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Correspondence analysis (CA) of relationships between disease control treatments and identified dominant N2-fixing bacteria in the rhizosphere of both chickpea cultivars in 2008 (a) and 2009 (b), as revealed by nifH gene. C: control; I, II and III: increasing intensity of fungicide application; V: CDC Vanguard; L: CDC Luna; Numbers correspond to the identified N2-fixing bacteria shown in Table 2. P=0·014 in 2008, P>0·05 in 2009, N = 32.
