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Crop yield is measured through the use of an agrometeorological model known as the crop growth monitoring system (CGMS) which simulates the growth of plants. This system presupposes that agricultural production results from an interaction between meteorological data, growth parameters, soil data and a series of historical statistics, and it uses meteorological data and various environmental factors.

The semi-determinist agrometeorological approach aims to explain the growth of plants by depending on underlying biological processes, such as photosynthesis and respiration. The model uses a module comparing actual and potential transpiration. It describes the life cycle of plants over daily periods, from emergence to flowering and maturity. Variables of plant growth are simulated according to the phenological stage of development of the plant. .

Additional information

Authors: NDACYAYISENGA N, CRI, Lystrup (DK);TERRES J M, JRC Ispra (IT)
Bibliographic Reference: EUR 17728 IT (1998) 35pp., free of charge
Availability: Available from the Public Relations and Publications Unit, JRC Ispra, I-21020 Ispra (IT), Fax: +39-332-785818
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