The study on dynamics succession of community in degenerated steppe of leymus chinensis after shallow ploughing 退化羊草草原在浅耕翻处理后植物群落演替动态研究
2.
The study on biomass composition dynamics of community in degenerated steppe of leymus chinensis after shallow ploughing 退化羊草草原在浅耕翻处理后植物群落生物量组成动态研究
3.
A control program might involve early preplant tillage to encourage germination of the weed seeds , followed by shallow tillage prior to planting to kill the emerged weeds 这样，在耕地前想办法促使杂草萌发，随后在播种前浅耕将其杀灭。
