Abstract
The biological and meteorological data were collected at Jokioinen in 1982—87. Potential and actual (water limited) production of dry matter were simulated using a Danish WATCROS model for spring barley, spring turnip rape and timothy grass. The most important data of the biological programme comprised weekly measurements of the crop surface (GAI), dry matter yield, root growth, soil water content and yield analyses of the harvest. All these measurements were performed for both irrigated and non-irrigated plots. The needed meteorological parameters for the daily simulation of the dry matter yield were global radiation, air temperature and precipitation. The simulated dry matter production results with the WATCROS model were generally higher than those measured. In order to obtain a better fit into the Finnish climatic and soil conditions, the Finnish model should take soil water conditions and efficient use of photosynthetically active radiation into consideration.
Highlights
IntroductionThe research programme was planned by a working group of the agricultural meteorology of Section I of the Association of the Agricultural Scientists of Scandinavia
The models are based on experimental results of the weekly dry matter and crop area index (CAI) measurements and daily measurements of the climatological and hydrological factors of the experimental field
Harvest index values of barley and turnip rape were calculated as the dry matter yield of grain at the end harvest per the maximum measured
Summary
The research programme was planned by a working group of the agricultural meteorology of Section I of the Association of the Agricultural Scientists of Scandinavia. It was carried out in Denmark in 1982—85, in Norway in 1982—86 and in Finland in 1982—87. The models are simple enough to be used for routine monitoring of changes during the growing season and of the production of various crops. Another aim of the project was to test the Danish models
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