The System of Rice Intensification (SRI) is an agro-ecological methodology that enables farmers to potentially triple rice yields by shifting management practices rather than relying on external inputs. Developed in Madagascar and refined across Asia, this approach uses younger seedlings, wider spacing, and intermittent irrigation to maximize plant productivity.
What Is SRI?
SRI represents a paradigm shift in crop management that focuses on plant health, soil aeration, and water efficiency. By using less seed and avoiding chemical dependencies, it creates a sustainable path for smallholder farmers, such as those we support through the COJAZ cooperative in Zambezia.
| Practice | Traditional Rice | SRI Rice |
|---|---|---|
| Seedlings age | 30-45 days | 8-12 days |
| Seedlings per hill | 3-5 | 1 (single) |
| Spacing | Random, close | 25x25cm grid |
| Water | Flooded (continuous) | Moist (intermittent) |
| Weeding | Manual/hand | Mechanical weeder (aerates soil) |
| Fertilizer | Chemical | Organic (compost/manure) |
| Yield | 1.5 tons/ha | 4-8 tons/ha |
SRI Results in Asia
Evidence from across Asia demonstrates the transformative power of this method when applied consistently.
| Country | Traditional Yield | SRI Yield | Increase |
|---|---|---|---|
| India | 2.0 tons/ha | 6.5 tons/ha | 225% |
| Cambodia | 1.5 tons/ha | 4.2 tons/ha | 180% |
| Vietnam | 3.5 tons/ha | 7.8 tons/ha | 123% |
| Indonesia | 3.0 tons/ha | 7.2 tons/ha | 140% |
| Mozambique (potential) | 1.5 tons/ha | 5-8 tons/ha | 233-433% |
The Nature of the Harvest
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SRI Applied to Mozambique (Zambézia Province)
For a smallholder farmer in Zambezia, applying these methods at the start of the season means planting fewer seeds and managing water more effectively. This results in healthier root systems and a more resilient crop that can better withstand local environmental conditions.
| Metric | Traditional | SRI | Difference |
|---|---|---|---|
| Seed needed | 50 kg/ha | 5 kg/ha | -90% seed |
| Water needed | Flooded | 40% less | -40% water |
| Yield | 1.5 tons/ha | 6 tons/ha | +300% |
| Profit | $400/ha | $2,300/ha | +$1,900/ha |
Zambézia has 8M hectares of arable land with 1,800mm rainfall. If just 100,000 hectares used SRI, it could produce 600,000 tons of rice worth $240 million. Learn more about how we support farmers in Mozambique and explore our blog.
Frequently asked questions
Why are seedlings planted at a wider spacing in SRI? Wide spacing allows individual plants to receive more sunlight and nutrients, which encourages stronger root development and more tillers per plant.
How does intermittent irrigation improve rice growth? It prevents the soil from becoming anaerobic, ensuring that roots receive oxygen throughout the growing season, which is critical for healthy plant development.
Does SRI require expensive equipment? No, SRI is designed to be accessible. While mechanical weeders help with aeration, the core principles rely on planting techniques and organic soil management that require no external industrial inputs.
Maputo Bridge Capital, founded by Anselmo Boaventura in Fort Worth, Texas, connects sponsors with verified smallholder farmers like those in the COJAZ cooperative. You can sponsor a farmer from $25 to provide funds directly to their local seed and fertilizer shop; note that these sponsorships are gifts to support farmers, not investments, and are not tax-deductible.