Since the introduction of maize into Africa several centuries ago, a large part of the continent has become dependent on it as its staple starch. For many countries in Africa, 'food security' is now often mainly defined by the availability and affordability of maize. This soil nutrient-hungry cereal is however proving to be increasingly difficult for many African countries to grow. Yields are stagnating or dropping as the fertility of tired soils declines.
A relatively minor proportion of African farmers, most of whom farm on a subsistence level, can afford fertilizer. Many countries have inputs subsidies programmes but their reach and effectiveness varies widely.The long-term sustainability of these expensive, often highly politicized and donor-funded schemes is questionable. Sustainable farming methods of boosting soil fertility and crop yields are often not easy for small scale farmers to practice for field crops like maize for one reason or another. Then there is the new factor of climate unpredictably that can throw off a rain-dependent country's best farming preparations.
In the face of these and many other pressures on the successful cultivation of maize, the annual needs of this crop are increasing along with their booming populations. This necessarily means expensive partial importation of maize, and often dependence on relief efforts by international agencies and foreign donor governments. Consequently, many countries are chronically on the brink of maize famine.
Because of how critical to food security maize has become in Africa, it has also become a very 'political' crop. A government's fortunes can quickly rise or fall on the basis of its perceived success or failure at 'feeding the nation' with maize, whether through increased production or when necessary, through import. Africa's governments are thus in perpetual efforts to boost domestic maize production.
Apart from the increasing agronomic and climatic challenges of growing maize, there are many others which have made long-term maize self-sufficiency a mirage for most African countries. Policies to encourage farmers to boost production may be contradicted by policies to fix the farmer's selling price (sometimes below the cost of production) in a populist attempt to keep the staple 'affordable' to the poor majority. This inevitably results in decreased production the following year. Frequently, drought, and occasionally floods, can destroy a country's carefully prepared farming plans.
Many countries bust their budgets to subsidize the purchase price of maize, but this often has many other unintended negative consequences, and the sheer size of the challenge of long-term subsidies for a major food like this has meant this is not a realistic long-term solution either.
Malawi in recent years has succeeded in turning its maize fortunes around from famine to exportable surplus with a fertilizer and seed subsidy programme which has so far coincided with good rains. As negligible quantities of its maize are grown under irrigation, it remains to be seen what will happen in the event of drought. In the event of drought, inappropriate fertilizer application may even hasten the demise of moisture-stressed maize plants by scorching them. This potential problem is compounded by the fact that farmers have been encouraged to abandon traditional maize varieties that are well-suited to local conditions, including frequent dry spells and soils of marginal natural fertility. The commercial hybrid varieties many have taken up provide their higher yields under specific, idealized conditions of fertilizer application and rainfall availability. When those increasingly unpredictable conditions do not exist, or are 'mistimed,' the result is often massive crop failure and yields even lower than the 'old-fashioned' traditional varieties would provide in similar stress conditions.
Zambia also has recently enjoyed maize surpluses, said to be largely due to the efforts of large-scale Zimbabwean farmers who fled the land reform upheaval in their homeland. Zimbabwe has begun to experience a turn-around in its crop production and may in a few years again achieve maize self-sufficiency. Led by its small-scale farmers, the increased production is rain-fed, as in most of Africa, meaning the gains of several years can be stalled or reversed in just one bad drought year. As it is, the expected bumper maize harvest of what had so far been an excellent rain season is threatened by a long in-season dry spell that has brought the maize crop under severe stress.
In response to the agronomic difficulties of growing a crop in conditions that are increasingly unfriendly for it, many coping mechanism are being tried. Those few countries with fairly well-developed research capabilities have on-goingmaize seed-breeding programmes to develop varieties better suited to the increasingly harsh growing conditions.A much-heralded recent addition to these national efforts has been the WEMA (Water Efficient Maize for Africa) maize-breeding programme in several countries, funded by the Bill and Melinda Gates Foundation.
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