نتایج جستجو برای: per capita arable land
تعداد نتایج: 549468 فیلتر نتایج به سال:
A system dynamics method to assess carrying capacity of a defined natural environment is presented. The proposed method seeks to relate per capita resource usage to ranges of population and per capita consumption beyond which the system is not viable relative to population dependent resource constraints. It provides a platform to investigate system behavior through system dynamics simulations w...
Along with industry upgrading and urbanization, the agricultural in China has been experiencing a stage of rapid development, on bright side. On other side, ecological environment deterioration resource scarcity have become prevalent. Called by current situation, circular agriculture arises as direction for to achieve sustainable development. This study develops an evaluation indicator system u...
Diffuse phosphorus (P) export from agricultural land to surface waters is a significant environmental problem. It is critical to determine the natural background P losses from diffuse sources, but their identification and quantification is difficult. In this study, three headwater catchments with differing land use (arable, pasture and forest) were monitored for 3 years to quantify exports of d...
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