Field performance of a pneumatic row crop planter equipped with active toothed coulter for direct planting of corn in wheat residue

  • J. Nejadi Agricultural Engineering Department, Shiraz University, Shiraz
  • M. H. Raoufat Agricultural Engineering Department, Shiraz University, Shiraz
Keywords: active coulter, speed ratio, seed placement, seed spacing, Triticum aestivum, Zea mays


In this research effects of active toothed coulter on planter penetration in semi-dried soils covered with previous wheat (triticum aestivum) residue was studied. Therefore, effects of three levels of speed ratio (coulter peripheral speed/tractor forward speed; 1.22, 2, 3) at two previous residue levels (baled and non-baled) and two modes of planter attachment (with and without row cleaner) on the corn (zea mays) planting depth and its uniformity, amount of surface residue, emergence rate index and seed spacings indices were investigated. Results showed that planting depth and its uniformity increased significantly with increasing speed ratio, so that desired planting depth was obtained at speed ratio of 2. The emergence rate index decreased with increase in speed ratio mainly due to increase in seeding depth at higher speed ratios. Miss and precision indices decreased in a significant manner with increase in the speed ratio. Other results showed that planting with row cleaner attachment into baled-out residue plots at speed ratio of 2 resulted in 31% decrease in miss and 30% decrease in precision indices as compared to control (inactive coulter). Quality of feed index at same conditions was 72%, the increase was up to 11% as compared to control. No significant difference was found between speed ratios of 2 and 3 for all the parameters studied. The results suggests that the row crop planter equipped with active toothed coulter and row cleaner attachment can be satisfactorily used for direct corn planting in hard soils covered with previous crop residues.


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Bianchini A, Magalhaes PSG, 2007. Evaluation of coulters for cutting sugar can residue in a soil bin. Biosyst Eng 100: 370-375. 

Cochran VL, Elliot LF, Papendick RJ, 1982. Effect of crop residue management and tillage on water use efficiency and yield of winter wheat. Agron J 24: 929-933. 

CTIC, 2011. Tillage type definitions. Conservation Technology Information Center. Available in [15 March 2011].


Derpsch R, Friedrich T, Kassam A, Li HW, 2010. Current status of adoption of no-till farming in the world and some of its main benefits. Int J Agric Biol Eng 3(1): 82-91. 

Erbach DC, 1982. Tillage for continuous corn and corn-soybean rotation. T ASAE 25: 906-911. 

Fallahi S, Raoufat MH, 2008. Row- cleaner planter attachments in a conservation tillage system: A comparative study. Soil Till Res 98: 27-34. 

Farnham D, 2001. Corn planting guide. Dept Agron, Iowa St Univ, Iowa, USA. Available in


Kaspar TC, Erbach D, 1998. Improving stand establishment in no-till with residue-clearing planter attachment. TASAE 41: 31-36. 

Katchman SD, Smith JA, 1995. Alternative measures of accuracy in plant spacing for planter using single seed metering. T ASAE 38: 379-387. 

Magalhaes PSG, Bianchini A, Braunbeck OA, 2007. Simulated and experimental analyses of a toothed rolling coulter for cutting crop residues. Biosyst Eng 96(2): 193-200. 

McCarthy JR, Pfost DL, Currence HD, 1993. Conservation tillage and residue management to reduce soil erosion. Agric Publ G-1650, University of Missouri, Missouri, USA. 

Mckyes E. 1985. Soil cutting and tillage. Elsevier, NY. 

Papendick R, 2002. Managing soil cover and roughness. Farming with the wind. Dept Crop Soil Sci, Washington St Univ, Chapt 4, pp: 17-22. 

Raoufat MH, Matbooei A, 2007. Row cleaners enhance reduced tillage planting of corn in Iran. Soil Till Res 93: 152-161. 

Ritchie W, Hanway JJ, Benson GO, 1993. How a corn plant develops. CES Special Report 48, Iowa St Univ, p. 21.

Sanavi N, Raoufat MH, 2006. Comparative performance of four planter furrow opener and row cleaner arrangements in a conservation tillage corn production system. Iran Agric Res 25(1): 53-66. 

Tanaka D, Grant C, Hofman V. 1997. Zero tillage-advancing the art. North Dakota Zero Tillage Farmers Assoc, Dakota, USA. Available in:


Tice E, Hendrick J, 1992. Disk coulter operating characteristics. T ASAE 35: 3-10. 

Wicks GA, Cruchfield A, Burnside O, 1994. Influence of wheat (Triticum aestivum) straw mulch on metolachlor corn (Zea mays) growth and yield. Weed Sci 1: 141-147.

How to Cite
NejadiJ., & RaoufatM. H. (2013). Field performance of a pneumatic row crop planter equipped with active toothed coulter for direct planting of corn in wheat residue. Spanish Journal of Agricultural Research, 11(2), 327-334.
Agricultural engineering