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Transforming Key African Farming Systems through
Sustainable Intensification
Jerry Glover Bureau for Food Security USAID jglover@usaid.gov
Can Sustainable
Agricultural
Intensification
Feed the World?
USDA Ag Outlook
Forum
23 February 2012
Over 1 billion people classified as
‘urgently hungry.’
Food and Agriculture Organization (2010)
Too little:
“…largest threat to biodiversity and
ecosystem function of any single
human activity.”
Millennium Ecosystem Assessment (2005)
Too much:
Green Revolution =
Improved seeds + inputs + water
Most successful with good
soils, abundant water
Failed to address some social
and environmental issues
Africa:
•>80% soils with
serious limitations
•95% rainfed
•High variability
•Low input
investment
Africa RISING www.africa-rising/wikispaces.com
Africa Research In Sustainable Intensification for the Next Generation
Transforming Key African Farming Systems
through Sustainable Intensification
Africa RISING www.africa-rising/wikispaces.com
Africa Research In Sustainable Intensification for the Next Generation
Transforming Key African Farming Systems
through Sustainable Intensification
Africa RISING www.africa-rising/wikispaces.com
Africa Research In Sustainable Intensification for the Next Generation
Research for development of TRANSFORMING
options for small-holder farmers
• Meet multiple needs at multiple scales (includes
social, economic, nutrition, gender, natural resource management issues)
• Go beyond trade-offs
• Adaptable & adoptable
Sudano – Sahelian zone
East and
Southern
Africa Maize
Mixed
Ethiopian
Highlands
KEY FARMING SYSTEMS
in 3 regions
• High poverty
• High population
• Medium – high
agriculture potential
Africa RISING www.africa-rising/wikispaces.com
SUSTAINABLE INTENSIFICATION
• While increasing productivity and/or reducing risk:
• Utilize ecological processes (e.g., biological N fixation, natural
predators)
• Minimize environmental hazards
• Maintain soil & water quality
• Use modern & traditional strategies
• Acknowledge local environmental & cultural conditions
(Pretty et al. 2011)
Africa RISING www.africa-rising/wikispaces.com
Illustrative examples:
• ‘Push-pull’ management of pests and weeds
• Evergreen Agriculture
• Doubled-up maize-legume systems
(Pretty et al. 2011)
Africa RISING www.africa-rising/wikispaces.com
‘Push-pull’ management of stem-borers and
Striga weeds
Desmodium:
• N-fixing perennial
• Intercropped with maize
• “Pushes” Striga and
stemborer moths
• “Pulls” natural enemies
(Khan et al. 2010)
Napier grass:
• Perennial forage crop
• Planted around field
• “Pulls” stemborer females
Benefits
• 3.5X greater maize yields
• Locally available crops
• Reduced external inputs
• Increased livestock
forage production
• Improved soil fertility &
moisture retention
• Adopted on 30,000 farms
(Khan et al. 2010)
‘Push-pull’ management of stem-borers and
Striga weeds
Evergreen
Agriculture
• Intercropping of trees
in annual crop fields
• Low investment costs
• Often use N-fixing trees
• Complementary
growing seasons &
resource use
(Garrity et al. 2010)
Benefits
• 4X greater maize yields
• Better yields in high & low
rainfall years
• Enables farm investment
• Increased fuel & forage
production
• Improved soil fertility &
moisture retention
• Adopted on >5 m ha
(Garrity et al. 2010)
Evergreen
Agriculture
Doubled-up Maize/Legume Systems
Pigeonpea
Soybean
• Yr 1: Intercrop soybean &
shrubby pigeonpea
• Yr 2: Pigeonpea regrows in
planted maize
(Snapp et al. 2010)
Doubled-up Maize/Legume Systems
Benefits
• Same maize yields
with ½ the fertilizer
• 50% greater protein
yield
• Permanent soil cover
• Decreased risk, labor
requirements
• Livestock fodder
production
• >8,000 adopters in
Malawi
Can Sustainable
Agricultural Intensification
Feed the World?
Greatest loss of
biodiversity in human
history, much due to
agriculture
Harvested
nutrients
(1960-2010)
Greatest loss of
biodiversity in human
history, much due to
agriculture
Harvested
nutrients
(1960-2010)
Even greater impacts?
