Soil acidification, as influenced by N-fertilizer, stubble management and crop rotations, was investigated using soil samples from a long-termrotation trial at Tarlee, South Australia.
The paper analyzes the effect of rotation and fertilization on alfalfa productivity on the Loess Plateau based on a long-term experiment.
在长期定位试验的基础上，分析黄土高原地区轮作与施肥对苜蓿生产力的影响。
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Conclusion it is in accordance with biomechanics to treat medial knee degenerative arthritis and patellofemoral arthritis due to tibial rotation, which has satisfactory longterm result.