Some general charscteristics of farming in a tropical environment; Shifting cultivation systems; Fallow systems; Ley systems; Systems with permanent upland cultivation; Systems with arable irrigation farming; Systems with perennial crops; Grazing systems; General tendences in the development of tropical farm systems.

Few Americans identify slavery with the cultivation of rice, yet rice was a major plantation crop during the first three centuries of settlement in the Americas. Rice accompanied African slaves across the Middle Passage throughout the New World to Brazil, the Caribbean, and the southern United States. By the middle of the eighteenth century, rice plantations in South Carolina and the black slaves who worked them had created one of the most profitable economies in the world. Black Rice tells the story of the true provenance of rice in the Americas. It establishes, through agricultural and historical evidence, the vital significance of rice in West African society for a millennium before Europeans arrived and the slave trade began. The standard belief that Europeans introduced rice to West Africa and then brought the knowledge of its cultivation to the Americas is a fundamental fallacy, one which succeeds in effacing the origins of the crop and the role of Africans and African-American slaves in transferring the seed, the cultivation skills, and the cultural practices necessary for establishing it in the New World. In this vivid interpretation of rice and slaves in the Atlantic world, Judith Carney reveals how racism has shaped our historical memory and neglected this critical African contribution to the making of the Americas.

Sometime around 1500 AD, an African farmer planted a maize seed imported from the New World. That act set in motion the remarkable saga of one of the world’s most influential crops—one that would transform the future of Africa and of the Atlantic world. Africa’s experience with maize is distinctive but also instructive from a global perspective: experts predict that by 2020 maize will become the world’s most cultivated crop. James C. McCann moves easily from the village level to the continental scale, from the medieval to the modern, as he explains the science of maize production and explores how the crop has imprinted itself on Africa’s agrarian and urban landscapes. Today, maize accounts for more than half the calories people consume in many African countries. During the twentieth century, a tidal wave of maize engulfed the continent, and supplanted Africa’s own historical grain crops—sorghum, millet, and rice. In the metamorphosis of maize from an exotic visitor into a quintessentially African crop, in its transformation from vegetable to grain, and from curiosity to staple, lies a revealing story of cultural adaptation. As it unfolds, we see how this sixteenth-century stranger has become indispensable to Africa’s fields, storehouses, and diets, and has embedded itself in Africa’s political, economic, and social relations. The recent spread of maize has been alarmingly fast, with implications largely overlooked by the media and policymakers. McCann’s compelling history offers insight into the profound influence of a single crop on African culture, health, technological innovation, and the future of the world’s food supply.

World Bank Environment Paper 5. This paper reviews land management practices and agricultural innovation in this semi-arid region since the 1930s, when it was feared that the region would quickly lose its capacity to support its inhabitants and the

Part of a major report on world hunger instigated by the World Institute for Development Economics Research, this volume deals with possible solutions to the problem of regular outbreaks of famine in various parts of the world.