Dry Matter Production, Nutrient Cycled and Removed, and Soil Fertility Changes in Yam-Based Cropping Systems with Herbaceous Legumes in the Guinea-Sudan Zone of Benin

Table 7

Dry matter (t ha⁻¹) of yam tubers removed and yam shoots recycled in the 2002-2003 and 2004-2005 cropping seasons in four villages in Benin.

	2002-2003 cropping seasons					2004-2005 cropping seasons
	T0	TM	TMA	TMM	LSD	T0	TM	TMA	TMM	LSD
Yam DM removed (t ha^−1)
DM removed	5.09	3.83	7.20	7.33	0.51	4.34	3.02	8.00	8.02	0.55
Yam shoots DM recycled (t ha^−1)
Yam shoots	1.27	0.96	1.80	1.83	0.13	1.09	0.76	2.00	2.00	0.14

Means with the same letter within row are not significantly different ().
DM: dry matter; LSD: least square difference at 5%.
T0 (control 1): one-year fallow-yam rotation; TM (control 2): maize-yam rotation; TMA: A. histrix/maize intercropping-yam rotation; TMM: M. pruriens/maize intercropping-yam rotation.