A importância da matéria orgânica nos sistemas agrícolas
By: Marcos A. Pavan, Júlio César Dias Chaves.
Contributors: Chaves, Júlio César Dias.; Fundação Instituto Agronômico do Paraná.
Series: Circular -- no. 98.; Circular (Fundação Instituto Agronômico do Paraná) -- no. 98.
Publisher: Instituto Agronômico do Paraná
Published: 1998
Place of publication: Londrina, PR
Language: por
Number of pages: 35
Subjects: Humus.; Soil fertility.
Notes: "Abril/98"

Includes bibliographical references (p. 32-35).