Crop diversification for weed management - Ecological Management of Agricultural Weeds - page 371

Obiefuna, J.C.(1989).Biological weed control in plantains ( Musa AAB) with egusi melon
( Colocynthis citrullus L.). Biological Agriculture and Horticulture ,6, 221-7.
Ofori, F., & Stern,W.R.(1987).Cereal-legume intercropping systems. Advances in Agronomy ,
41, 41-90.
Ogg,A.G.Jr., & Dawson, J. H.(1984).Time of emergence of eight weed species. Weed Science ,
32, 327-35.
Okigbo, B.N., & Greenland, D.J.(1976).Intercropping systems in tropical Africa.In
Multiple Cropping , ed.R.I.Papendick, P.A.Sanchez & G.B.Triplett, pp.63-101.
Madison,WI: American Society of Agronomy - Crop Science Society of America -
Soil Science Society of America.
Olasantan, F. O., Lucas, E.O., & Ezumah, H.C.(1994).Effects of intercropping and fertilizer
application on weed control and performance of cassava and maize. Field Crops
Research ,39, 63-9.
Ominski, P.D., Entz, M.H., & Kenkel, N.(1999).Weed suppression by Medicago sativa in
subsequent cereal crops : a comparative survey. Weed Science ,47, 282-90.
Paine, L.K., & Harrison, H.(1993).The historical roots of living mulch and related
practices. HortTechnology ,3, 137-43.
Pielou, E.C.(1977). Mathematical Ecology. New York: John Wiley.
Plucknett, D.L., & Smith, N.J.H.(1986).Historical perspectives on multiple cropping. In
Multiple Cropping Systems , ed.C.A.Francis, pp.20-39.New York: Macmillan.
Power, J.F., & Follett, R.F.(1987).Monoculture. Scientific American ,256(3), 78-86.
Prasad, K., Gautam, R. C., & Mohta, N.K.(1985).Studies on weed control in arhar and
soybean as influenced by planting patterns, intercropping and weed control
methods. Indian Journal of Agronomy ,30, 434-9.
Pretty, J.N.(1995). Regenerating Agriculture: Policies and Practices for Sustainability and Self-
Reliance. Washington, DC: Joseph Henry Press.
Prokopy, R.(1994).Integration of orchard pest and habitat management: a review.
Agriculture , Ecosystems and Environment ,50, 1-10.
Radke, J.K., & Hagstrom, R.T.(1976).Strip intercropping for wind protection.In Multiple
Cropping , ed.R.I.Papendick, P.A.Sanchez & G.B.Triplett, pp.201-22.Madison,
WI: American Society of Agronomy - Crop Science Society of America - Soil
Science Society of America.
Rao, M.R., & Willey, R.W.(1980).Evaluation of yield stability in intercropping: studies on
sorghum/pigeonpea. Experimental Agriculture ,16, 105-16.
Reganold, J.P., Papendick, R.I., & Parr, J.F.(1990).Sustainable agriculture. Scientific
American ,262(6), 112-20.
Reinbott,T.M., Helsel, Z.R., Helsel, D.G., Gebhardt, M. R., & Minor, H.C.(1987).
Intercropping soybean into standing green wheat. Agronomy Journal ,79, 886-91.
Rippin, M., Haggar, J.P., Kass, D., & Kopke, U. (1994).Alley cropping and mulching with
Erythrina poeppigiana (Walp.) O.F.Cook and Gliricidia sepium (Jacq.) Walp.: effects
on maize/weed competition. Agroforestry Systems ,25, 119-34.
Risser, P.G.(1969).Competitive relationships among herbaceous grassland plants. Botanical
Review ,35, 251-84.
Rivas, C., Staver, C., & Blanco, M.(1993).Leaf mulch from four shade tree species for
weed control in shaded coffee.In Proceedings of the 16th Latin American Coffee
Symposium , p.83.Managua, Nicaragua: Interamerican Institute for Agricultural