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methods. The introduction of such practices into undeveloped countries. and the breeding of new crops which are better adapted to their soil and climatic conditions, would be much too slow to provide the huge amount of additional food needed.
The authors say that new and unique developments in research, fertilizers, or irrigation are not likely to have an important beneficial effect on the situation. Also, most of the best agricultural land is already in use. To bring unused land into production would be quite expensive, and low, unprofitable yields would be secured.
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