The role of green manure nitrogen use by corn and sugarcane crops in Brazil - Ambrosano, Edmilson Jose; Cantarella, Heitor; Ambrosano, Glaucia Maria Bovi; Dias, Fábio Luís Ferreira; Rossi, Fabrício; Trivelin, Paulo Cesar Ocheuze; Muraoka, Takashi (Agricultural Sciences, 2013)