So the soil agro-ecological system has a strong protective effect on soil fertility.
农田生态系统对土壤肥力具有较强的保护作用。
2
The method of agro-ecological region by FAO is used to calculate the productive potentialities and population bearing capacity of land in Mancheng County, Hebei Province.
本文采用联合国粮农组织的农业生态区域法计算了满城县的土地生产力及人口承载力。
3
Based on the agro-ecological practice in Liuminying villang, Daxing County the relationship between eco-agriculture and the development of green food was discussed in this paper.