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Alley cropping of maize with calliandra and leucaena in the subhumid highlands of Kenya Part 1. Soil-fertility changes and maize yield
(Kluwer Academic Publishers, 1999-06)
Although N-rich leaf biomass of multipurpose trees is known to be a good source of
N to crops, integrating such trees into crop production systems is a major challenge in the development of viable agroforestry systems. ...