PT - JOURNAL ARTICLE AU - Rattan Lal TI - Low-resource agriculture alternatives in sub-Saharan Africa DP - 1990 Jul 01 TA - Journal of Soil and Water Conservation PG - 437--445 VI - 45 IP - 4 4099 - http://www.jswconline.org/content/45/4/437.short 4100 - http://www.jswconline.org/content/45/4/437.full