The evaluation of profitability of weeding methods was performed on the basis of field experiment carried out in 2005–2007 at the Zawady Experimental Station owned by the University of Podlasie. Experimental variants included four weed control methods: mechanical as well as three objects of mechanical-chemical treatments with the use of herbicides Plateen 41.5 WG, Racer 250 EC and Sencor 70 WG. The method based on the standard gross margin (SGM) was used for the economic evaluation of the weed control methods. The aim of the research was the comparison of profitability of various methods of weeding of potato. The value of the obtained potato yield varied from 8288.5 to 14605.0 PLN·ha–1. The standard gross margin ranged from minus 484 PLN for the control treatment to 5851.5 PLN for treatment in which weeds were controlled with a herbicid Sencor 70 WG.

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