The nitrogen, which is in ammonium in the ammonia sulfite pulping waste liquor of rice straw, is converted into organic nitrogen by using oxide-ammonium decomposition method.
稻草亚硫酸铵法制浆废液采用氧化氨解的方法，将废液中的铵态氮转化为有机氮。
Some of the old teak rice barges are still around, and a few have been converted into floating hotels.
一些运载柚木和稻米的旧时驳船仍到处可见，有的则已改装成了水上旅馆。
50 thousand square kilometers of rice fields were converted to growing vegetables and other cash crops.
五万平方千米的稻田转而种起了蔬菜及其它经济作物。
50 thousand square kilometers of rice fields were converted to growing vegetables and other cash crops.
五万平方千米的稻田转而种起了蔬菜及其它经济作物。
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