Closing Wheel Study

2017 Iowa Corn Closing Wheel Study - Placement

  • Iowa

The purpose of this study is to evaluate Schaffert’s 4 Link Closer and its effect on emergence, yield and profitability.


In this study, the Schaffert walking axle closing wheel system resulted in more consistent emergence than the other two treatments. On the other hand, the final stand with the walking axle system was much closer to t he planted population. However, that did not necessarily translate into a larger yield gain. Both of the Schaffert systems we tested appeared to have better mechanical characteristics that provided a better, more consistent soil contact than the standard closing tail.






Planted 4/12/2017 | Harvested 9/15/2017 | Population 36,000 Seeds/A. | Row Width 30 in. | Previous Crop Soybeans | Tillage Fall: In-Line Rip/Chisel, Spring: Field Cultivation | Herbicides Pre: 3.5 oz. Corvus®, 1 lb. Atrazine Post: 3 oz. Capreno®, 1 lb. Atrazine | Insecticides Escalate | Starter 8.5 gal. 32-0-0 2x2 | Total Nitrogen 190 Units as UAN | Brand 5513AMXT™* | Soil Type Nevin (Silty Clay Loam) | Soil Test Values pH 5.8, O.M. % 3.3, CEC 18.3 | Percent Base Saturation Ca 51.9, Mg 18.2, K 3.6, H 26.2 | Parts Per Million P 40, K 256, S 7, Zn 3.8, Mn 60, B 0.2


*®XL, Optimum, and AcreMax are registered trademarks of Pioneer. XL® brand seed is distributed by Beck’s Superior Hybrids, Inc.



Standard Closing Wheel Tail, Schaffert 4 Link Closer, Schaffert 4 Link Closer with Walking Axle