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。
"Sixteen years counts as a long term experiment," explains Russell Hand of the University of Sheffield in England.
“16年就已经算是长期的实验了，”英国谢菲尔德大学的拉塞尔•汉德解释说。
"Sixteen years counts as a long term experiment," explains Russell Hand of the University of Sheffield in England.
“16年就已经算是长期的实验了，”英国谢菲尔德大学的拉塞尔•汉德解释说。
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