There was positive correlation between nitrate content and nitrogen fertilization application level, in the field culture relative coefficients are follows: Chinese cabbage r=0.9629**, spinach r=0.9538*,lettuce r=0.9551*;是什么意思_There was positive correlation between nitrate content and nitrogen fertilization application level, in the field culture relative coefficients are follows: Chinese cabbage r=0.9629**, spinach r=0.9538*,lettuce r=0.9551*;在线翻译_英语_读音_用法_例句