Africa indeed has a rich farming heritage which, in past times has been rooted in natural Africa farming techniques. But with the coming of the Green Revolution in the 1960's, and on the promise of vastly increased yields, farmers increasingly shifted to what we now call 'conventional' systems and synthetic inputs. When these yields failed to materialize over a sustained period, many found themselves dependent upon those inputs, and needed to increase their useage in an attempt to stem ever diminishing returns.
Many of the techniques employed in horticulture speak particularly of the interrelationship between plants, as well as the soil and other resources. Many subsistence farmers, both men and women, work smaller plots of land, to which these techniques are ideally suited.
Mono cropping has had a drastic impact upon the diversity of species available in the wild, and also affects pest management. Thirsty cash crops such as maize and sugar cane are often planted in the driest areas, diverting valuable water resources, when dryland crops such as cassava and sweet potato could be considered. But most importantly is that interrelationship between people and plants. Planting one crop can be disastrous for a family who depend on that commodity price to remain high, before they can turn a profit in order to buy food and clothes, or pay school fees.
Promoting diversification not only promotes a more robust environment, it also ensures diversity of diet, improving access to nutritious food, and building immunity against preventable diseases and infections.
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