Abstract
To determine whether agroforestry and silvopastoralism might be introduced more successfully into xeric or into mesic environments, the effects of isolated, mature trees of Acacia tortilis (acacia) and Adansonia digitata (baobab) on herbaceous-layer composition and productivity, soil properties, and microclimate in a moderately mesic savanna (c. 750 mm annual rainfall) were investigated and compared with an earlier study of the effects of the same two species in a more xeric savanna (c. 450 mm annual rainfall) in Tsavo National Park (West), Kenya. Similar to the more xeric site, solar radiation was reduced by 45-65% and soil temperatures were reduced by 5-12 C° under both tree species. Except for early in the growing season, soil-moisture values were similar under tree canopies and in open grasslands (...)
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