Law of segregation
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PARADIGM SHIFTS IN AGRICULTURAL DEVELOPMENT
PARADIGM SHIFTS IN AGRICULTURAL DEVELOPMENT TRADITIONAL FARMING SYSTEMS Farmers in large parts of the tropics have no tradition of aiming at maximum production per hectare and their main concern was to reduce the risk of crop failure. The principal reason is that there were no convenient markets for food surpluses. The traditional farming systems were integrated, based on self-sufficiency and hence on internal supplies and services between different farm components: mixed cropping with a legume supplying nitrogen to a cereal, field crops supplying fodder for livestock in exchange for manure, etc. However, in the last century these systems proved to be not sufficiently productive to feed the rapidly growing population. These traditional systems were not touched by agricultural science, which was the driving force for ever-increasing yield levels in the temperate zones of the world. Agronomists neglected the traditional mixed farming systems for two reasons: (1) the prevailing notion...
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