Plants require a large number of trace elements for healthy growth. Even microscopically tiny amounts of trace elements can serve vital functions in organisms. PKS gardening tools enrich the soils with trace elements and thereby provide plants with essential nutrients. Traces of copper also occur naturally in healthy soils. They favourably influence the water balance in the soil and create the prerequisite for vigorous plant growth. PKS gardening tools are conducive to delicate, natural soil improvement.
*should not to be confused with copper sulphate :http://en.wikipedia.org/wiki/Copper_sulfate