Harvested
nutrients
(1960-2010)
Additional
needs

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Glover transforming key african farming systems through sustainable intensification

  • 1. Transforming Key African Farming Systems through Sustainable Intensification Jerry Glover Bureau for Food Security USAID jglover@usaid.gov Can Sustainable Agricultural Intensification Feed the World? USDA Ag Outlook Forum 23 February 2012
  • 2. Over 1 billion people classified as ‘urgently hungry.’ Food and Agriculture Organization (2010) Too little:
  • 3. “…largest threat to biodiversity and ecosystem function of any single human activity.” Millennium Ecosystem Assessment (2005) Too much:
  • 4. Green Revolution = Improved seeds + inputs + water Most successful with good soils, abundant water Failed to address some social and environmental issues
  • 5. Africa: •>80% soils with serious limitations •95% rainfed •High variability •Low input investment
  • 6. Africa RISING www.africa-rising/wikispaces.com Africa Research In Sustainable Intensification for the Next Generation Transforming Key African Farming Systems through Sustainable Intensification
  • 7. Africa RISING www.africa-rising/wikispaces.com Africa Research In Sustainable Intensification for the Next Generation Transforming Key African Farming Systems through Sustainable Intensification
  • 8. Africa RISING www.africa-rising/wikispaces.com Africa Research In Sustainable Intensification for the Next Generation Research for development of TRANSFORMING options for small-holder farmers • Meet multiple needs at multiple scales (includes social, economic, nutrition, gender, natural resource management issues) • Go beyond trade-offs • Adaptable & adoptable
  • 9. Sudano – Sahelian zone East and Southern Africa Maize Mixed Ethiopian Highlands KEY FARMING SYSTEMS in 3 regions • High poverty • High population • Medium – high agriculture potential Africa RISING www.africa-rising/wikispaces.com
  • 10. SUSTAINABLE INTENSIFICATION • While increasing productivity and/or reducing risk: • Utilize ecological processes (e.g., biological N fixation, natural predators) • Minimize environmental hazards • Maintain soil & water quality • Use modern & traditional strategies • Acknowledge local environmental & cultural conditions (Pretty et al. 2011) Africa RISING www.africa-rising/wikispaces.com
  • 11. Illustrative examples: • ‘Push-pull’ management of pests and weeds • Evergreen Agriculture • Doubled-up maize-legume systems (Pretty et al. 2011) Africa RISING www.africa-rising/wikispaces.com
  • 12. ‘Push-pull’ management of stem-borers and Striga weeds Desmodium: • N-fixing perennial • Intercropped with maize • “Pushes” Striga and stemborer moths • “Pulls” natural enemies (Khan et al. 2010) Napier grass: • Perennial forage crop • Planted around field • “Pulls” stemborer females
  • 13. Benefits • 3.5X greater maize yields • Locally available crops • Reduced external inputs • Increased livestock forage production • Improved soil fertility & moisture retention • Adopted on 30,000 farms (Khan et al. 2010) ‘Push-pull’ management of stem-borers and Striga weeds
  • 14. Evergreen Agriculture • Intercropping of trees in annual crop fields • Low investment costs • Often use N-fixing trees • Complementary growing seasons & resource use (Garrity et al. 2010)
  • 15. Benefits • 4X greater maize yields • Better yields in high & low rainfall years • Enables farm investment • Increased fuel & forage production • Improved soil fertility & moisture retention • Adopted on >5 m ha (Garrity et al. 2010) Evergreen Agriculture
  • 16. Doubled-up Maize/Legume Systems Pigeonpea Soybean • Yr 1: Intercrop soybean & shrubby pigeonpea • Yr 2: Pigeonpea regrows in planted maize (Snapp et al. 2010)
  • 17. Doubled-up Maize/Legume Systems Benefits • Same maize yields with ½ the fertilizer • 50% greater protein yield • Permanent soil cover • Decreased risk, labor requirements • Livestock fodder production • >8,000 adopters in Malawi
  • 19.
  • 20.
  • 21. Greatest loss of biodiversity in human history, much due to agriculture Harvested nutrients (1960-2010)
  • 22. Greatest loss of biodiversity in human history, much due to agriculture Harvested nutrients (1960-2010) Even greater impacts? Harvested nutrients (1960-2010) Additional needs