Relative location: טלגראס כיוונים חדרה קריות - telegram4israel.net, This principle involves the thoughtful planning of both zones and sectors based on where they are in relation to each other. A selective method has very little impact on non-target plants where as a non-selective method affects the entire area that is being treated. Mechanical control techniques can be either selective or non-selective. Brush cutting and weed eating are also mowing techniques that reduce the biomass of the weeds. Repeatedly removing biomass causes reduced vigor Telegram4israel in many weed species. Well established perennial weeds are much less effectively controlled because of the difficulty of removing all of the root system and perennating plant parts.