Variability in nitrogen fixation of common bean (Phaseolus vulgaris L.) intercropped with maize
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2001 ◽
Vol 14
(1)
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pp. 1-12
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2007 ◽
Vol 24
(7)
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pp. 1187-1193
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2010 ◽
Vol 1
(1)
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pp. 23-27
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1998 ◽
pp. 117-125
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