The Influence of Tillage on Weed Density, Cotton Growth and Yield
Aug 3, 2018
A field experiment was conducted at Larissa, Greece, during 1996, on a clay soil (1% OM), to investigate the effect of three tillage systems (conventional, strip and minimum tillage) on weed emergence, cotton growth and weed-cotton competition. Mouldboard ploughing, followed by chisel ploughing and a single pass with a flexi-tine cultivator prior to cotton sowing constituted the conventional tillage. The strip tillage regime was with a 25-cm deep subsoil treatment at 95-cm intervals, followed by cultivation with a narrow crop cultivator. The minimum tillage treatment plots received a single pass with a flexi-tine cultivator. The combined effect of tillage system x herbicide application (alachlor, prometryne, fluometuron (applied alone), or alachlor EC and alachlor CS in a tank-mix with prometryne or fluometuron, respectively) on weeds and cotton was also examined. The results indicated that both conventional and minimum tillage systems gave taller cotton plants with greater leaf area, wider main stem and higher node number than strip tillage. More weeds were found with conservation tillage (strip and minimum tillage systems) than with conventional tillage. Cotton yield was higher in conventional tillage than conservation tillage systems. Fluometuron treatments produced better weed control and higher cotton yields than the other treatments.