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By 1970 many countries had developed their own systems of land evaluation.This made exchange of information difficult,and there was a clear need for international discussion to achieve some form of standardization.' Preparatory work undertaken by two committees, one in The Netherlands and one in FAO, led to the production of a background document (FAO, 1972).This document, together with papers describing land classification systems throughout the world (FAO, 1974), was discussed at a meeting of international experts held in Wageningen in October 1972.Agreement was reached on most of the principles of the proposed framework for land evaluation, and a summary of the discussions and recommendations of the meeting was published (Brinkman and Smyth, 1973).The next stage was the writing of the first draft of a Framework (FAO, 1973).This was widely circulated with a request for comments.In the light of these comments a smaller meeting was held in Rome in January 1975, in which gaps in the draft Framework were identified and suggestions made for improvement.The discussions and recommendations of this second meeting (FA0,1975) form the basis from which the present document has been prepared.A large number of experts in land evaluation, both within FAO and from many different countries, have contributed to or commented upon the present text.