Biological Nitrogen Fixation by Local and Improved Genotypes of Cowpea in Burkina Faso (West Africa): Total Nitrogen Accumulated can be used for Quick Estimation

Table 2

Grain, shoot, and total biomass yields of local and improved genotypes and nonfixing cowpea.

Types and names of cowpea genotypes		Shoot, grain and total biomass yields (kg ha^−1)
Cowpea genotypes	Names	Shoot	Grain	Biomass
Local genotypes	Gorom local	433	313	746
	Moussa local	477	419	896
	Boussé local	759	741	1500
Improved genotypes	11K	1690	515	2205
	11P	2080	533	2613
	Bambey -21	800	633	1433
	IAR 7/180-4-5-1	1338	647	1985
	KVX 414-22-72	785	678	1463
	IT 89KD374-57	602	771	1373
	KN 1	952	800	1752
	TVX -3236	1047	901	1948
Non-fixing genotype	IC-1	301	264	566
Standard Error		101	49	146