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。

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They are used as fertilizer in New Zealand and as a component of soups and soy sauce in Japan.

它们在纽西兰被当作肥料，在日本则是汤料和酱油成分。

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Panicle fertilizer obviously enhanced crude protein content of matured rice grain, but the impact on the relative content of each component was not significant.

穗肥的施用明显提高了成熟期稻米粗蛋白的含量，但对各组分之间相对含量的影响不显著。

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Ammonium nitrate, a solid fertilizer composed of ammonia and nitrogen, is also a component of explosives widely used in mining.

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