Mineral elements which are needed by some plants in very small quantities. If the plants you are growing require specific 'trace elements' and they are not available in the soil, they must be added.
Microampere
One millionth of an ampere.
Microclimate
The local climate of specific place or habitat, as influenced by landscape features.
Microcomputer
Personal computer operated with a microprocessor.
Microgroove
A small groove scribed into the surface of a solar photovoltaic cell which is filled with metal for contacts.
Micrometer
U-shaped frame with a spindle with 40 threads per inch, which is able to measure, with precision up to the nearest 0.001 of an inch. Each time the spindle revolves, it moves it 1/40 (.025) of an inch. The thimble, which encloses the spindle, has 25 equally spaced graduations, around it. When the thimble revolves 1/25 of a revolution, the spindle moves 1/1000 of an inch.
Micron
A unit of measure, one thousandth of a meter. Used to describe the pore size of filters.
Microorganisms
Animals and plants that are too small to be seen clearly with the naked eye but are the soil enablers helping to improve the dirt.
Microstructure
Structure of a material or cell, as seen through a microscope, such as the crystalline structure of metal.
