@INBOOK {JUO:1989,
title = {Nutrient effects of modification of shifting cultivation in west Africa},
author = {Juo, A. S. R. and Kang, B. T. },
year = {1989},
type = {Mineral nutrients in tropical forest and savanna ecosystems},
pages = {289--300},
publisher = {Blackwell},
isbn = {0-632-02559-X},
note = {In: Mineral nutrients in tropical forest and savanna ecosystems},
}