1·Fertilizer nitrogen is one of the major sources of nitrate.
而硝酸盐的一个主要来源是化学肥料。
2·Results showed that whether microbial inoculation or not increase of fertilizer nitrogen rate raised celery yield.
结果表明，无论是否接种生物菌剂，增施氮肥均有利芹菜产量的提高。
3·Urea is a nonionic fertilizer nitrogen material which has become of increasing importance in agricultural production.
尿素是一种非离子型氮肥，在农业生产上变得日益重要。
4·The study was conducted to reveal the mechanism of mineralization-immobilization turnover(MIT) of organic fertilizer nitrogen and to provide scientific references for applying manure and fertilizer.
揭示有机氮肥的矿化-固持周转过程机理，为合理施用有机肥和化肥提供科学依据。
5·Carnivorous plants are so finely tuned to low levels of nitrogen that this extra fertilizer is overloading their systems, and they eventually burn themselves out and die.
肉食性植物能很好地适应低浓度氮，因此这些额外的肥料会使它们的系统负担过重，最终它们会被压垮并死亡。
6·Farmers use nitrogen fertilizer (氮肥) to help grow bigger crops.
农民使用氮肥来帮助种植更大的作物。
7·A key component in raising American corn yields in recent decades, nitrogen fertilizer, is more expensive in Africa than in the United States, Lynch says.
几十年来，美国玉米产量提高的关键是氮肥的利用，该肥在非洲的使用成本远比在美国的要高得多，林奇表示。
8·In one coal power plant in Poland, flue gas is converted into sulfur and nitrogen byproducts that can be used as fertilizer.
在波兰的一家燃煤电厂，烟气被转化为硫和氮，这些副产品可以用作肥料。
9·Choose a fertilizer that contains nitrogen, phosphorus, and potassium.
选择含有氮，磷和钾的肥料。
10·This spring, a federal science advisory report is expected to recommend a national goal of improving the efficiency of farm nitrogen fertilizer use by 25 percent, Herz and Galloway say.
今年春天，一份联邦科学建议报告有可能建议提高氮肥使用率提高25%的国家目标。赫兹和盖洛韦说。