Abstract
The potato crop is usually grown on ridges of height 20–25 cm and about 75 cm apart. It is to be expected that not only will vertical movement of water and nutrients occur in the soil but, also, due to the form of the ridge and the spatial variation of root distribution, horizontal movement will occur as well. Therefore, a two-dimensional model for soil water movement was constructed which could be used to simulate water transport within a ridge for a crop with a non-regular distribution of roots. The model was extended with modules describing nutrient transport, water and nutrient uptake. Data taken from literature were used to demonstrate the possibilities of this model. For identical environmental conditions and nitrogen supply it was shown that in a sandy clay loam nitrogen uptake was larger than in a loamy sand. This could be explained by considering the differences in the hydraulic properties of the two soils, the sandy clay loam having a higher water content at the same pressure head.
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De Willigen, P., Heinen, M., Van Den Broek, B.J. (1995). Modelling water and nitrogen uptake of a potato crop growing on a ridge. In: Haverkort, A.J., MacKerron, D.K.L. (eds) Potato Ecology And modelling of crops under conditions limiting growth. Current Issues in Production Ecology, vol 3. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0051-9_5
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DOI: https://doi.org/10.1007/978-94-011-0051-9_5
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