Effects of Tillage Methods and Wheat Residue Management on Corn Yield and Some Soil Properties.
2009
Azad Shahraki, Farzad | Najafi Nezhad, Hamid | Javaheri, Mohammad A`li | Kuhi, Nader | Shafi`i, Ladan | Afzali, Hushang
Change in number and intensity of tillage operation and plant residue application change physical soil properties and soil organic carbon. Conventional tillage methods are used for preparation of seed bed in Kerman. The aim of this research was to compare the effect of tillage methods and effect of plant residues on some soil properties in corn cultivation. For this purpose, four levels of tillage treatments and two levels of wheat residue management were used in Kerman research farm (Shahid Zendeh Rooh station). Tillage treatments levels consisted of conventional tillage, reduced tillage, no tillage and planting on bed, no tillage and planting in the furrow and wheat residue management in two levels were performed. 1- preservation of past year wheat residue in the farm and 2- exiting of past year wheat residue from farm. This experiment was performed as split plot in randomized complete block design with three replications. Soil organic carbon and bulk density, height of plant, yield and yield components were measured. The results indicated that soil organic carbon in conventional tillage and reduced tillage treatments was at least level (0.342 , 0.340) and had the most level (0.355 , 0.357) in no tillage treatments. The treatments had not any significant effect on bulk density. Grain yield was the most in reduced tillage treatment. Yield components ( kernel in rows, rows in ear and 1000 kernel weight) were not affected by experimental treatments. It seems that the application of the treatments of this study could effect on more soil properties in corn cultivation in longer time.
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