Potassium
A primary metal is obtained directly from ores.
Do you mean as an industrial agent, or as some kind of nutrient? Mercury is very toxic and should not be ingested for any reason. The primary useful role for mercury is that it is the only metal that is a liquid at standard temperature and pressure.
metal
Calcium is a metal and a nutrient mineral that helps build bones
you need metal for you have it in your body.most of the metal is from meat but it can come from plants to. SO YOU NEED METAL!
cement, metal and hold metal together
primary tensioner either needs adjustment or replacement
Noob you should know its metal
metal
The metal provides nutrients
Metal rust will not harm trees. There are a number of fungus rusts that can harm plants but they are not metal rusts.
heavy metal