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。
The paper analyzes the effect of rotation and fertilization on alfalfa productivity on the Loess Plateau based on a long-term experiment.
通过长期定位试验，研究不同植被覆盖与施肥管理对黑土活性有机碳库形成及碳库管理指数icm的影响。
Effects of vegetation and fertilization on black soil labile organic carbon and carbon management index (ICM) were studied in a long-term fertilization experiment.
通过长期定位试验研究了不同施肥处理对土壤物理性质的影响。
The influence of organic manure and chemical fertilizers on soil physical properties was studied.
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