草畜培肥地力
Fertilized soil by herbaceous and manure
长周期动力地形模拟
longterm morphodynamic modeling
长周期动力地形模型
long-term morphodynamic model
地力保持
Maintenance of soil-fertility
Preservation of fertility
地力分类
land capability classification
地力贡献
Contribution of soil fertility
地力贡献率
Contribution rate of soil
fertility rate
contribution rate of field fertility
percentage of soil fertility contribution to crop yield
地力评估
soil fertility evaluation