploughed systems in five out of 11 soils, but only in the surface layer (0–10 cm depth).
土地利用、耕作、作物类型、种植密度、灌溉、施肥以及其他人为活动等，对农田生态系统土壤有机碳库的变化均能产生影响。
Land use, cultivation, crop selection, planting density, irrigation, fertilization, and other anthropogenic activities all affect the dynamics of SOC pool.
土地利用、耕作、作物类型、种植密度、灌溉、施肥以及其他人为活动等，对农田生态系统土壤有机碳库的变化均能产生影响。
Land use, cultivation, crop selection, planting density, irrigation, fertilization, and other anthropogenic activities all affect the dynamics of SOC pool.
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