Potential of slurry from intensive dairy cattle farms for paulownia and populus trees, as organic fertilizer: I. effect on production

R. Menino^*, S. I. A. Pereira, H. Moreira, A. Castelo-Branco, A. A. Gomes, A. Rodrigues, J. Cunha, P. Castro, A. Veiga, E. Cardoso, M. J. Machado, R. Alves, F. Cardoso, F. Lopes, R. Guedes