Afzalinia, S. 1995. Evaluation and comparison of two row planter in Fars province. M. Sc. Thesis. Faculty of Agriculture. Sshiraz university. Shiraz. Iran. (in Farsi).
Afzalinia, S. 1998. Evaluation of tomato pneumatic planters. J. Agric. Eng. Res. 12, 1-14. (in Farsi)
Botta, G. F., Becerra, A. T. and Melcon, F. B. 2009. Seedbed compaction produced by traffic on four tillage regimes in the rolling Pampas of Argentina. Soil Till Res. 105(1): 128-134.
De Vita, P., Di Paolo, E. Fecondo, G. Di Fonzo, N. and Pisante, M. 2007. No-tillage and conventional tillage effects on durum wheat yield, grain quality and soil moisture content in southern Italy. Soil Till. Res. 92, 69–78.
Desbioles, J. 2004. Mechanics and features of Disc openers in Zero-till application. Agricultural Machinery Research and Design Center. University of South Australia.
Exner, D. N. Thompson, R. L. and Thompson, S. N. 1996. Practical xperience and on-farm research with weed management in an Iowa ridge-tillage-based system. J. Prod. Agric. 9(4):496-500.
Grisso, R. D, Holshouser, D. and Pitman, R. 2002. Equipment Considerations for No-Till Soybean Seeding. Virginia Cooperative Extension Pub. 442-456.
Hemmat, A. and Taki. O. 2002. Grain yield of irrigated winter Wheat as affected by stubbel-tillage management and seeding rates in central Iran. Soil Till. Res. 63, 57-64.
Hofman, V., Fanning, C. and Deilbert, E. 1988. Reduced tillage seeding equipment for small grains. North Dakota State Univ. Ext. Serv. Bull. AE-826.
Martinez, E. Fuentes, J. Silva, P. Valle, S. and Acevedo, E. 1988. Reduced tillage seeding equipment for small grains. North Dakota State Univ. Ext. Serv. Bull. AE-826.
Merrill, S. D., Black, A. L. and Bauer, A. 1996. Conservation tillage affects root growth of dryland spring wheat under drought. Soil Sci. Soc. Am. J. 60(2): 575-583.
Peruzzi, M., Taffaelli, M. and Ciolo, S. D. 1996. Evaluation on the performamces of a peculiar combined machine for direct drilling and two no-till drills for hard winter wheat and maize cultivation. International Conference on Agricultural Engineering. Sep. 23-26. Madrid. Spain.
Senapati, P. C., Mohapatra, P. K. and Dikshit, U. N. 1992. Field evaluation of seeding devices for
finger-millet. A. M. A. 23(3): 21-2.
Taki, O. 2005. Development of direct drill with active opener for using in no tillage systems. Research Report. No. 96/1367. Isfahan Agricultural Research Center. (in Farsi)