Descripción
Notas:"Proceedings of a symposium held on August 16, 1971, during the annual meeting of the Soil Science Society of America and American Society of Agronomy. Sponsored by divisions S-5, A-3, S-1, S-6, and S-7 of the societies."
Descripción Física:xi, 212 p. : il. ; 23 cm
Bibliografía:Incluye referencias bibliográficas.