1AMARA D S,KAMARA A Y,TUCKER T.Rhizoba and nodulation assessment of nitrogen fixing trees in Sierra Leone[J].J Appl Sci,1995,4:41-47.
2BROCKWELL J,BOTTOMLEY J P,THIES J.Manipulation of rhizobia micro flora for improving legume productivity and soil fertility:a critical assessment[M].Plant Soil,1995,174:143-180.
3CRAIG G F,ATKINS C A,BELL D T.Effectiveness of salinity on growth of four strains of Rhizobia and their infectivity and effectiveness on two species of Acacia[J].Plant Soil,1991,133:253-262.
4HAYNES R J,WILLIAMS P H.Nutrient cycling and soil fertility in the gazed pasture ecosystem[J].Adv Agron,1992,49:119-199.
5GITONGA N M,SHISANYA C A,HORNETZ B,et al.Nitrogen fixation by Vilna radiate L.Wilczek in pure and mixed stands in SE-Kenya[J].Symbiosis,1999,27:239-250.
10Venora G,Grillo O,Ravalli C. Identification of italian landraces of bean (Phaseolus vulgaris L.) using an image analysis system[J].Scientia Horticulturae,2009,(04):410-418.doi:10.1016/j.scienta.2009.03.014.