Effects of Cropping System and Cowpea Variety on Symbiotic Potential and Yields of Cowpea (Vigna unguiculata L. Walp) and Pearl Millet (Pennisetum glaucum L.) in the Sudano-Sahelian Zone of Mali

Table 1

Cowpea nodules number (nodules/plant) and efficiency as affected by cropping system and cowpea variety at flower buds stage at Cinzana Agronomic Research Station, 2007 and 2008.


Treatments	Flower buds stage
Treatments	Nodules number (nodules/plant)	Efficient nodules (%)

Years
Year 1: 2007	41^a	77
Year 2: 2008	30^b	76

Cropping systems
Millet/cowpea intercropping (1 row/1 row)	47^a	78^ab
Millet/cowpea intercropping (2 hills/1 hill)	19^c	69^b
Cowpea sole crop	40^b	81^a

Cowpea varieties
V1: IT89KD-374	36	86^a
V2: CZ1-94-23-1	32	62^b
V3: CZ11-94-5C	37	80^a

Effect	values	values
Year (Y)	<0.01	—
Cropping system (S)	<0.01	0.03
Year × cropping system (Y × S)	0.07	—
Cowpea variety (V)	0.06	<0.01
Year × variety (Y × V)	<0.01	0.30
Cropping system × cowpea variety (S × V)	—	—
Year × cropping system × variety (Y × S × V)	0.13	—
Coefficient of variation (%)	22.78	21.21

Means followed by the same letters in the same column for each parameter are not significantly different (), according to Duncan test.

International Journal of Agronomy

Effects of Cropping System and Cowpea Variety on Symbiotic Potential and Yields of Cowpea (Vigna unguiculata L. Walp) and Pearl Millet (Pennisetum glaucum L.) in the Sudano-Sahelian Zone of Mali

Table 1