Validation exercise with cassava, plot by plot comparison, of 2 fertilizer rates

The objective of the EiA SAA Nigeria Use Case is to combine 3 fertilizer recommendation tools (AKILIMO for cassava, Nutrient Expert (NE) for maize and Rice Advice for rice) in one interface. Following the request of the “demand partner” Sasakwa Africa Association (SAA), Nigeria, the decision support tools (DSTs) for fertilizer will be combined with advice on the planting or sowing windows. For cassava, this is already available as a module in AKILIMO, for maize and rice, this is under development. Modified versions of the Rice Advice tool, Rice Advice Lite (RAL) and AKILIMO, were/are tested in 2021 and 2022 (for AKILIMO, only the growing season 2021/2022).

The data were collected in the frame of the EiA Sasakawa Nigeria Use Case in the context of a “validation exercise”, a side by side comparison to test the performance of 2 alternative agronomic treatments under farming conditions, implemented on farm with minimal supervision from research. In this case, 2 different fertilizer application rates to cassava were tested. Yield was obtained from the whole plots of 96 m2. However, plot sizes were measured to confirm the plot area by extension agents at harvest and the measured plot size was used for yield calculation as tonne per hectare. Measured plot sizes may deviate from the 96 m2 and may not respect the theoretical plot boundaries at 50% inter and intra row distances. Planting of the validation exercise started in July in 2021 and harvest ended in August 2022. Target states were Benue and Kogi states of Nigeria.


Data and Resources

Additional Info

Field Value
Creator Kreye, Christine
Creator Affiliation International Institute of Tropical Agriculture (IITA)
Creator ID Type ORCID
Creator ID 0000-0001-6090-2856
Subject Vocab (AGROVOC/GACS/CAB) Cassava,Fertilizer,Nitrogen,Yield,Phosphorus,Potassium,Urea,Varieties,Roots,Weight,Nigeria
Subject(s) Cassava fresh root weight
Publisher International Institute of Tropical Agriculture (IITA)
Contributor Person Alpha Kamara, Tijjani Kamaludeen, Bello Muhammad Shehu, Helen Peter, Ali Ibrahim, Kazuki Saito
Contributor Role Hosting Institution
Contributor Project Lead Organisation Center AfricaRice
Contributor Project Lead Center International Institute of Tropical Agriculture (IITA)
Contributor CRP Non-CRP
Contributor Partner AfricaRice, Centre for Dryland Agriculture/Bayero University Kano, Sasakawa Africa Association
Contributor Donor CGIAR
Contributor Project EIA SAA Nigeria Use Case
Project ID AG-004762
Contributor Affiliation International Institute of Tropical Agriculture (IITA)
Open-Access status Open Access
Production Date 2022-11-09
Embargo End Date 2023-12-21
Content Type Dataset
File Format csv
Identifier Type DOI
Identifier Citation
Source EIA SAA Nigeria Use Case
Language English
Relation Not applicable
Agroecological Zone Subhumid warm tropics
Coverage Region Western Africa
Coverage country Nigeria
Coverage Admin Unit Not applicable
Coverage Y (Latitude) 7.60007, 7.48472
Coverage X (Longitude) 8.93435, 7.60007
Coverage Start Date
Coverage End Date
Contact Kreye, Christine; Agronomist and West Africa Coordinator; International Institute of Tropical Agriculture (IITA)
Contact Email
Restriction CC-BY 4.0
Email Permission None
Rights CC-BY 4.0