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dc.contributor.authorNtinyari, Winnie
dc.contributor.authorOnyango, Joseph Gweyi
dc.contributor.authorGiweta, Mekonnen
dc.contributor.authorMutegi, James
dc.contributor.authorMochoge, Benson
dc.contributor.authorNziguheba, Generose
dc.date.accessioned2023-07-20T06:10:10Z
dc.date.available2023-07-20T06:10:10Z
dc.date.issued2022-10-21
dc.identifier.citationNtinyari W, Gweyi-Onyango J, Giweta M, Mutegi J, Mochoge B, Nziguheba G and Masso C (2022) Nitrogen budgets and nitrogen use e ciency as agricultural performance indicators in Lake Victoria basin. Front. Sustain. Food Syst. 6:1023579. doi: 10.3389/fsufs.2022.1023579en_US
dc.identifier.otherdoi: 10.3389/fsufs.2022.1023579
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/26331
dc.descriptionarticleen_US
dc.description.abstractToo little nitrogen (N) is a threat to crop productivity and soil fertility in sub- Saharan Africa (SSA). Nitrogen budgets (NB) and nitrogen use e ciency (NUE) are critical tools for assessing N dynamics in agriculture and have received little or no attention in the region. Data were collected from smallholder farmers clustered into two categories, farmers applying and farmers not applying N fertilizers. NB were calculated using the Coupled Human and Natural Systems (CHANS) model approach for field and farm spatial scales. The results showed spatial variabilities in NB and NUE at the field level (maize and rice) across all the catchments. At the field level, N balances were negative for the two crops in all the catchments. Similarly, at the farm gate, a deficit of −78.37 kg N ha−1 was observed, an indicator of soil Nmining. NUE values at the field scale varied across the catchments for both crops, with values for maize grown without N ranging from25.76 to 140.18%. Even with the application ofmineral N at higher levels in rice fields compared to maize fields, NUE values ranged between 81.92 and 224.6%. Our study revealed that the Lake Victoria region su􀀀ers from ine cientNcycling due to depleted soilNpools and lowsynchrony betweenN input and N removal. Therefore, a challenge lies in exploiting more sustainable N sources for farmers in the region for sustainable farming systems. The NB and NUE provide critical information to agriculture stakeholders to develop environmental, agronomic, and economically viable Nmanagement solutions.en_US
dc.description.sponsorshipInternational Institute of Tropical Agriculture (IITA)en_US
dc.language.isoenen_US
dc.publisheriop publisheren_US
dc.subjectcropping systemen_US
dc.subjectmineral fertilizeren_US
dc.subjectN lossesen_US
dc.subjectN managementen_US
dc.subjectsoil depletionen_US
dc.titleNitrogen Budgets and Nitrogen Use Efficiency as Agricultural Performance Indicators in Lake Victoria Basinen_US
dc.typeArticleen_US


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