Abstract
The Danish model DAISY was used to simulate water and nitrogen dynamics and biomass production in a sandy and in a loamy soil located in Southern and Eastern Lower Saxony, Germany. The soil part of the model has a one-dimensional vertical structure. The soil profile is divided into layers on the basis of physical and chemical soil characteristics. The simulated results were compared to experimental data including water content, water tension, mineral nitrogen content, and temperature in the soil, crop canopy development, crop biomass production, and nitrogen accumulation in the aboveground part of the crop in winter wheat and sugar beet. The ability of the model to simulate the main elements in the behavior of the agro-ecosystem was demonstrated.
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