This is a preview. Log in through your library . Abstract Psychotria subgenus Psychotria (Rubiaceae) comprises 61 species and eight varieties of understory shrubs and small trees in Mexico and Central ...
Exotic Flowers Gardeners Are Secretly Trading Right Now. Image Source: ShutterstockGardening isn't just about trimming hedges ...
INVESTIGATIONS of the symbioses in root-nodules of legumes and non-legumes have established that nitrogen fixation occurs in the nodular tissue1. Although some reports have appeared describing the ...
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