Nitrogen is one of the three essential nutrients in the terrestrial ecosystem and is regarded as a main limited factor in the forest ecosystem.
氮是陆地生态系统中三大营养元素之一，在森林生态系统中被视作主要的限制生长因子。
Under the irrigation conditions at present, the main limited factor of productivity is soil quality.
在现有灌溉条件下，土壤质量是制约生产力的主导因子。
The lower limited factor is introduced to the process of extraction, which improves the definition of extracted watermarking effectively.
提取时下限因子的引入，有效地提高了提取水印的清晰度。
Al toxicity is a major limited factor for crop production and quality in acid soil, and it has become the focus of ongoing research in the area of plant stress physiology and genetics.
铝毒是酸性土壤影响作物生长的主要原因，已成为植物胁迫生理学与遗传学的重要研究内容。
The pollution by heavy metals was a Limited factor for the water resources use.
黄河流域重金属污染是水资源利用的一个制约因素。
The pollution by heavy metals was a Limited factor for the water resources use.
黄河流域重金属污染是水资源利用的一个制约因素。
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