Biochar decreases nutrient leaching in KCl-fertilized Podzols grown with black mucuna oleh Luciana Aparecida Rodrigues, Caroline Cândida Martins, Tainá Costa Araújo, Claudio Roberto Marciano, Júlia Gallon Barcelos, Rosely Menezes da Silva Ribeiro, Mauricio Gonçalves da Silva, Deborah Guerra Barroso