by Bumb, B.L. (International Fertilizer Development Center)
Year of Publication 1992

by Bumb, B.L.
Published in Agricultural systems (01.01.1993)

by Bumb, B.L, Foster, T.H, Black, R.P
Published in Agro-Chemicals News in Brief (ESCAP/FAO/UNIDO) (01.09.1996)

by Byrnes, B.H. (IFDC, Muscle Shoals, AL.), Bumb, B.L
Published in Journal of crop production (1998)

by Bumb, B.L.
Published in Agricultural Systems (1993)

by Bumb, B.L, International Food Policy Research Inst., Washington, DC (USA) eng, Baanante, C.A
Year of Publication 1996