Abstract
The optimisation of nitrogen fertilisation for cereals in Mediterranean regions is very difficult, because yields and leaching losses are depending on winter rainfall. In this article five years of nitrogen fertilisation trials are analysed in order to get a model which relates winter rainfall, nitrogen fertilisation and wheat yields. A highly significant model obtained, in which soil type and the cultivar were taken into account. In order to improve nitrogen use efficiency and to avoid unnecessary nitrogen fertilisation, information on the minimum amount of nitrogen at seeding time and for how long the first top dressing can be delayed without yield losses will be necessary.
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Carvalho, M., Basch, G. Optimisation of nitrogen fertilisation. Fertilizer Research 43, 127–130 (1995). https://doi.org/10.1007/BF00747691
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DOI: https://doi.org/10.1007/BF00747691