The best scheme of nitrogen fertilizer and planting density is that the application of N is 180kg/ha and the amounts of basic seedling is 20 million per hectare. The yield is 6270kg/ha under this condition.是什么意思_The best scheme of nitrogen fertilizer and planting density is that the application of N is 180kg/ha and the amounts of basic seedling is 20 million per hectare. The yield is 6270kg/ha under this condition.在线翻译_英语_读音_用法_例句