Jones, M. The significance of crop residues to the maintenance of fertility under continuous cultivation at Samaru, Nigeria. Zaria: 1976 117-125 p. : tab.
Jones, M. The significance of crop residues to the maintenance of fertility under continuous cultivation at Samaru, Nigeria. Zaria: 1976 117-125 p. : tab.
Jones, M. (1976) The significance of crop residues to the maintenance of fertility under continuous cultivation at Samaru, Nigeria, Zaria: 117-125 p. : tab.
Jones, M. (1976). The significance of crop residues to the maintenance of fertility under continuous cultivation at Samaru, Nigeria. Zaria: 117-125 p. : tab.
Jones M. The significance of crop residues to the maintenance of fertility under continuous cultivation at Samaru, Nigeria. Zaria: 1976. p. 117-125 p. : tab.