Abstract
It is evident at field conditions the necessity to develop simple management technology, easy to be dealt by the farmers and growers, and also usefuld for agronomic extension. The index makes possible the monitoration of the farm performance in a large series of periods, and to fallow the performance of similar properties, and also posicionate the farm in large context trough regional index.

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Copyright (c) 1990 Oswaldo Calzavara
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