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 2

Quantity of biomass (t ha⁻¹) dry matter and nutrients contents (% and kg ha⁻¹) applied in each plot in the 2002 cropping seasons, four village sites (Miniffi, Gomè, Gbanlin, and Akpéro), Benin.

Site/treatment	DM	N	P	K	N	P	K
	t ha^−1	%	%	%	kg ha^−1	kg ha^−1	kg ha^−1
Akpéro
T0	4.1	1.7	0.2	0.5	68.4	7.8	21.2
TM	3.5	1.3	0.1	0.5	45.3	5.2	17.4
TMA	9.6	1.3	0.1	0.5	125.9	14.1	47.6
TMM	10.2	1.7	0.2	0.5	177.8	20.2	53.9
Gbanlin
T0	4.0	1.0	0.2	0.5	42.2	6.0	20.7
TM	3.5	2.3	0.2	0.6	78.5	8.1	22.1
TMA	9.1	1.5	0.1	0.6	132.3	9.3	56.6
TMM	9.5	1.9	0.2	0.6	180.4	14.3	61.1
Miniffi
T0	4.3	0.9	0.2	0.6	41.1	6.7	27.6
TM	3.7	1.9	0.1	0.6	70.7	4.8	22.1
TMA	9.3	1.2	0.3	0.6	114.8	26.1	59.7
TMM	9.9	2.4	0.1	0.6	239.6	14.9	63.2
Gomè
T0	4.0	0.9	0.1	0.5	36.4	5.0	19.6
TM	3.5	2.5	0.1	0.6	86.9	2.6	22.2
TMA	9.0	1.2	0.1	0.4	104.9	5.4	34.2
TMM	9.8	1.6	0.1	0.6	160.1	6.7	60.1