Abouzeid, R. M., El- Razaz, F. M., Abdel-Kader, A. E. and Abdel- Malak, K. I. 1990. Compatibility of herbicides and mechanical inter-row cultivation cotton. Annals Agric. Sci., Moshtohor. 28(1): 133-145.
Anon. 2004. Agricultural Statistics of 2002-2003. Information and Technology Office. Ministry of Jihad-e-Agriculture. Issue No. of 83/06. (in Farsi)
Alemán, F. 2001. Common bean response to tillage intensity and weed control strategies. Agron. J. 93, 556-563.
Braseso, J., Leiva, I. and Alarcon, L. F. 1963. Atrazine, mechanical cultivation and combinations of the two for weed control in maize. Malezas. 11(3): 91-127.
Farsinejad, K. and Farahbakhsh, A. N. 1995. Effect of duration of annual weed competition on sugar beet. J. Sugar Beet. (1 &2), 13-15. (in Farsi)
Ferrero, A., Vidotto, F., Balsari, P. and Airoldi, G. 1999. Mechanical and chemical control of red rice (Oryza sativa L. var. sylvatica) in rice (Oryza sativa L.) pre-planting. Crop Protection. 18(4): 245-251.
Kwiligwa,E. M., Shetto, R. M., Rees, D. J. and Ley, G. J. 1994. Weed management systems based on animal-drawn cultivators for maize production in the Southern Highlands of Tanzania. Soil Till. Res. 29(4): 383-395.
Rudolf, R. 1996. Automatically controllable cultivation combination. Environmentally Careful Crop Cultivation in Sugar Beet Production. Neue- Landwirtschaft. 3, 78-81.
Soltani, G. R., Najafi, B. A. and Torkamani, J. 1985. Management of an Agricultural Unit. Shiraz University Pub. Shiraz. Iran. (in Farsi)
Steven, R. W. and Wiese, A. 1976. Competition of annual weeds and sugar beets. J. ASSBT. 19(2): 125-129.
Zamani, Gh. 1998. Evaluation of the weed controlling time and the number of controlling times on sugar beet yield in Beerjand area. Proceeding of the 5th Congress on Plant Science and Breeding. 1-4 Sep. 1-4. Karaj. Iran. (in Farsi)