@INBOOK {SINGH:1999b,
title = {Farmer participatory evaluation of improved strip intercropping systems in northern Nigeria},
author = {Singh, B. and Tarawali, S. and Gupta, S. and Tabo, R. and Nokoe, S. and Odion, C. },
year = {1999},
type = {Agronomy Abstracts},
number = {37},
}