the green revolution forty years later: lessons learned ...€¦ · the green revolution forty...
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The Green Revolution Forty Years Later: Lessons Learned and
Unfinished Business
Prabhu Pingali
Deputy Director Agricultural Development Bill & Melinda Gates Foundation
Views expressed in this presentation are personal.
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Green Revolution Impacts on Crop Improvement
Production • Cereal output in
developing countries has grown 2.8 percent annually for three decades
Productivity • Yields, not area, were
responsible for growth • TFP grew along with
yields
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Long run commodity price decline has had a positive impact on food security and poverty
reduction Real prices for commodity group
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Without the Green Revolution
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Food production would have been 20% lower in the year 2000;
Food imports to developing countries would be almost 30% higher;
Calorie consumption per capita would be 13-14% lower;
Child malnutrition would be up by 6-8%.
Evenson & Rosegrant (2003)
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India: Green Revolution & Rural Poverty
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20%
60%
40%
GREEN REVOLUTION
PERIOD
1965
1985
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Small holder productivity growth triggered overall rural growth and rural
transformation
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The Green Revolution was Public Sector Driven
International & national public sector played a crucial role in making it happen
Global Green Revolution networks enabled technology access by developing countries and yielded substantial benefits
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Evidence on Factors Contributing to Productivity Growth
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Factors affecting
agricultural growth
Components Taiwan
(1950-1960) China
(1978-1990) Indonesia
(1976-1993) South Korea (1970-1979)
India (1982-1994)
Vietnam (1990-1999)
Policies /institutions
Macro/sectoral/ legal/political reforms 30% 30% 32% 30% 15% 25%
Infrastructure
Rural Roads 15% 15% 10% 10% 30% 20%
Irrigation 10% 10% 8% 8% 7% 5%
Electricity, health/ education, telecomm 15% 20% 30% 15% 11% 25%
Inputs Delivery
Fertilizer, pesticide, seed, machinery, etc 10% 2% 7% 20% 6% 2%
Ag. credit/insurance (subsidies for start-up or lending) 5% 8% 3% 5% 2% 8%
Research/ extension
Ag. Research/Natural resources mgmt (NRM) 10% 10% 10% 2% 20% 10%
Ag. Extension/NRM 5% 5% -- 10% 9% 5%
All factors Total 100% 100% 100% 100% 100% 100%
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Where did the Green Revolution Work?
Where demand for intensification was high – high population densities and good market infrastructure
On favorable production environments that were amenable to further intensification
For the primary food grains – rice, wheat, maize
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And where it did not work?
Low demand conditions
Marginal production environments
“Orphan” staple food crops, especially those with little research backlog ( eg. cassava)
Sub-Saharan Africa – largely bypassed by the Green Revolution
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A Mixed Record on Equity Impacts
Farm size effects
Labor market impacts
Gender differences in sharing benefits
Favorable vs. unfavorable environments
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Limits to Green Revolution Lead Growth
Technology was important but only with enabling policies, institutions, & infrastructure investments
The Green Revolution strategy worked for a few crops & very discrete production environments
Poverty & food insecurity persisted despite the GR success
Unintended consequences undermined the gains that were made
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Increased use of fertilizers, pesticides, and water
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Effects on Water and Soils
Agriculture is the most consumptive human use of fresh water. This affects both the quantity and quality of water resources.
Direct and indirect negative effects have been well documented, these include: • Declining water tables • Drainage of wetlands; • Nutrient loading of surface water
and groundwater; • Salinization and waterlogging of
soils; • Agrochemical contamination; • Siltation of rivers
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Crop and Resource Management Technologies: Can we achieve scale?
Few examples of wide spread, cross country use of non-breeding technologies
Technologies for sustainable use of inputs (eg., water use efficiency) have had limited success
Knowledge-intensive practices (such as IPM) have not scaled up well
We need a new paradigm for addressing sustainable crop & resource management
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Challenges for Asia
Sustaining staple crop productivity gains while diversifying into high value agriculture
Maintaining competitiveness of cereal crops in an era of globalization
Dealing with the re-organization of production systems—towards scale economies
Addressing inter-regional disparities in productivity & income growth
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Challenges for Africa
Low and inelastic demand conditions
Heterogeneous farming systems and staple crops
Low levels of agricultural R&D
Under investment in enabling environment
Poor incentives for enhancing productivity
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Over-riding Considerations
The stickiness of Green Revolution era policies, especially input subsidies
The shifting locus of agricultural R&D from the public to the private sector
Climate change threats to overall productivity growth & to increased incidence of extreme events
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The challenge for future Green Revolutions:
Reaching beyond the low hanging fruit
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