Change of microflora in the rhizoplane and rhizosphere of different disease resistance soybean cultivarsⅡ.Change of microflora in the rhizoplane and rhizosphere of soybean under continuous cropping condition Change of microflora in the rhizoplane and rhizosphere of different disease resistance soybean cultivars Ⅰ.Change of microflora in the rhizoplane and rhizosphere of soybean under normal rotation cropping condition