The influence of vesicular-arbuscular mycorrhizal fungi on the nitrogen fixation of nursery-grown Ethiopian acacias estimated by the 15N natural abundance method
1993 ◽
Vol 124
(3)
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pp. 473-479
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1989 ◽
Vol 112
(2)
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pp. 205-214
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1994 ◽
Vol 59
(1)
◽
pp. 69-73
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1993 ◽
Vol 59
(3-4)
◽
pp. 193-206
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