Potato (Solanum tuberosum L.) is one of the crops worldwide produced under different climatic and cropping systems conditions. With the multitude of cultivars and variable relative maturity, numerous studies have shown that nitrogen management in potatoes is a key to tuber yield and quality. Most potato growers tend to apply high amounts of nitrogen fertilizer while yield is not always consistent with the applied nitrogen fertilizer rates. Thus, potato cropping system specialists have been developing critical nitrogen dilution curves across different environments and for different potato cultivars with quite large variability in the equations. This review aims to inventory the developed critical nitrogen dilution curves for potatoes worldwide and analysis the discrepancies. A literature search was performed using online search engines for 6 months using keywords such as nitrogen dilution curve, critical nitrogen dilution curves of potatoes. Published results collection was done for the well-known peer reviewed journals. The critical N concentration (Nc) is defined as the minimum nitrogen concentration for achieving maximum aboveground biomass at any time during the crop growing season and it is represented by an allometric function, i.e. Nc = aW-b where W is the total shoot biomass [Mg dry matter (DM) in ha -1], Nc is the total N concentration in shoot (g kg -1 DM), and a and b are estimated parameters. The parameter "a" of all monitored critical nitrogen dilution curves falls within the range [1.5, 7] of which 50% of the parameter "a" falls within the range of [5, 5.5] and the parameter "b" falls within the range [0.15, 0.60] with a large variation. The parameters "a" and "b" are impacted by the potato genotype, environment, and the management practices. Moreover, the estimation procedures of the parameters "a" and "b" were different and impacted the magnitude of these parameters. Based on some recent studies, we recommend the use of the Bayesian hierarchical method or the pooled Bayesian hierarchical method to develop a unique critical nitrogen dilution curve for potatoes that includes several genotypes, environment, and management practices for nitrogen fertilizer application rate optimization, system profitability and sustainability while reducing soil and water pollution by the nitrate leaching due to over fertilization and inappropriate split and timing of the nitrogen fertilizer application. La papa (Solanum tuberosum L.) es uno de los cultivos a nivel mundial que se produce bajo diferentes condiciones clim & aacute;ticas y de sistemas de cultivo. Con la multitud de variedades y la madurez relativa variable, numerosos estudios han demostrado que el manejo del nitr & oacute;geno en las papas es clave para el rendimiento y la calidad de los tub & eacute;rculos. La mayor & iacute;a de los productores de papa aplican altas cantidades de fertilizante nitrogenado, mientras que el rendimiento no siempre es consistente con las dosis de fertilizante nitrogenado aplicadas. Por lo tanto, los especialistas en sistemas de cultivo de papa han estado desarrollando curvas cr & iacute;ticas de diluci & oacute;n de nitr & oacute;geno en diferentes entornos y para diferentes variedades de papa. Esta revisi & oacute;n tiene como objetivo inventariar las curvas cr & iacute;ticas de diluci & oacute;n de nitr & oacute;geno desarrolladas para papas en todo el mundo y analizar las discrepancias. El par & aacute;metro "a" de todas las curvas de diluci & oacute;n cr & iacute;tica de nitr & oacute;geno monitoreadas se encuentra dentro del rango [1.5, 7] de los cuales el 50% del par & aacute;metro "a" se encuentra dentro del rango de [5, 5.5] y el par & aacute;metro "b" se encuentra dentro del rango [0.15, 0.60] con una gran variaci & oacute;n. Los par & aacute;metros "a" y "b" se ven afectados por el genotipo de la papa, el ambiente y las pr & aacute;cticas de manejo. Adem & aacute;s, los procedimientos de estimaci & oacute;n de los par & aacute;metros "a" y "b" fueron diferentes e impactaron en la magnitud de estos par & aacute;metros. Sobre la base de algunos estudios recientes, recomendamos el uso del m & eacute;todo jer & aacute;rquico bayesiano o el m & eacute;todo jer & aacute;rquico bayesiano combinado para desarrollar una curva cr & iacute;tica & uacute;nica de diluci & oacute;n de nitr & oacute;geno para papas que incluya varios genotipos, medio ambiente y pr & aacute;cticas de manejo para la optimizaci & oacute;n de la tasa de aplicaci & oacute;n de fertilizantes nitrogenados, la rentabilidad y la sostenibilidad del sistema, al tiempo que se reduce la contaminaci & oacute;n del suelo y el agua por la lixiviaci & oacute;n de nitratos debido a la fertilizaci & oacute;n excesiva y la divisi & oacute;n y el momento inapropiados de la aplicaci & oacute;n de la fertilizaci & oacute;n de fertilizantes nitrogenados.
