| dc.contributor.author | Okogun, J. |
| dc.contributor.author | Sanginga, Nteranya |
| dc.contributor.author | Abaidoo, R.C. |
| dc.contributor.author | Dashiell, Kenton E. |
| dc.contributor.author | Diels, J. |
| dc.date.accessioned | 2019-12-04T11:18:42Z |
| dc.date.available | 2019-12-04T11:18:42Z |
| dc.date.issued | 2005 |
| dc.identifier.citation | Okogun, J., Sanginga, N., Abaidoo, R., Dashiell, K. & Diels, J. (2005). On-farm evaluation of biological nitrogen fixation potential and grain yield of Lablab and two soybean varieties in the northern Guinea savanna of Nigeria. Nutrient Cycling in Agroecosystems, 73(2-3), 267-275. |
| dc.identifier.issn | 1385-1314 |
| dc.identifier.uri | https://hdl.handle.net/20.500.12478/3291 |
| dc.description.abstract | Several legumes with high biological nitrogen fixation (BNF) potentials have been studied in on-station trials. The processes involved in BNF and the benefits of these species to crop production need to be evaluated using farmers' management practices in farmers' fields. An on-farm trial with 20 farmers was conducted in the northern Guinea savanna (NGS) of Nigeria. The aims were to evaluate the BNF potentials of an improved soybean variety (TGx 1448-2E) and a local variety (Samsoy-2) when inoculated with Bradyrhizobium strains, and of Lablab in farmer-managed and researcher-managed soybean-maize and Lablab-maize crop rotation systems. The level of soil P was generally low with more than 50% of the fields having less than the critical P level. The plant available P content was statistically significantly (P = 0.05) correlated with P in grain (r = 0.60), P in the shoot (r = 0.68), grain yield (r = 0.40) and nodule weight (r = 0.35). Variations in plant parameters (nodulation, shoot dry matter, percentage nitrogen derived from the air [%Ndfa], grain yield, and nutrient uptake) among and within farmers’ fields were attributed to differences in soil fertility and crop management. About 60% of the fields were moderately fertile, sufficient to support legume establishment, while about 30% of the farmers' fields had a low fertility level. For farmers in the study area to benefit from the BNF potentials of the legumes, an external P fertilizer input was necessary as well as suitable crop management practices because all parameters measured in the researcher-managed plots were higher than in the farmer-managed plots. |
| dc.language.iso | en |
| dc.subject | Biological Nitrogen Fixation |
| dc.subject | Yield |
| dc.subject | Northern Guinea Savanna |
| dc.subject | Soybeans |
| dc.title | Onfarm evaluation of biological nitrogen fixation potential and grain yield of Lablab and two soybean varieties in the northern Guinea savanna of Nigeria |
| dc.type | Journal Article |
| dc.description.version | Peer Review |
| cg.contributor.affiliation | International Institute of Tropical Agriculture |
| cg.contributor.affiliation | International Center for Tropical Agriculture |
| cg.contributor.affiliation | Oklahoma State University |
| cg.coverage.region | Africa |
| cg.coverage.region | West Africa |
| cg.coverage.country | Nigeria |
| cg.isijournal | ISI Journal |
| cg.authorship.types | CGIAR and advanced research institute |
| cg.iitasubject | Soybean |
| cg.iitasubject | Nutrition |
| cg.iitasubject | Grain Legumes |
| cg.accessibilitystatus | Limited Access |
| local.dspaceid | 94965 |
| cg.identifier.doi | http://dx.doi.org/10.1007/s10705-005-3821-7 |
