Ascard, J. 1994. Soil cultivation in darkness reduced weed emergence. Acta Horticulture. 372: 167-177.
2.Bewley, J.D., and Black, M. 1994. Seeds – Physiology of Development and Germination, 2nd edn. Plenum Press, New York.
3.Buhler, D.D. 1995. Influence of tillage systems on weed population dynamics and management in corn, soybean and in the central USA. Crop Science 35: 124-1258.
4.Callaway, M.B., and Forcella, F. 1992. Crop tolerance to weeds. In: Callaway, M. B. and Francis, C.A. Crop Improvement for Sustainable Agricultural Systems. University of Nebrasks press, Lincoln, pp.100-131.
5.Chauhan, B.S., and Johnson, D.E. 2009. Seed germination ecology of Portulaca oleracea L.: an important weed ofrice and upland crops. Ann Appl Biol. 155: 61–69.
6.Coleman, R., and Gill, G. 2003. Trends in yielding ability and weed competitiveness of Austrulian wheat cultivars. Proceedings 2003 eleventh Australian Agronomy Conference, Geelong.
7.Danielle, J.R., and Van Acker, R.C. 2005. Seed burial by tillage promotes filed recruitment of false cleavers (Galium spurium) and catchweed bedstraw (Galium aparium). Weed Sci. 53:578-585.
8.Hadizadeh, M., and Zand, A.2004.Weed research orientation in the developed countries. Olive magazine.152:1-13.
9.Hartmann, K.M., and Nezadal, W. 1990. Photocontrol of weeds without herbicides. Naturwissenschaften. 77: 158-163
10.Hejazi, A. and Soufizadeh, S. 2004. Influence of duration of weed interference on cotton (Gossypium hirsutum L.) yield components and lint quality. In: Proceedings 2004 Fourth Internation Weed Science Congress, Durban, South Africa. Pp.112.
11.Juroszek, P., and Gerhards, R. 2004. Photocontrol of weeds. Agro & Crop Sci:190: 402-415.
12.Lemerle, D., Martin, P., Smith, A., Verbeek, B. and Rudd, S. 2000. Breeding for completive cultivars of wheat. In: Proceedings 2000 3rd International weed Control Congress. Corvallis, Oregon, USA. Pp.75.
13.Malik, V.S., Swanton, C.J. and Michaels, T.E. 1993. Interaction of white bean (Pharsalus vulgaris L.) cultivars, row spacing, and seeding density with annual weeds. Weed Science 41:62-68.
14.Mosavi, M.1998.Consolidated management of weed.Mead Publishing, Tehran. Pp.460.
15.Mosavi Neek, A., Rahimian Mashhadi, A., Jodakhanlou, A., Ghavidel, A. and Jahanian, A. 1999. The Impact of Tillage on Germinating Weeds in Plantation in Days and Nights. Reseach and Construction. 194-199:87.
16.Mohler, C.L. 2001. Enhancing the competitive ability of crops. In: Liebman, M., Mohler, C.L. Staver, C.P. (Ed.) Ecological Management of Agricultural Weed. Cambridge University Press, Cambridge, UK. 269–321.
17.Moody, K. 1978. Weed control in mungbean. In: 1978 First International Mungbean symposium. Taipei, Taiwan.pp. 132-136.
18.Peachey, R.E., and Smith, C.M. 2007. Influence of Winter Seed Position and Recovery Date on Hairy Nightshade (Solanum sarrachoides) Recruitment and Seed Germination, Dormancy, and Mortality. Weed Sci. 55: 49–59.
19.Rahimian, M., and Shariati, W. 1999. The Modeling Weed competition.Agricultural training Publishing. Pp.294
20.Scopel, A.L., Ballare, C.L., and Sanchez, R.A. 1991. Induction of extreme light sensitivity in buried weed seeds and its role in the perception of soil cultivations. Plant, Cell Environ. 14: 501-508.
21.Urwin, C.P., Wilson, R.G., and Mortensen, D.A. 1996. Late season weed suppression from dry bean (Phaseolus vulgaris) cultivars. Weed Technology 10:699-704.
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