Abstract
The N balance allows the calculation of the fertilizer requirement which depends on the amount of N absorbed by the crop, the amount of inorganic N in the soil or produced by mineralization and N losses of the system, which are quantified by the Recovery Efficiency. A fertilization plan should take into account the variability of environmental factors, especially rain, to distribute the N with flexibility to match the specific conditions of each year. Doing so we will avoid yield reductions due to N deficiency and the negative environmental impacts by excess application. Fertilization of trees should be based on the nutrient balance (mature trees) or the growth rate expected from actual transpiration.
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Bibliography
Brady, N. C., & Weil, R. R. (2008). The nature and properties of soils (4th ed.). Upper Saddle River: Pearson Education.
Scheppers, J. S., & Raun, W. R. (2008). Nitrogen in agricultural systems (Agronomy monograph no. 49). Madison: ASA, CSSA & SSSA.
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Quemada, M., Delgado, A., Mateos, L., Villalobos, F.J. (2016). Nitrogen Fertilization II: Fertilizer Requirements. In: Villalobos, F., Fereres, E. (eds) Principles of Agronomy for Sustainable Agriculture. Springer, Cham. https://doi.org/10.1007/978-3-319-46116-8_25
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DOI: https://doi.org/10.1007/978-3-319-46116-8_25
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