1. The document outlines planned activities for 2017 for fertilizer recommendation and blending use cases in Nigeria and Tanzania. Trials will include nutrient omission trials, upgraded nutrient omission trials, and validation trials across 300 sites in each country. 2. A table shows the main activities for year 2, including trial establishment, data collection, fertilizer application, harvesting, and soil/leaf sampling conducted January to December 2017. 3. Key challenges from year 1 are identified such as non-application of fertilizer, farmer demands, weather issues, and data collection difficulties. Mitigation strategies are proposed.

1. www.iita.orgA member of CGIAR consortium
Planned activities for 2017
Fertilizer recommendation and
Blending Use Cases
Group 1:
Innocent Okuku, Peter Mlay, Hammed,
Adeyemi Olojede, Stephen Magige, Guillaume Ezui & ????
Annual Review and Planning Meeting
Ibadan, Nigeria, 5-7 December 2016

2. www.iita.orgA member of CGIAR consortium
Use Case Main Activities (YR2)
Trial Country Nr sites Observation
NOT Nigeria 300 (180 SE, 120 SW) 50% Classic (8 plots), 50%
Upgraded (12 plots)
Tanzania 300 (120 LZ, 100 SZ, 80 EZ) 50% Classic (8 plots), 50%
Upgraded (12 plots)
Validation Nigeria 300 (180 SE, 120 SW) 30% on fertilizer response
assessments in fields
established by farmers
Tanzania 300 (120 LZ, 100 SZ, 80 EZ)

3. www.iita.orgA member of CGIAR consortium
Use Case Main Activities (YR2)
Nutrient Omission Trials (Lead: ARI in TZ, NRCRI and FUNAAB in NG)
• Minimum data collection
• Researcher managed on-farm

4. www.iita.orgA member of CGIAR consortium
Use Case Main Activities (YR2)
Upgraded Nutrient Omission Trials (Lead: ARI in TZ, NRCRI and FUNAAB
in NG)
• Data collection as in year 1
• Researcher managed on-farm

5. www.iita.orgA member of CGIAR consortium
Use Case Main Activities (YR2)
“Validation” Trials (Lead: ARI in TZ, NRCRI and FUNAAB in NG)
• Management by farmer with EA support
• Input provided by the project
• Minimum data collection (site description, management
operation records, final yield data)

6. www.iita.orgA member of CGIAR consortium
Use Case Main Activities (YR2)
ID Activities for Nutrient Ommission Trials,
Fertilizer Response Trials and Validation Trials
(including farmers' field fertilizer response
assessment)
Country Jan Feb Mar Apri May June July Aug Sep Oct Nov Dec Leader Partners
1 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
2 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
3 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
4 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
Project sensitization
Site selection
Collecting and sending Soil Samples
Trials establishment
ID Activities for Nutrient Ommission Trials (classic
and upgraded) and Validation Trials (including
farmers' field fertilizer response assessment)
Country Jan Feb Mar Apri May June July Aug Sep Oct Nov Dec Leader Partners

7. www.iita.orgA member of CGIAR consortium
Use Case Main Activities (YR2)
5 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
6 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
7 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
8 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
Weeding
Fertilizer application (P at planting, N and K at
4WAP, 10WAP, 16WAP)
Non destructive data collection -morphological
and disease (4, 10,16, 30, 44WAP)
Sprout count and gap filling (2 WAP)
ID Activities for Nutrient Ommission Trials (classic
and upgraded) and Validation Trials (including
farmers' field fertilizer response assessment)
Country Jan Feb Mar Apri May June July Aug Sep Oct Nov Dec Leader Partners

8. www.iita.orgA member of CGIAR consortium
Use Case Main Activities (YR2)
9 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
10 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
11 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
12 Nigeria NRCRI,
FUNAAB
SG2000,
Notore,
OyNCGA
Tanzania ARI MEDA,
LGA
Final Harvest (44WAP)- For 2016 trials
Intermediate harvest (16 WAP)
Collecting and sending Leaf Samples (16WAP)
Baseline Survey
ID Activities for Nutrient Ommission Trials (classic
and upgraded) and Validation Trials (including
farmers' field fertilizer response assessment)
Country Jan Feb Mar Apri May June July Aug Sep Oct Nov Dec Leader Partners

9. www.iita.orgA member of CGIAR consortium
Use Case Main Activities (YR2)
13 Nigeria
Tanzania
14 Nigeria
Tanzania
15 Nigeria IPNI IITA
Tanzania IPNI IITA
16 Nigeria IPNI IITA
Tanzania IPNI IITA
IPNI
IPNIPredict soil nutrient stocks and potential yield,
and extrapolate across target intervention area
(Geospacial modelling)
Leaf Sample Analysis
Soil Sample Analysis
QUEFTS Modelling to arrive at V1
AfSIS/IITA
ID Activities for Nutrient Ommission Trials (classic
and upgraded) and Validation Trials (including
farmers' field fertilizer response assessment)
Country Jan Feb Mar Apri May June July Aug Sep Oct Nov Dec Leader Partners

10. www.iita.orgA member of CGIAR consortium
Key challenges (YR2)
Potential Challenges How to address them?
1 Non application of fertilizer to experiment by some
EAs
Closer supervision of suggested
2 Most farmers want to be compensated for the
maintenance of the field
More detailed communication during the sensitization
3 Complain by farmer about small plot size More detailed communication during the sensitization
4 Cattle damage Involve local leaders during sensitization
5 Farmers demand for more input than required for the
trial (cuttings, fertilizer)
Make some additional provision for the farmers
6 Delay and erratic rainfall
7 Planting material insufficiency Sourcing early plantingmaterial
8 Transportation problem Proper budgeting
9 Financing inconsistent with the level of activities Fund allocation should be commensorate with the level of
activities
10 Inability and non-commitment of some extension
agent to collect data
Proper selection of EAs by development partners
11 Pest and disease outbreak Seek appropriate control measures
12 Non-destructive plant monitoring quite challenging
when the cassava plants growth very tall plants
Seek practical solutions (ladder?)

11. www.iita.orgA member of CGIAR consortium