Effect of copper on formation of green mass and nutritional qualities of broad beans

It is shown on the basis pot experiment data that, depending on the concentration and length of effect of copper, not only the magnitude but also the direction of the effect can change. A dose-dependent accumulation of the metal and an increase in crude protein content are noted in the green mass of broad beans at a copper pollution level in sod-podzolic soil of 100–300 mg/kg.