甘蔗是重要的糖料作物和能源作物，在甘蔗栽培中，氮肥和水分是两个最重要的因子。
Sugarcane is an important sugar and energy crop. In sugarcane production, nitrogen fertilizer and water are two most important factors.
柑桔是世界最重要的经济作物之一，在热带和亚热带地区广泛栽培。
Citrus is one of the most important fruit tree crops and widely cultivated in the tropical and subtropical areas in the world.
油菜是我国最主要的油料作物之一，甘蓝型油菜是油菜中最重要的栽培种。
The oil seed is one of the most important oil crops and Brassica napus is the mainly cultivar in our country.
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