J Soil Sci 25:165–178Įvans LT (1993) Crop evolution, adaptation and yield. 32, Wageningen, The Netherlandsīurns IG (1974) A model for predicting the redistribution of salt applied to fallow soils after excess rainfall or evaporation. Schweizerbart, Stuttgartīoons-Prins ER, de Koning GHJ, van Diepen CA, Penning de Vries FWT (1993) Crop specific simulation parameters for yield forecasting across the European Community.
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Ital J Agron 6:43–56ĪG Boden (1994) Bodenkundliche Kartieranleitung, 4th edn. J Agric Sci Cambridge 112:287–294īellocci G, Silvestri N, Mazzoncini M, Menini S (2002) Using the CROPSYST model in continous rainfed maize ( Zea mais L,) using alternative management options. Eur J Agron 12:37–54Īustin RB (1989) Genetic variation in photosynthesis. Quart J Roy Meteor Soc 50:121–131Īsseng S, van Keulen H, Stol W (2000) Performance and application of the APSIM NWHEAT model in the Netherlands. Ångström A (1924) Solar and terrestrial radiation. The index of agreement of 0.9 indicates that the annual weather impact on yield fluctuations was correctly reflected.Īddiscott TM, Whitmore AP (1987) Computer simulation of changes in soil mineral nitrogen and crop nitrogen during autumn, winter and spring. Therefore, an adoption of crop parameters for older varieties is necessary. Simulated historical winter wheat and potato yields were distinctly overestimated during the initial 50 years. Soil organic carbon, derived from simulated nitrogen pools, showed acceptable results for the unfertilized plot, but a distinct underestimation on plots with farmyard manure application. The long term model performance was investigated using data from 1903 to 2002 of four differently managed plots in Bad Lauchstädt.
![soil mineral nitrogen apsim soil mineral nitrogen apsim](https://image1.slideserve.com/1858809/slide7-l.jpg)
Equilibration of the pools, using data from a neighbouring long term experiment, improved soil mineral nitrogen simulation to an IA of 0.72 for the cropped and 0.91 for the fallow plot. Soil mineral nitrogen was significantly overestimated on the cropped plot (IA = 0.45) as well as on the black fallow plot (IA = 0.65) using the default initialization of the decomposable nitrogen pools from the organic matter content. For the loess site in Bad Lauchstädt model results for above-ground biomass, storage organ and N-uptake agreed well with observations over a 4-year rotation with IA values of 0.93, 0.94 and 0.71, respectively. Crop growth and N-uptake was simulated well with IA values >0.89 and >0.75, respectively. The model was able to simulate soil water and nitrogen contents on the sandy plots of Müncheberg with an index of agreement (IA) >0.8 and >0.69. Model runs with HERMES were performed over entire crop rotation cycles for two experimental sites on loamy and sandy soils in Germany with differently managed plots.