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1Variable root shoot ratios and plant nitrogen concentrations discourage using just aboveground biomass to select legume service crops Variable root shoot ratios and plant nitrogen concentrations discourage using just aboveground biomass to select legume service cropsby Pinto, Priscila, Rubio, Gerardo, Gutiérrez, Félix, Sawchik, Jorge, Arana, Santiago, Piñeiro, GervasioTexto bibliotecaUBA FA