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Discussion papers | Copyright
https://doi.org/10.5194/se-2017-13
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 01 Mar 2017

Research article | 01 Mar 2017

The effects of tillage methods on soil aggregation and crop yields in a wheat-corn rotation under semi-arid conditions

Hossein Tabiehzad1, Gokhan Cayci2, and Kiarash Afshar Pour Rezaeieh3 Hossein Tabiehzad et al.
  • 1Department of soil and water, Agricultural Research Center of West Azerbaijan, Urmia, Iran
  • 2Department of Soil Science and Plant Nutrition, Faculty of Agriculture, Ankara University, Ankara, Turkey
  • 3Department of Field Crops, Agricultural Faculty, Igdir Un iversity, Igdir, Turkey

Abstract. In this study, the effects of different tillage methods under wheat-corn two-course rotation system on the some soil aggregation properties and yields were investigated. Experiment was laid out in a split plot design with three replications during four crop years. Subsoiler, moldboard, sweep and chisel as main plots and rotary tiller and disc harrow as sub-plots have been used in this study. The results showed that tillage methods were significant at (P<0.01) as regards crop yields, and the highest yields as 6249 and 11720kg/ha for wheat and 9891 and 73080kg/ha for corn grain and biomass were produced in subsoiler treatment, respectively. Subsoiler+rotarytiller treatment was significant at (P<0.05) with 2.063mm as to mean weight diameter (MWD) value. The subsoiler and chisel were statistically in the same group with regard of water stable aggregates (WSA) value, and it was significant at (P<0.05) with 67,83%. Bulk density, total porosity and air porosity values were significant at (P<0.01), and 1.38grcm-3, 51.2% and 12.5% values were determined in rotary tiller application, respectively. Field capacity (FC) and permanent wilting point (PWP) were significant at (P<0.05) and (P<0.01) with 31.89% and 17.21% values in the chisel treatment, respectively. Crop yields and positive effects on the physical properties were considered subsoiler+rotary tiller treatment was the most successful, and it was followed by chisel+rotary tiller treatment according to four-year study results. Key words: Soil quality, subsoiler, chiesel, soil structure

The discussion paper was formally withdrawn.
Hossein Tabiehzad et al.
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Hossein Tabiehzad et al.
Hossein Tabiehzad et al.
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The requested manuscript was not accepted for publication in Solid Earth and was retracted upon request of the authors.

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