Managing soil fertility - Diagnostic:Prioritizing research efforts to increase cassava on-farm income generation: the case of cassava-based farmers in peri-urban southern Cameroon.
Upcoming SlideShare
Loading in...5
×
 

Managing soil fertility - Diagnostic:Prioritizing research efforts to increase cassava on-farm income generation: the case of cassava-based farmers in peri-urban southern Cameroon.

on

  • 981 views

Innovative Cropping Systems: cassava intercropping. Intensification of traditional systems:cassava responsiveness to soil fertility regimes in Mid-altitude zones. The influence of tuber storage on ...

Innovative Cropping Systems: cassava intercropping. Intensification of traditional systems:cassava responsiveness to soil fertility regimes in Mid-altitude zones. The influence of tuber storage on food quality characteristics of at least 10 genotypes of D. alata evaluated. Managing other abiotic process: Characterization of the photosynthetic pathway of some tropical food yams.

Statistics

Views

Total Views
981
Views on SlideShare
981
Embed Views
0

Actions

Likes
0
Downloads
7
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

CC Attribution-NonCommercial LicenseCC Attribution-NonCommercial License

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Managing soil fertility - Diagnostic:Prioritizing research efforts to increase cassava on-farm income generation: the case of cassava-based farmers in peri-urban southern Cameroon. Managing soil fertility - Diagnostic:Prioritizing research efforts to increase cassava on-farm income generation: the case of cassava-based farmers in peri-urban southern Cameroon. Presentation Transcript

  • Duindam and Hauser
    • Cassava
    • Cameroon
    • A1 Diagnostic
    • A2 Cover cropping
    • Data from farmer interviews and group discussions in three villages in peri-urban Yaoundé indicate that technologies for sustainable intensification of cassava production should target both, pre- and post harvest activities. They should focus on reduced labour requirements and pest and disease management. The technology proposed therefore re-emphasizes on returns to labour as a parameter of success and includes the involvement of farmers in technology testing. A commercial cassava field with a rotational pueraria fallow system is discussed as a basic design. To ensure appropriateness and subsequently a higher adoption potential and hence, higher impact, the system has build-in flexibility for further on-farm adaptations
    Managing soil fertility – Diagnostic: Prioritizing research efforts to increase cassava on-farm income generation: the case of cassava-based farmers in peri-urban southern Cameroon (J. Duindam, S. Hauser)
  • Mahungu
    • Cassava
    • Malawi
    • A1 : Intercropping
    • A2 : Fertilizers
    • A3 : Drought resistance
  • Managing soil fertility – Innovative Cropping Systems: cassava intercropping (Dr. Mahungu)
    • Objective: In order to improve efficiency per unit area, an intercropping trial was initiated to assess cassava productivity when associated to maize and pigeon pea ( Cajanus cajan ), a common practice among farmers of Malawi
    • First results:
      • yield of cassava and maize varied with cassava type
      • Yield of Cajanus cajan remained unaffected by intercropping
      • Some cassava variety showed good yielding ability at both sole and intercropping
    • Four varieties evaluated for their response to time of fertilizers applications (4 to 8 WAP
    • Results: no clear trend!
    Managing soil fertility – Intensification of traditional systems: cassava responsiveness to soil fertility regimes in Mid-altitude zones (Dr. Mahungu)
  • Maziya-Dixon
    • Yam
    • Nigeria
    • influence of tuber storage on food quality characteristics of at least 10 genotypes of D. alata evaluated
  • The influence of tuber storage on food quality characteristics of at least 10 genotypes of D. alata evaluated (B. Maziya-Dixon)
    • Moisture content decreased (71.76% to 68.06%) with expected increase in dry matter content (29.18 to 31.90%) from harvest to the fifth month of storage
    • Sprouting and rotting of tubers were increased drastically after fourth month of storage
    • Changes in starch content did not follow any specific trend during the first three months of storage; however, there was a general decrease from the third month of storage to the last month (72.1 to 66.52%).
    • Sugar content was relatively high from the first month of storage to the third month which cannot be explained, however, it increased from 4.67% to 6.83% at the end of the fifth month.
    • Protein content did not follow any particular trend (slight decrease at the fifth month)
    • Ash content likewise did not follow any particular trend.
    • The amylose contents showed no specific trend during storage though it generally decreased slightly from the first month to the end of storage (25.26-24.15%).
    • Swelling power increased steadily (6.01 to 9.03%) with the length of storage period.
    • There was no specific trend for water binding capacity and solubility .
    • Generally pasting properties increased steadily from the 3rd month of storage
    • Pasting temperature however, decreased from 86.50 to 83.81 oC. This implies that stored tubers may need relatively less energy and time to cook compared to freshly harvested tubers.
    • Peak viscosity and final viscosity increased from the first month to the fifth month
    • With the significant decrease in starch content, swelling power and pasting viscosities were expected to decrease with storage period; however, the reverse was observed. This could be attributed to increased dry matter content. The increase in pasting viscosities may be the reason why traditionally D. alata is stored for some time before being used for products that require a thick cohesive paste (pounded yam).
  • Cornet
    • Yam
    • Benin (Guadeloupe)
    • A1. Cover cropping of yam based systems with Pueraria phaseoloieds
    • A2. Determining the photosynthetic pathway of major food yams
    • A3. Effect of nitrogen fertilization on pounded yam quality
    • A4. Evaluation of yam improved varieties on tuber quality
  • Managing other abiotic process: Characterization of the photosynthetic pathway of some tropical food yams (Cornet)