CURZA—National University of Comahue;
Viedma;
Argentina;
Department of Agronomy;
Universidad Nacional del Sur;
Bahía Blanca;
Argentina;
Department of Geology and Geochemistry;
Autonomous University of Madrid;
Madrid;
Spain;
Alfalfa; Cattle; Manure; Composting; Mixture; Efficiency; Onion; Wastes;