Índice.- Análisis de solución de suelo para monitoreo del fertirriego (Dra. C. Berrueta, Dr. R.Grasso, Téc. M. Falero). -- Análisis de savia para la determinación rápida del nivel de potasio, nitrato y calcio en el campo. (Dra. C. Berrueta, Dr. R. Grasso, Dr. G. Giménez, Ing. Agr. J. Bentancur, Ing.Agr. D. Rivero, Téc. Marcelo Falero). -- Consideraciones para el manejo del riego con tensiómetros. (Dr. R. Grasso, Dra. C. Berrueta).

ABSTRACT - Mandarin cultivars show a great diversity of fruit-quality and sensory characteristics, together with an extended harvest season. Citrus breeding is focused on exploiting season niches for higher prices as well as nutritional and sensory aspects, among others. In this context, the sensory characterization of new hybrids and the identi-fication of key characteristics of consumers ? liking provide valuable information towards breeding efforts and marketing strategies.

ABSTRACT.- Nutraceutical properties of mandarins are of great interest to promote their consumption. The occurrence of free amino acids in foods is relevant to assess the nutritional value of it. To learn more about the amino acids' occurrence and variability between species, a targeted metabolomics study in 'Ellendale', 'Willowleaf' and 'Page' varieties was performed through ion exchange liquid chromatography coupled to tandem mass spectrometry. The studied amino acids were asparagine, glutamic acid, glutamine, histidine, methionine, phenylalanine, proline, threonine and tyrosine.