Towards a second green revolution : from chemical to new biological technologies in agriculture in the tropics : proceedings of the international meeting, organized by the Accademia Nazionale delle Scienze detta dei XL, Palazzo Civiltà del Lavoro, Roma, Italy, in collaboration with the Commission of European Communities and with ENEA, held in Rome, Italy, 8-10 September, 1986 - Marini-Bettòlo, G. B. (Giovanni Battista) (Developments in agricultural and managed-forest ecology, 1987)