但施用饼肥对上等烟比例的影响有所不同。
But the effect of applying cake fertilizer on supper tobacco rate is different.
氮用量和密度对均价、上等烟比例影响不显著。
The average price and the high class leaf rate were influenced insignificantly by nitrogen rates and density.
稻草还田提高产量、中上等烟、均价，从而提高产值和净效益。
Straw returned to field could increase nicotine content in upper leaves while decrease that in lower and middle leaves.
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