A recent study by the International Food Policy Research Institute
estimates that rainfed maize yields in countries in northern Central America
are at the highest risk of crop loss as a result of climate change in the
Maize crops occupy more than 36% of total cultivated land in
Central America and almost 19% in the Andean countries. IFPRI’s study examined
potential impacts of climate change through the year 2050. According to the
results, Costa Rica is expected to suffer the hardest blow to maize yields, at
an almost 17% loss, with Honduras following behind at around 12%.
Steep population growth and changing dietary preferences will quadruple maize demand in sub-Saharan Africa. Can production keep up? At what cost to climate change?
Using data from Burkina Faso, Ghana, Mali and Nigeria in West Africa and from Ethiopia, Kenya, Tanzania, Uganda and Zambia in East Africa, our research shows that average production of 1.7 t/ha of maize in 2010 must increase to 6.8 t/ha to meet estimated demand in 2050.
To achieve this, per-hectare maize output must grow by about 3.5% per year, a rate never witnessed at national or supra-national scales anywhere in the world in rainfed agriculture.
Corresponding nutrient inputs must grow by over 7% annually to prevent further soil depletion and degradation.
Are such yield increases possible?
Our answer is a resounding yes. Using the Global Yield Gap Atlas, we calculated an average rainfed yield ceiling of 9.2 t/ha for maize across the nine countries, with area-weighted country averages ranging from 6 t/ha in Tanzania to over 12 t/ha in Ethiopia.
New partnership will help farmers in Malawi, Rwanda and Tanzania have better access to seeds that help maize crops better withstand growing challenges of drought, pests, diseases, and climate change.
NEW YORK and TEXCOCO, Mexico — Working together to improve access to and availability of climate-resilient maize varieties in eastern Africa, the Clinton Foundation and the International Maize and Wheat Improvement Centre (CIMMYT) are launching a partnership that will not only improve access by smallholder farmers to modern maize varieties but also aim to bolster food security in Malawi, Rwanda and Tanzania. The Clinton Foundation is launching this partnership through the Clinton Development Initiative, which works in the region to improve economic opportunity for farmers through better access to markets, technology, and inputs like seeds and fertilizer.
Felipa Martinez shows off some of her family’s maize from last year’s harvest. Photo: Matthew O’Leary
Felipa Martinez, an indigenous Mexican grandmother, grins as she shows off a bag bulging with maize cobs saved from last harvest season. With her family, she managed to farm enough maize for the year despite the increasing pressure brought by climate change.
Felipa’s grin shows satisfaction. Her main concern is her family, the healthy harvest lets her feed them without worry and sell the little left over to cover utilities.
“When our crops produce a good harvest I am happy because we don’t have to spend our money on food. We can make our own tortillas and tostadas,” she said.
Her family belongs to the Chatino indigenous community and lives in the small town of Santiago Yaitepec in humid southern Oaxaca. They are from one of eleven marginalized indigenous communities throughout the state involved in a participatory breeding project with the International Maize and Wheat Improvement (CIMMYT) to naturally improve the quality and preserve the biodiversity of native maize.
These indigenous farmers are custodians of maize biodiversity, growing seeds passed down over generations. Their maize varieties represent a portion of the diversity of the 59 native Mexican races of maize, or landraces, which first developed from wild grasses at the hands of their ancestors. These different races (or types) of maize diversified through generations of selective breeding, adapting to the environment, climate and cultural needs of the different communities.