in the gradient level, the degree of aging oasis soil and soil fertility level of villages to cities and towns as the center of a concentric circle.
在水平梯度下,绿洲土壤熟化程度与土壤肥力高低以村落城镇为中心呈同心圆分布。
参考来源 - 土壤有机质及全量养分变异特征研究·2,447,543篇论文数据，部分数据来源于NoteExpress
In a word, we conclude that (1) : the soil fertility level was greatly influenced by the Long-term local addition of fertilizer, especially by the farmyard manure.
总之，我们可以得出以下结论：(1)：长期不同施肥对土壤肥力水平影响很大，尤其是长期施加厩肥。
From the point of view of soil comprehensive fertility and considering the dependence of crops on the fertility factors, the results of quantitative study of the soil fertility level are shown.
从综合肥力的观点出发，结合作物对各肥力因素的依赖程度，对土壤肥力水平进行了定量研究。
The experiment assumed two kinds of the rice soil of different fertility level.
试验是采用肥力水平不同的两种水稻土进行。
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